Hello engine guys (girls)
I'm building a new version of the F1 Rocket. A 4-Cylinder Rocket now being named the F4 Raider. But, here is my question? Which 4 Cylinder might be best for higher altitude cruising? I have just about decided on using a Turbo-Normalized Lycoming, but have second thoughts for a number of reasons.
I like the idea of flying up around 15-16,000', with O2, and get long range cruising, hopefully at 70-75% power. There are lots of turbo'd air cooled engines to choose from, but the question is which might be best for the F4 Rocket?
Considerations are: 1) weight, including turbo and required waste gate and exhaust. 2) Horsepower , at 14, 15, 16 thousand feet
3) Fuel Burn, Using a TN-4 cylinder should (yes?) result in fuel savings over the 6 cylinder normally aspirated Lycoming 4) Cost, maybe I should have put this first.
I'd like to see sea level HP of around 210 (75% of that T-normalized at altitude) but what about configuration and weight? If it ends up to about the same as a 6 cyl Lycoming in weight, I wonder if I would be better off doing a 6 cyl normally aspirated Lycoming instead?
Thanks for your thoughts and advice
Ron
Currently flying an RV-4 with 204HP angle valve IO-320.
I'm building a new version of the F1 Rocket. A 4-Cylinder Rocket now being named the F4 Raider. But, here is my question? Which 4 Cylinder might be best for higher altitude cruising? I have just about decided on using a Turbo-Normalized Lycoming, but have second thoughts for a number of reasons.
I like the idea of flying up around 15-16,000', with O2, and get long range cruising, hopefully at 70-75% power. There are lots of turbo'd air cooled engines to choose from, but the question is which might be best for the F4 Rocket?
Considerations are: 1) weight, including turbo and required waste gate and exhaust. 2) Horsepower , at 14, 15, 16 thousand feet
3) Fuel Burn, Using a TN-4 cylinder should (yes?) result in fuel savings over the 6 cylinder normally aspirated Lycoming 4) Cost, maybe I should have put this first.
I'd like to see sea level HP of around 210 (75% of that T-normalized at altitude) but what about configuration and weight? If it ends up to about the same as a 6 cyl Lycoming in weight, I wonder if I would be better off doing a 6 cyl normally aspirated Lycoming instead?
Thanks for your thoughts and advice
Ron
Currently flying an RV-4 with 204HP angle valve IO-320.
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