- Joined
- Jun 7, 2009
- Messages
- 51
Finishing up last welding steps on the fuselage, and another big decision to make is to pick a final tail height. Given that I'm 6'2" I anticipate having to raise the turtledeck an inch or two to accommodate torso height which per longstanding best practice also increases tail height by the same amount.
That said, my plan is to go with a Rotax engine and at least per my best initial estimate a 64 inch propeller. Per previous feeds, I'm pretty sure this will still give adequate ground clearance versus the typical 52-54" prop on a Sonerai. That said, still need to maintain yaw stability with a bigger prop. Agricultural engineering approach would say to increase tail height by the increase in propeller radius - 5 inches in this case - to maintain same height of tail in "clean" air above propeller slipstream. I know others have had to increase tail height to accommodate Jabirus and/or other engines, so am looking for a quick check on my thought process.
That said, my plan is to go with a Rotax engine and at least per my best initial estimate a 64 inch propeller. Per previous feeds, I'm pretty sure this will still give adequate ground clearance versus the typical 52-54" prop on a Sonerai. That said, still need to maintain yaw stability with a bigger prop. Agricultural engineering approach would say to increase tail height by the increase in propeller radius - 5 inches in this case - to maintain same height of tail in "clean" air above propeller slipstream. I know others have had to increase tail height to accommodate Jabirus and/or other engines, so am looking for a quick check on my thought process.