This is inspired by the long running alternate warships of nations thread and works fairly similar to that long running discussion.

You can post your scenarios and alternate aircraft here, as well as post any basic questions regarding plausibility of certain scenarios, viability of aircraft studies, effects of your aircraft being introduced in place of their historical counterparts. That sort of thing.

If you have any general or specific questions ask them here. What was the bombload of the Heinkel 111? Ask it here, wonder how competetive Italian aircraft were in 1940? Ask it here. Wonder what the result of the Dutch airforce having more Fokker D.XXI on hand at the time of the German invasion? This is the place.

If your timeline has a historical airforce adopting a different aircraft than they did historically then this is the place. Have a scenario where the HE-100 was adopted by the Luftwaffe over the BF-109 this is the place to test it. A scenario where the CAC Boomerang is built with a more capable engine, this is the place.

You want to list the aircraft that your alternate nation adopts, both your own original aircraft types as well as actually built examples, this is the place.
 
To get us started off how about a bit of a joke. How I would equip the Royal Elbonian airforce in 1945.

Elbonia is a small eastern European republic who's chief export is mud. In my position of air minister I have the responsibility of totally re-equipping the airforce, it is assumed that prior to this the Elbonian airforce did not have any aircraft of modern capability and so its entire airforce is in need of replacement. The categories desired for replacement are as follows

Heavy bomber
Medium Bomber
Strike bomber, multi-role aircraft capable of a wide variety of roles. A good example would be the DeHaviland Mosquito.
Long range escort fighter
interceptor
fighter-bomber
torpedo bomber
dive bomber
ground attack aircraft
reconnaissance aircraft
liason aircraft
maritime patrol aircraft
logistics support aircraft
Trainer

Note that multiple roles can be performed by the same airframe, and this is desirable for the limited budget of the Elbonian airforce. Also note that aircraft from any nation which participated can be procured in numbers necessary for equipping the airforce. A single aircraft will be adopted to fill each role, so multiple fighters or bombers will not be acquired for a single category.

And here is the catch. Secretly I, the chief of the Elbonian purchasing commission for acquiring new aircraft, am in reality a traitor. And I want all aircraft purchassed to fail once in service, however I cannot be obvious about the aircraft I purchase. So at first glance the types adopted must look to be of good quality and capability.

Heavy Bomber
Heinkel He-177
On paper the Grief is a capable aircraft, combining a decent bombload with a useful range and defensive armament. Range is also tolerable as Elbonians enemies are all rather close to the republics borders.
In reality however this plane was plagued with problems. Its engines, already trouble prone, were placed in very cramped engine nacelles which caused overheating problems. Giving the type a tendency to catch fire mid flight. The type was also built in relatively limited numbers and by a defeated nation. In the long run spare parts are likely going to be an issue.

Medium Bomber
Heinkel He-111
A proven and well tested design the He-111 is chosen because it saw service throughout the war and has been adapted to a large number of roles. In addition the type is in production outside of Germany by nationalist Spain. Meaning that spare parts and additional airframes can be acquired from a source which has not been bombed to kingdom come.
By this point however the He-111 is now clearly obsolete and far to lightly armed for effective use against well prepared enemy defenses. The planes bomb load is also not what is desired, and the range of bombs it can carry will prove limited.

Strike Bomber
Savoia Marchetti sm.79
Again a design proven effective through years of war. Although it began the war as an Italian medium bomber it proved adaptable to a number of additional roles, as such the type will also be used as a torpedo bomber by the airforce. This will smooth reduce the number of types in service with the airforce and make training easier for new pilots. It also looks good, which will inspire its crews to perform better.
It will quickly be found that the type is hopelessly outdated. Being slow, fragile, lightly armed and requires a long runway to take off. The type is also large for its intended role and is basically a second type of medium bomber. Putting added strain on Elbonian logistics and budget.

Escort Fighter
Potez 63
A small and capable French three man fighter capable of performing a variety of roles the type was widely used by both sides in the second world war and was built in a number of variants. Equipped with 20mm cannon the type will make short work of enemy aircraft. The type is expected to also serve in the reconnaissance and night fighter roles. The type also saw service in many airforces.
As will promptly be discovered there may be some difficulty in procuring spare parts, or even serviceable airframes in the numbers needed. The type being built only in limited numbers and no new airframes being built in some time. Upgrading the plane with modern equipment may also prove difficult.

Interceptor
Messerschmitt Me-163
The Komet uses a rocket engine to rapidly climb to altitude to engage enemy bombers. As such it does not need much in the way of advanced warning to engage targets, the type is also very fast and difficult to hit.
Rocket engine, basically a flying bomb waiting to go off. Need I say more. Elbonia will soon be littered with wreckage from these things as accidents from the German planes was already very common. It will also likely be expensive to get fuel for the planes, training pilots could also prove difficult...of even finding pilots to fly them in the first place. Whats that about jets you ask? Those will never work.

Fighter-Bomber
Bell P-63 Kingcobra
Well liked by Soviet pilots and seeing use also with the free French the P-63 is American made, which Elbonians believe makes it very good. The type is also known as being very reliable and can take damage.
It looks like the Aircobra which I quite like, nothing to bad to say about the plane other than the USAAF did not adopt it for service and few were built so parts could be hard to find.

Torpedo Bomber
See strike bomber

Dive Bomber
Fairey Barracuda
Used by the fleet air arm of the Royal navy the Barracuda saw service in many places throughout the war. For some reason the RN does not seem to want to keep them with the war over and is looking to buy Avengers instead, so we should get them at really cheap prices.
While not a bad plane in 1940 the Baracuda struggled in many areas and was less than desirable. One flaw which was discovered was that it did not perform great at altitude. The Barracuda is also a torpedo bomber. So good luck to the hapless Elbonian pilots which try to fly the thing as a dive bomber. Or the ground crews which try and fit bombs on the plane.

Ground Attack
Junkers Ju-87
The Stuka is an iconic symbol of the Luftwaffe in wwii. Even if it had gotten on it years its achievements in 1940 surely prove that it is still a powerful front line unit in the year 1945 right?
No, no it does not. The Stuka is hopelessly outdated compared to most ground attack aircraft. Germany just could not replace it because of the war. It is easy pickings for ground crews and hopeless if caught by enemy fighters unescorted.

Reconnaissance
See escort fighter

Liason
I dont care about liasing with anyone. Also my feet hurt from walking around and looking at all these airplanes. Also I only care for planes with guns and bombs so why bother.

Maritime patrol
Elbonia does not have a coastline as far as I know. But what the heck why not buy some PBY Catalina's just in case? Elbonia can always use more planes.

Logistics
I think the Sm.81 will work. It served the Italians well enough in the war. And I dont like the US Dakota. Yes that will work.
Its dated and cant carry as much as we would like. But it will probably work. I guess.

Night Fighter
See Escort fighter

Trainer
Bf-108
Just one shy of the Bf-109 and very capable, a dream to fly. Training pilots will be lulled into a false sense of security by flying this type. Becoming convinced that their airforce knows that it is doing.
 
Okay first and foremost this is an idea of the Commonwealth of Australian that declared on the world stage to no longer be attached at the umbilical to Great Britain in the aftermath of Gallipoli. Australia still has ties to the mother country but builds it's own aircraft and has CAC licence produce the designs they either make themselves or purchase.

Shortly after WW1 the leading aviation companies in the mother country got asked to establish factories under a government builds and company operates basis.
Bristol was the only engine manufacturer to jump at the chance and used Australian funds to subsidise the Roy Fedden work with sleeve valves. The advances caused by the extra funds helped mature the engine faster and the Perseus 100 was producing 1200hp in 1938 with good reliability. This improvement was far more noticeable by the rapid implementation of the Hercules engine and in 1939 was producing 1400hp. By 1942 this was increased to 1650 hp. The availability of sleeve valve production with a mature production line saw many aircraft using radials while the Mother country focused on the Merlin series.

All aircraft are as of January 1942

Heavy bomber.......Handley Page Halifax with Hercules engines
Medium Bomber..........Vickers Wellington with Perseus engines and Hercules being introduced.
Strike bomber, multi-role aircraft capable of a wide variety of roles...... Bristol Beaufighter
Long range escort fighter ........Bristol Beaufighter
interceptor........Gloster Boomerang. (F5/34 with 1000hp Bristol Perseus 100 able to be a 1200hp engine in 42)
fighter-bomber....... Bristol Beaufighter and Boomerang both using 3 inch RP and or 250 lb bombs
torpedo bomber...... Bristol Beaufort using Perseus 100
dive bomber.....Vultee Vengence with Bristol Hercules being delivered without engines for CAC to fit. (deliveries beginning in March)
ground attack aircraft......Beaufighter's fulfil the ground attack with RP 3 inch
reconnaissance aircraft......Vickers Wellington pressurised aircraft flying at 36,000 feet.
liason aircraft...... Avro Anson
maritime patrol aircraft......Short Sunderland with Perseus engines.
logistics support aircraft....... Several Handley Page Halifax modified as being built with wider fuselage.
Trainer...... Tiger Moth and Avro Anson
 
My favourite would be avoid the UK slowdown late- and post-war and have the Hawker P1052 and P1081 in RN and RAF (and also Commonwealth) service in time for Korea.

Or faster development of the De Havilland Venom!
 
I like Blackburn's proposed supersonic variant of the Buccaneer as an alternative to the bleeding edge napkin waffe TSR 2. It would have a better chance of actually seeing service.

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1603296600513.png
 
Okay first and foremost this is an idea of the Commonwealth of Australian that declared on the world stage to no longer be attached at the umbilical to Great Britain in the aftermath of Gallipoli. Australia still has ties to the mother country but builds it's own aircraft and has CAC licence produce the designs they either make themselves or purchase.

Shortly after WW1 the leading aviation companies in the mother country got asked to establish factories under a government builds and company operates basis.
Bristol was the only engine manufacturer to jump at the chance and used Australian funds to subsidise the Roy Fedden work with sleeve valves. The advances caused by the extra funds helped mature the engine faster and the Perseus 100 was producing 1200hp in 1938 with good reliability. This improvement was far more noticeable by the rapid implementation of the Hercules engine and in 1939 was producing 1400hp. By 1942 this was increased to 1650 hp. The availability of sleeve valve production with a mature production line saw many aircraft using radials while the Mother country focused on the Merlin series.

All aircraft are as of January 1942

Heavy bomber.......Handley Page Halifax with Hercules engines
Medium Bomber..........Vickers Wellington with Perseus engines and Hercules being introduced.
Strike bomber, multi-role aircraft capable of a wide variety of roles...... Bristol Beaufighter
Long range escort fighter ........Bristol Beaufighter
interceptor........Gloster Boomerang. (F5/34 with 1000hp Bristol Perseus 100 able to be a 1200hp engine in 42)
fighter-bomber....... Bristol Beaufighter and Boomerang both using 3 inch RP and or 250 lb bombs
torpedo bomber...... Bristol Beaufort using Perseus 100
dive bomber.....Vultee Vengence with Bristol Hercules being delivered without engines for CAC to fit. (deliveries beginning in March)
ground attack aircraft......Beaufighter's fulfil the ground attack with RP 3 inch
reconnaissance aircraft......Vickers Wellington pressurised aircraft flying at 36,000 feet.
liason aircraft...... Avro Anson
maritime patrol aircraft......Short Sunderland with Perseus engines.
logistics support aircraft....... Several Handley Page Halifax modified as being built with wider fuselage.
Trainer...... Tiger Moth and Avro Anson
Its funny, I literally just found a youtube channel called Tomato Eins which has several videos about CAC aircraft.
 
Okay first and foremost this is an idea of the Commonwealth of Australian that declared on the world stage to no longer be attached at the umbilical to Great Britain in the aftermath of Gallipoli. Australia still has ties to the mother country but builds it's own aircraft and has CAC licence produce the designs they either make themselves or purchase.

Shortly after WW1 the leading aviation companies in the mother country got asked to establish factories under a government builds and company operates basis.
Bristol was the only engine manufacturer to jump at the chance and used Australian funds to subsidise the Roy Fedden work with sleeve valves. The advances caused by the extra funds helped mature the engine faster and the Perseus 100 was producing 1200hp in 1938 with good reliability. This improvement was far more noticeable by the rapid implementation of the Hercules engine and in 1939 was producing 1400hp. By 1942 this was increased to 1650 hp. The availability of sleeve valve production with a mature production line saw many aircraft using radials while the Mother country focused on the Merlin series.

All aircraft are as of January 1942

Heavy bomber.......Handley Page Halifax with Hercules engines
Medium Bomber..........Vickers Wellington with Perseus engines and Hercules being introduced.
Strike bomber, multi-role aircraft capable of a wide variety of roles...... Bristol Beaufighter
Long range escort fighter ........Bristol Beaufighter
interceptor........Gloster Boomerang. (F5/34 with 1000hp Bristol Perseus 100 able to be a 1200hp engine in 42)
fighter-bomber....... Bristol Beaufighter and Boomerang both using 3 inch RP and or 250 lb bombs
torpedo bomber...... Bristol Beaufort using Perseus 100
dive bomber.....Vultee Vengence with Bristol Hercules being delivered without engines for CAC to fit. (deliveries beginning in March)
ground attack aircraft......Beaufighter's fulfil the ground attack with RP 3 inch
reconnaissance aircraft......Vickers Wellington pressurised aircraft flying at 36,000 feet.
liason aircraft...... Avro Anson
maritime patrol aircraft......Short Sunderland with Perseus engines.
logistics support aircraft....... Several Handley Page Halifax modified as being built with wider fuselage.
Trainer...... Tiger Moth and Avro Anson
I'd add in the Bristol Bombay as transport and bomber trainer.
 
Here is a trainer adaptation of the Ki-43-III Hayabusa, which I had dubbed as the Ki-121
nakajima-ki-121.png

The Nakajima Ki-121, which is a development of the famous Ki-43 Hayabusa fighter. Developed after the Pacific War for the Japanese Army Air Service as an advanced trainer aircraft. The type would enter service with the IJAAS in 1946 and would be used for this role with them until 1978 when they were replaced by newer designs. Japan's client states and allies such as Manchukuo and Peru would use them for longer well into the 1990s with some of them using them for counter-insurgency use. In the present day, these planes are popular with warbird flyers and enthusiasts, owing to it's ease of flight.
 
Fiat Cr. 32.jpg


Royal Alyskan Airforce Fiat Cr.32 biplane fighter of the 3rd воздушный флот (air fleet) while stationed in Patagonia early in the third Patagonian war in March of 1939.

Ordered in 1934 one hundred fighters were acquired from Fiat, as well as a license to build the fighters. Domestic production by the Royal Aircraft Factory began in Novoya Amsterdam in 1935 and ended in 1939, by which time just over five hundred aircraft had been built using Vodham engines and 8mm machine guns. The type made up the bulk of the Alyskan fighter forces early war and saw significant action against Argentine and Brazilian fighters during the conflict, several examples of the type were also given to the kingdom of the Platte's airforce and remained in service long after Alyskan versions were retired in 1940-1941.

Several squadrons of the fighters were also sent to Europe following the kingdoms declaration of war against Germany in response to the invasion of the Netherlands in 1940. However they arrived to late to take part in the defense of Holland and instead were used extensively in the opening days of the battle of Britain, although the type was outclassed by German aircraft and quickly sent to help in the defense of the Mediterranean, where they would duel Italian Cr.32's in the opening stages of the North African campaign.

Replaced by the Viper mark one and two from 1940 onwards the Cr.32 was quickly retired from most roles, though it did survive until 1943 in training schools. Today the Posadka and Novoya Amsterdam aviation museums contain several examples of the type, both domestically purchased versions and Italian examples.
 
I know that a few people have dreamed up of an idea for an A6M9 powered by a Homare engine.
1603322896785.png

(I found this in a post on secretprojects.co.uk. Credit for the picture goes to a user on warbirds.jp.)
 
In 1938 a fighter variant of the Miles Kestrel trainer is offered to the Fleet Air Arm as an alternative to the Gloster Sea Gladiator. First powered by a Canadian built HS 12 Y engines and later Merlins its performance is better than any naval fighter in current service. Entering service in May 1939 and serving in front line squadrons until late 1942 when it is replaced by Grumman Hellcats. Serves on escort carriers and in second line roles until 1946. The Aircraft is solely built in Canada. Miles in the UK concentrate on the trainer variant (the Master isn't developed) using Peregrine engines initially and later Merlins.

1603323961970.png
 
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In 1938 a fighter variant of the Miles Kestrel trainer is offered to the Fleet Air Arm as an alternative to the Gloster Sea Gladiator. First powered by a Canadian built HS 12 Y engines and later Merlins its performance is better than any naval fighter in current service. Entering service in May 1939 and serving in front line squadrons until late 1942 when it is replaced by Grumman Hellcats. Serves on escort carriers and in second line roles until 1946. The Aircraft is solely built in Canada.

View attachment 592850
One of the better looking planes ever IMHO
 
A-12Main.jpg


USN McDonnel-Douglas A12 Avenger II

The navies replacement for the aging A6 Intruder the A12 entered service after lengthy delays in 1994, and was the primary bomber of USN carrier strike groups by 2001 when they played an extensive role in the American invasion of Iraq. The type remains in service today in large numbers alongside the F18. Talks of replacing the plane with new F35s have begun, but it is planned to keep them in service into the 2030s.
 
In the early 1980s, alongside the US Air Force’s European Distribution System Aircraft (EDSA) that led to the supply of Shorts C-23A Sherpas for use by the USAF in Europe, a requirement was noted for a smaller, fast aircraft that would allow high priority movement of personnel and to enable pilots on ground tours to maintain their flying proficiency; in essence a modern version of the station or base ‘hack’. After considering transferring T-37 or T-38 aircraft from Flying Training Command, the USAF ordered sixteen British Aerospace Hawk Mk.60 aircraft in April 1983 to fulfil this requirement. Acquired off the shelf, the Hawk was seen as an ideal choice for the role, and a support and maintenance contract was signed with British Aerospace under which the company would provide all depot level maintenance for the aircraft at its Dunsfold location.

Designated T-45B, Hawks were delivered in the standard USAF European One camouflage scheme. 100-Imperial gallon auxiliary fuel tanks were normally carried, while a baggage pod based on the ADEN cannon pod was fitted on the centreline. The first T-45B was handed over to USAFE at its operating location of RAF Upper Heyford in January 1985, and further single aircraft were based at Mildenhall, Lakenheath, Bentwaters and Woodbridge in the United Kingdom, Aviano in Italy, Torrejon in Spain, Bitburg, Zweibrucken, Spangdahlem, Hahn and Ramstein in West Germany and Incirlik in Turkey.

With the drawdown of USAFE in the early 1990s Hawks were officially withdrawn from the hack role in 1992. They were placed in storage at Dunsfold and sold to Kuwait the following year.
 
Drop-tank outfitted P-51 powered by Packard Merlin V-1650-1 ; both airframe and engine are in volume production in 1942.
Mustang I re-engined with Merlin 45/47/50 in the UK, with drop tank facility - there is 600-700 airframes to convert (depending on previous attrition). The two Mustang types solve the escort problem already in 1943.
Spitfire VII/VIII/IX with a 50 gal rear tank - see above.
P-47 with actual drop-tank capability - see above.
Spitfire III is mass produced - 380-390 mph in 1940, combat-worthy.

Fw 190 powered by V12 engine - combines good features of Fw 190 line (rate of roll, good streamlining & performance, strong & wide set U/C, generous volume for guns/ammo/fuel, excellent visibility) with less problematic engines and much better mileage.
Ju 88 made as high-wing aircraft.
Ju 288 with working engines (BMW 801, DB 603).
Me 163 is designed around a jet engine.
He 219 is a fast bomber, gets jet engines by winter of 1943/44.

MiG-3 powered by AM-38, and then by AM-39; two-three-four cannons; fixed problems with canopy opening in emergency.
ANT-58 (Tu-2 prototype) is proceeded with.

'MC.201' - the MC.200 powered by I-F Asso IX engine.
'Fiat G.54' - precursor to the Fiat G.55, but powered by G&R 14R engine made by Fiat on French tooling; 4 cannons.
'Re.205' - dive bomber/torpedo bomber based on Re.2005
IMAM Ro.58 is proceeded with.

'Ki-190' - Fw 190 licence produced in Japan, powered by Japanese engines (1st Ha 41, then Ha 109, then Homare or water-injected Ha-112-II from the Ki-46), uses other Japanese bits & pieces.
Ki-45 and 46 are designed as bomber 1st, everything else 2nd.
A bigger bomber, size not unlike the P1Y/A-20/Mosquito (= smaller than G4M) for better speed & range.
Zero with armor, powered by Ha 41 engine, later with Kinsei.
 

Driftless

Donor
Following a different path from the 1933 Norwegian Parliamentary elections, more funding is made available for building Norway's aviation infrastructure. The idea is to create some public works construction jobs in the short run during the Depression while preparing the country for a modernized economy going forward. With Norway still being ardently in a non-military mindset, the works are intended for civilian purposes: improved runways, hangars, control towers, seaplane/floatplane ramps, and repair shops. Also funded was an expanded pilot and aviation mechanic training scheme (what good are improved facilities without the crews to use them?)

With the improved infrastructure in the works, a mix of public and private investment in training and light commercial aircraft was undertaken in the 1933-38 time range
Trainers​
DeHavilland DH.82 Tiger Moth (built under license in Norway)​
M.F 10 Floatplane trainer (Designed and built-in Norway) used by both civilian and military training facilities​
Civilian​
Grumman Goose​
Noorduyn Norseman​
Bellanca Aircruiser​
Avro Anson​
Sikorsky S-43​
Military​
M.F.10​
Douglas DT-2 B/C​
Fokker C.V.D & E​
With the situation in the rest of Europe looking more ominous in the 1936-39 time frame, the Norwegians take a more preparatory stance on protecting their neutrality

Military​
Northrup A-17 - 12 delivered 1936​
Gloster Gladiator - 24 delivered 1937​
Douglas A-33 - 24 delivered fall 1939​
Northrup N-3PB - 24 delivered fall 1939 (a year earlier than OTL) (A floatplane derived from the A-17)​
Curtis Hawk 75A-8 - 48 delivered between 1939 and early 1940​
Fokker D.XX1 - 24 delivered 1938​
 
I-16 built in Germany, Poland, Yugoslavia, UK, France, USA, Sweden, Switzerland, Belgium, Japan, Canada, Australia, Spain, Italy, Czechoslovakia...
Retractable-wheel version of Ki-27 with Zuisei engine, 6 LMGs.
Fokker D.XXI powered by Twin Wasp (not Twin Wasp Junior), retractable U/C.
DH.77 designed around the RR Kestrel engine.
Bf 109 produced in USSR, France, UK, Italy, USA, powered by indigenous V12 engines.
Bf 109 with HS-12Y engine and MK 101/103 cannon, to be used as ground attack A/C.
P-36 powered by 2-stage supercharged R-1830.
Navalized P-36 instead the F2A.
Hurricane & Spitfire powered by Hercules engine, fighter-bombers.
Bristol Blenheim powered by Merlin.
Avro Manchester powered by R-2800s.
Gun-less Avro Manchester powered by Bristol Hercules.
A.W.27 Ensign is a bomber, not a transport aircraft.
A 'gun-less' Avro Lancaster.
 
I-16 built in Germany, Poland, Yugoslavia, UK, France, USA, Sweden, Switzerland, Belgium, Japan, Canada, Australia, Spain, Italy, Czechoslovakia...
Retractable-wheel version of Ki-27 with Zuisei engine, 6 LMGs.
Fokker D.XXI powered by Twin Wasp (not Twin Wasp Junior), retractable U/C.
DH.77 designed around the RR Kestrel engine.
Bf 109 produced in USSR, France, UK, Italy, USA, powered by indigenous V12 engines.
Bf 109 with HS-12Y engine and MK 101/103 cannon, to be used as ground attack A/C.
P-36 powered by 2-stage supercharged R-1830.
Navalized P-36 instead the F2A.
Hurricane & Spitfire powered by Hercules engine, fighter-bombers.
Bristol Blenheim powered by Merlin.
Avro Manchester powered by R-2800s.
Gun-less Avro Manchester powered by Bristol Hercules.
A.W.27 Ensign is a bomber, not a transport aircraft.
A 'gun-less' Avro Lancaster.
I seem to recall that Fokker wanted the D.xxi to have retractable gear, but could not make it work on time or something.

Also do you know if there were ever experiments to see if the Hurricane/Spitfire could take a Hercules engine?
 

Driftless

Donor
I-16 built in Germany, Poland, Yugoslavia, UK, France, USA, Sweden, Switzerland, Belgium, Japan, Canada, Australia, Spain, Italy, Czechoslovakia...
Retractable-wheel version of Ki-27 with Zuisei engine, 6 LMGs.
Fokker D.XXI powered by Twin Wasp (not Twin Wasp Junior), retractable U/C.
DH.77 designed around the RR Kestrel engine.
Bf 109 produced in USSR, France, UK, Italy, USA, powered by indigenous V12 engines.
Bf 109 with HS-12Y engine and MK 101/103 cannon, to be used as ground attack A/C.
P-36 powered by 2-stage supercharged R-1830.
Navalized P-36 instead the F2A.
Hurricane & Spitfire powered by Hercules engine, fighter-bombers.
Bristol Blenheim powered by Merlin.
Avro Manchester powered by R-2800s.

Gun-less Avro Manchester powered by Bristol Hercules.
A.W.27 Ensign is a bomber, not a transport aircraft.
A 'gun-less' Avro Lancaster.

I especially like the bolded ideas
 
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