BMW VI: 510 kg (1,124 lb) 740hp thus 1.45 hp/kg
DB 603: 920 kg (2,030 lb) 1,726 hp thus 1.87 hp/kg
DB 605: 756 kg (1,667 lb) 1,455 hp thus 1.92 hp/kg
Jumo 213: 1040 kg (2,072 lb) 2,022 hp thus 1.94 hp/kg
DB 601: 600 kg (1,323 lb). Tested on He 270 V1, a Heinkel proposal to overhaul and re-engine He 70Fs. 1,158.9 hp thus 1.93 hp/kg
Random idea: turboprop testbed
Torpedo bomber?
Adding in the rough powers to below and power to weight ratios (for engines):Testbed for HA-1112 merlin installation?BMW VI: 510 kg (1,124 lb) 740hp thus 1.45 hp/kg
DB 603: 920 kg (2,030 lb) 1,726 hp thus 1.87 hp/kg
DB 605: 756 kg (1,667 lb) 1,455 hp thus 1.92 hp/kg
Jumo 213: 1040 kg (2,072 lb) 2,022 hp thus 1.94 hp/kg
DB 601: 600 kg (1,323 lb). Tested on He 270 V1, a Heinkel proposal to overhaul and re-engine He 70Fs. 1,158.9 hp thus 1.93 hp/kg
Another idea derived from the Kestral mention would be a post war Spanish version re-engined (ala HA-1112 and CASA 2.111) version using a 1,600 hp Rolls-Royce Merlin 500. This would have a power to weight ratio for the engine of roughly 2.15hp/kg. It would also remain a degree of commonality for support with the other tow platforms.
(https://ww2aircraft.net/forum/attachments/avc_00291256-jpg.685722/)
estbed for HA-1112 merlin installation?
Testbed for HA-1112 merlin installation?
A quickie retouch ... Hispano Aviación S.A.'s Heinkel He 70M ([i[Merlin[/i]) testbed conversion.
I wonder if the one owned by Rolls-Royce ever flew with a merlin?
Torpedo bomber?
That could work. If you compare the He 70F with the near-contemporary Douglas TBD-1, wing areas and empty weights are roughly comparable. (Assuming that the Heinkel torpedo-bomber is not also a carrier aircraft, I don't think that 2.7 m2 less wing area would signify.) MTOW suffers on the Heinkel mainly due to the lower-powered and much heavier BMW VI engine.
The He 170A's WM-K-14 put out slightly more power than the Devastator's R-1830-64. For German service, substitute a roughly-equivalent Bramo Fafnir or BMW 132.
BTW, for Rickshaw[/b]'s Remember Eureka story, I used the He 270 as the basis for a floatplane torpedo-bomber.
-- https://beyondthesprues.com/Forum/index.php?topic=351.msg19416#msg19416
Would the He 70/170's wooden wing be able to take the stress of being a torpedo bomber?
As designed it's a doubtful proposition as it wasn't stressed for that sort of role, the He 170
was a so-so military aircraft because of the design origin as a lightweight, high-speed airliner.