AHC: He 70-based military A/C

He 70 was a streamlined aircraft from the early 1930s. One of the 1st A/C with retractable U/C, as well as with wing without external supports/braces. RR exchanged 4 Kestrels for the He 70 so they can experiment with engine installations on high speed A/C, as we know RLM used Kestrels to power a host of prototypes in mid-30s that.
So - let's use the He 70 as base for full-blown military A/C, 1st by modifying some internal parts, made from Elektron, to use something less flamable. In Germany - make an actually useful dive bomber from He 70 (unlike the He 118)?
 

Driftless

Donor
Superficially, I compare the He.70 Blitz to the Fairey Battle. Both were elegant looking speedsters with modern features for their relative era - but they got technologically surpassed quickly.

Having damned the Blitz with faint praise...; I could imagine with some modifications that it could make a useful naval attack aircraft. With it's comparatively long range for the mid thirties, it would need to be built into the calculations for the British and French air defenses over the North Sea and the English Channel. The same considerations would apply to the Germans Baltic neighbors: Poland, Russia, Sweden and Denmark. Using the He.70 in the naval role might mitigate some of it's potential combat weaknesses, without going to a significant re-design. Maybe I'm underestimating what would be needed for that role though.
 
Battle (and/or Henley?) is probably as close as it gets. He 70 was roughly in-between size-wise between Henley and Battle. Speed was the same, despite the Battle having 50% more power. So the 'Merlinized' He 70 imediately sprins to mind.
The Hungarians acquired the He 170 - a He 70 with G&R 14K radial of 930 CV, 455 km/h. There were also He 270 produced as prototype, powered by DB 601 engine, 450 km/h.

So lets have, say, Vickers buying a license. UK has a better choice of engines in 1930 than probably any other country in the world. Moving away from Merlin as obvious choice, i'd try with Bristol Pegasus and Napier Dagger by mid-1930s, replacing as many biplanes as the monoplanes can be produced. The torpedo-bomber is an obvious spin-off, so is the RN/FAA version.
Version with 2-row radial produced in Canada and Australia, besides the UK, also Cyclone-powered type.
 

Wimble Toot

Banned
He70 Blitz used as engine test bed for Merlin by RR

He70%20001.jpg
 
Battle (and/or Henley?) is probably as close as it gets. He 70 was roughly in-between size-wise between Henley and Battle. Speed was the same, despite the Battle having 50% more power. So the 'Merlinized' He 70 imediately sprins to mind.
The Hungarians acquired the He 170 - a He 70 with G&R 14K radial of 930 CV, 455 km/h. There were also He 270 produced as prototype, powered by DB 601 engine, 450 km/h.

So lets have, say, Vickers buying a license. UK has a better choice of engines in 1930 than probably any other country in the world. Moving away from Merlin as obvious choice, i'd try with Bristol Pegasus and Napier Dagger by mid-1930s, replacing as many biplanes as the monoplanes can be produced. The torpedo-bomber is an obvious spin-off, so is the RN/FAA version.
Version with 2-row radial produced in Canada and Australia, besides the UK, also Cyclone-powered type.
Hungarians then their planes relocated to transport role sometimes in 1940/41.
Weren’t military variants of He-70 prone to fire after battle damage due to construction materials used?
 
Hungarians then their planes relocated to transport role sometimes in 1940/41.
Weren’t military variants of He-70 prone to fire after battle damage due to construction materials used?

I've covered the fire problems and possible solution for those in the 1st post here:

...
So - let's use the He 70 as base for full-blown military A/C, 1st by modifying some internal parts, made from Elektron, to use something less flamable.
...

Granted, by ~1940, protection for crew and fuel should be also installed.
 
How much of a weight penalty would be paid in switching from magnesium to aluminum or steel?

Al is around 33% heavier than Mg, but is half as stiff, so even thicker Al sections would be needed to keep the same strength
But all depends on what alloy used, as most aircraft alloys had copper for that
 
Al is around 33% heavier than Mg, but is half as stiff, so even thicker Al sections would be needed to keep the same strength
But all depends on what alloy used, as most aircraft alloys had copper for that

So we are looking at a substantial weight penalty then. That can only be overcome with engines of greater power.
 
thought the Japanese not base the Val off the He-70? So think of the Germans making a more refined and faster Val?
 

NoMommsen

Donor
thought the Japanese not base the Val off the He-70? So think of the Germans making a more refined and faster Val?
Not the "whole story".
The "Val" was a "inspired" more by the He 65 (otherwise unsuccessful predecessor of the He 70), a postal monoplane in the style of the Lockheed Orion (Heinkel and the japanes had quite ... close ties at that point of history).
The eliptical wing came later into the design, after the He 70.
 
Torpedobomber??? Here we go:

The Danish Navy considered buying He70 for use as a hydroplane (on floats) scout- and torpedobomber by 1937. Engine would be replaced by an AS Tiger IX 760 HP.
Estimated performances: speed 310-320 km/h /194-200 mph, range 1070 km /669 mi on 700 l fuel; apparently the aircraft had a 420 l tank in each wing so actual range would be slightly greater.
 
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Torpedobomber??? Here we go:

The Danish Navy considered buying He70 for use as a hydroplane (on floats) scout- and torpedobomber by 1937. Engine would be replaced by an AS Tiger IX 760 HP.
Estimated performances: speed 310-320 km/h /194-200 mph, range 1070 km /669 mi on 700 l fuel; apparently the aircraft had a 420 l tank in each wing so actual range would be slightly greater.

Oh that's a nice tidbit of information! A squadron or three of these could make things uneasy for invading ships. Were the floats to be detachable? Any details on why the deal fell through?
 
Oh that's a nice tidbit of information! A squadron or three of these could make things uneasy for invading ships. Were the floats to be detachable? Any details on why the deal fell through?

I guess the floats would be detachable those on the Dantorps were so in the end it might have been used as a land plane probably giving it a more economic take-off. There was no deal - it was a question of replacing the ageing Heinkel He 8 floatplanes. Either the He70 an up-engined He 8 or a homegrown design; all of which eventually came to nothing.

Here's a model of the beast:
407966250.jpg
 
thank
I guess the floats would be detachable those on the Dantorps were so in the end it might have been used as a land plane probably giving it a more economic take-off. There was no deal - it was a question of replacing the ageing Heinkel He 8 floatplanes. Either the He70 an up-engined He 8 or a homegrown design; all of which eventually came to nothing.

Here's a model of the beast:
407966250.jpg

Wonderful pic! Did you build this yourself?
 
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