Alternate history of Heinkel 177

[airman]

What if Heinkel 177 were designed with four independent engines just like Piaggio 50 I ?

 

[Rule of cool]

The Germans built nearly 1200 troublesome 177s.

If the 4 single engines make the 177 trouble free how many would they make? What sort of bomber force would these numbers build up? What sort of impact would such a bomber force have?

 

[Michel Van]

The issue with He 177 was the Luftwaffe wanted it as dive bomber
This let to configuration with two paired engines.

Had they drop that insane idea from begin, The Luftwaffe had good bomber.
it would look more like He 274 with it four engines

 

[Apophenia]

The issue with He 177 was the Luftwaffe wanted it as dive bomber
This let to configuration with two paired engines...

He 177 designer Siegfried Günter had already produced an aircraft powered by conjoined Daimler Benz engines - the He 119 (designed with his brother Walter). That DB 606 powerpack had been chosen because it greatly reduced frontal area. It had nothing to do with divebombing.

However, the RLM's universal requirement for bombers - regardless of how large - to be capable of dive bombing did create multiple problems for the He 177. Mainly, it dictated a stronger and thus heavier structure. In an attempt to save weight elsewhere, Günter had omitted firewalls. The close-packed engine pairs readily overheated and, under service conditions, leaked oil and fuel. The rest we know all too well ...

Its not clear to me that the push-pull arrangement of the Piaggio P.50-I would have made any great improvement. The engines are still fairly closely-packed and there is even less space for a sensibly-arranged main undercarriage. But the tandem propellers of the P.50-I also greatly limited the arcs of defensive weapons - much as the props on your push-pull He 177 would have done - especially for the use of the Heinkel's remote barbette.

Casiraghi solved the push-pull issue by providing the Piaggio P.50-II with four separate engines. Designed from scratch, the He 274 would doubtless have had its main undercarriage retracting into the inboard nacelles - making for a shorter, lighter gear while freeing up wing space for fuel.

 

[Justo Miranda]

A Heinkel He 177 equipped with BMW 801 engines would have been useful during the Battle of the Atlantic and in deep raids into Soviet territory to dismantle industries beyond the Ural Mountains, but it would have stood no chance against the British defenses of 1942.

A pressurized version equipped with DB 603 engines could have been built, but it would have been detected by Chain Home radars and intercepted by Spitfires HF Mk. VII or Mosquito HF XV.

 

[sienar]

However, the RLM's universal requirement for bombers - regardless of how large - to be capable of dive bombing did create multiple problems for the He 177. Mainly, it dictated a stronger and thus heavier structure. In an attempt to save weight elsewhere, Günter had omitted firewalls. The close-packed engine pairs readily overheated and, under service conditions, leaked oil and fuel. The rest we know all too well ...

In his biography "Stormy Life", Ernst Heinkel places most of the blame for the He-177s on Heinrich Hertel. It was allegedly him who was responsible for the engine/spar placement, undersized control surfaces, weak spar, ect. with Günter subordinate and Heinkel himself preoccupied.

 

[airman]

The issue with He 177 was the Luftwaffe wanted it as dive bomber
This let to configuration with two paired engines.

Had they drop that insane idea from begin, The Luftwaffe had good bomber.
it would look more like He 274 with it four engines

Obviously : my post was inspired by Piaggio 50 I four engine bomber configuration. It's configuration

The Germans built nearly 1200 troublesome 177s.

If the 4 single engines make the 177 trouble free how many would they make? What sort of bomber force would these numbers build up? What sort of impact would such a bomber force have?

I think that a free trouble engines Heinkel 177 could have more impact than real impact . It could relayed the defeat of Germany.

 

[NOMISYRRUC]

I found a book called "Heinkel HE 177, 277, 274" by Manfred Griehl & Joachim Dressel on Internet Archive looking for something else. It might have information in it that's pertinent to this thread.

 

[Justo Miranda]

I found a book called "Heinkel HE 177, 277, 274" by Manfred Griehl & Joachim Dressel on Internet Archive looking for something else. It might have information in it that's pertinent to this thread.

Hi

 

[Justo Miranda]

Some additional info here

 

[Justo Miranda]

Post-2

 

[Justo Miranda]

Post-3

 

[NOMISYRRUC]

Hi

I am nonplussed.

Some additional info here

Post-2

Post-3

Most of the text in the above is French and German. FWIW the book I found is an English translation of a book written in German.

 

[Justo Miranda]

I am nonplussed.




Most of the text in the above is French and German. FWIW the book I found is an English translation of a boog written in German.

The texts I have included belong to other publications that I keep in my archives

 

[NOMISYRRUC]

The texts I have included belong to other publications that I keep in my archives

I am still nonplussed.

 

[NOMISYRRUC]

The He177 was begun at about the same time as the British heavy bombers built to Specifications B.12/36 and P.13/36.

14.05.39 first flight of the Short Stirling.​

It entered service (with No 7 Squadron, RAF) in August 1940 – 15 months later.​

Its first operation was a raid on Rotterdam on the night of 10th-11th February 1941 – 21 months after its first flight.​

​

27.07.39 first flight of the Avro Manchester.​

It entered service (with No 207 Squadron, RAF) in November 1940 – 16 months later.​

Its first operation was a raid on Brest on the night of 24th-25th February 1941 – 19 months after its first flight.​

​

25.10.39 first flight of the Handley Page Halifax.​

It entered service (with No 35 Squadron, RAF) in December 1940 – 14 months later.​

Its first operation was a raid on Le Havre on the night of 11th-12th March 1941 – 17 months after its first flight.​

That’s an average of 15 months from first flight to service entry and 19 months from first flight to first operation. 2 prototypes of each aircraft were built.​

19.11.39 first flight of the Heinkel He177 – according to the Putnams on German Aircraft of the Second World War . . .

8 He177 prototypes (V1 to V8) were purpose built and the other 16 (V9 - V24) were conversions of pre-production & production aircraft.​

Some He177A-1s were delivered to I./KG40 in July 1942 for operational trials and on 28.08.42 . . . “one of them dropped a single 250kg (550lb) bomb on the Broad Water district of Bristol, killing 45 people and injuring a further 66—the worst single bomb incident suffered by the city during the war.”​

If its development had proceeded as smoothly as its British rivals service entry (probably with KG40) would have been in April 1941 (15 months after its first flight) and its first operation would have been in August 1941 (19 months after its first flight).

However, the interval between first flight and service entry might have been reduced because 8 He177 prototypes were built instead of 2 each of the British heavy bomber prototypes so the development flying might have been completed sooner. And the first flight might have been several months earlier ITTL due to the change of engines.

 

[NOMISYRRUC]

Some "Aircraft Top Trumps" using "Hitler's Luftwaffe" by Tony Wood and Bill Gunston



Unfortunately the performance statistics aren't easily comparable because the maximum speeds are at different heights and the maximum ranges are with different loads.​

 

[tomo pauk]

Unfortunately the performance statistics aren't easily comparable because the maximum speeds are at different heights and the maximum ranges are with different loads.

How reliable are their figures for the DB 603A-powered 177s/274s?

 

[NOMISYRRUC]

How reliable are their figures for the DB 603A-powered 177s/274s?

Haven't the foggiest! They're similar to the figures in the Putnams on German Aircraft of the Second World War.

He177B (which it and the Wood & Gunston book call the He277)​

48,069lb empty weight​

98,105lb maximum loaded weight​

354mph maximum speed at 18,701ft​

302mph maximum speed at Sea Level​

286mph cruising speed at 17,717ft​

49,215ft absolute ceiling​

3,728 miles maximum range​

He274​

46,966lb empty weight​

79,380lb loaded weight - it says "loaded weight" not "maximum loaded weight" like the He177B​

360mph maximum speed at 36,091ft​

267mph maximum speed at Sea Level​

248mph cruising speed at Sea Level​

46,918ft absolute ceiling​

1,770 miles normal range​

​

I haven't the foggiest whether they're reliable either.