Hi, Looking good! I fly an Ultra Cruiser with a Hirth F23 (50HP) engine. The engine weighs about 78 pounds. I'm not familiar with your engine. Could you give some specs for it and why you're using it in the Ultra Cruiser? Thanks!
The engine is an 84ci 4 cylinder engine from a military generator. It should make 42hp and be smooth and reliable. Has a nice sound too. It wont be 103 legal tho
@@flyguyeddy Thanks! Man, that's cool! You probably have already seen this but it shows a similar engine running in a bush plane: th-cam.com/video/xy8bBNqgcMc/w-d-xo.html Best of luck to you with the project!!
@@flyguyeddy I would like to see a 4a084 in a Hummelbird. Have you moved forward with this project? Seems like this engine would be a great candidate for a turbo as the compression ratio is very low (some specs say 6.8 CR) . Though in the Hummelbird there may not be enough room for all of the plumbing it would need for a turbo. One gentlemen Les Smoot has placed an SDS brand ECM on his 4a084 to have EFI, which he advises he is obtaining very good horsepower/performance out of the engine and is running a 58" 30 pitch prop. I plugged that prop with his claimed 3450 rpm's into a static thrust calculator equation and came up with some very high numbers for the 4a084 or 367 lbs of static thrust. I wonder what that would be like in a hummelbird (if you had the ground clearance for a 58" prop)? th-cam.com/video/EPLlVvehZ90/w-d-xo.html
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Hi, Looking good! I fly an Ultra Cruiser with a Hirth F23 (50HP) engine. The engine weighs about 78 pounds. I'm not familiar with your engine. Could you give some specs for it and why you're using it in the Ultra Cruiser? Thanks!
The engine is an 84ci 4 cylinder engine from a military generator. It should make 42hp and be smooth and reliable. Has a nice sound too. It wont be 103 legal tho
@@flyguyeddy Thanks! Man, that's cool! You probably have already seen this but it shows a similar engine running in a bush plane: th-cam.com/video/xy8bBNqgcMc/w-d-xo.html Best of luck to you with the project!!
@@flyguyeddy I would like to see a 4a084 in a Hummelbird. Have you moved forward with this project? Seems like this engine would be a great candidate for a turbo as the compression ratio is very low (some specs say 6.8 CR) . Though in the Hummelbird there may not be enough room for all of the plumbing it would need for a turbo.
One gentlemen Les Smoot has placed an SDS brand ECM on his 4a084 to have EFI, which he advises he is obtaining very good horsepower/performance out of the engine and is running a 58" 30 pitch prop. I plugged that prop with his claimed 3450 rpm's into a static thrust calculator equation and came up with some very high numbers for the 4a084 or 367 lbs of static thrust. I wonder what that would be like in a hummelbird (if you had the ground clearance for a 58" prop)?
th-cam.com/video/EPLlVvehZ90/w-d-xo.html