Down and right thrust
02-02-2008, 09:11 PM
#2
RE: Down and right thrust
You might.
Right thrust is common in general for most planes. How much depends on the setup. The designer may have found that down thrust made the plane handle a little better. I would fly it and see before I go trying to undo anything
Right thrust is common in general for most planes. How much depends on the setup. The designer may have found that down thrust made the plane handle a little better. I would fly it and see before I go trying to undo anything
02-02-2008, 09:17 PM
#3
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RE: Down and right thrust
KI8FR:
Is the airplane flying well and as it should be? Most aircraft, real and model have build in right thrust to offset engine torque effects. Expect anything from 1/2 to 3 % with 2 most common. Down thrust is a little unusual. If you are in a club, get with a pattern flyer a little. They spend half their life dialing in those things to mfg. specks. Saw one last year that called for 1/2% positive at wing, 1/2% negative at elevator. Not many guys out there that has the equipment to actually measure that closely. Anyway, if the thrust is off, its a factory goof, not that unusual. If you think its off based on flying, get some thrust plates from Hays, comes in 3 different sizes. Set upl plates to they can be inset easially, go to the field and play looking for improvement, never more than 2% at a time. You would probably get better results playing with the CG. 1/4" makes a big difference from stable to wild. Wild is not always bad. Before you start playing with anything, be sure it ballances side to side. ENJOY
Is the airplane flying well and as it should be? Most aircraft, real and model have build in right thrust to offset engine torque effects. Expect anything from 1/2 to 3 % with 2 most common. Down thrust is a little unusual. If you are in a club, get with a pattern flyer a little. They spend half their life dialing in those things to mfg. specks. Saw one last year that called for 1/2% positive at wing, 1/2% negative at elevator. Not many guys out there that has the equipment to actually measure that closely. Anyway, if the thrust is off, its a factory goof, not that unusual. If you think its off based on flying, get some thrust plates from Hays, comes in 3 different sizes. Set upl plates to they can be inset easially, go to the field and play looking for improvement, never more than 2% at a time. You would probably get better results playing with the CG. 1/4" makes a big difference from stable to wild. Wild is not always bad. Before you start playing with anything, be sure it ballances side to side. ENJOY
