birdy
Active Member
- Joined
- Mar 19, 2004
- Messages
- 7,066
- Location
- Alice Springs-central Oz.
- Aircraft
- open frame single seat & a 'wasa' RAF, among other types.
- Total Flight Time
- 7000 odd, bout 5000 gyro
Its things like this that make me feel like a simple cow grower.
[to cut a long story short] i figured the little annoyn stick shake i used to get with the 28'ers on the wasa at max TOW was coz the teeter bolt was set too high, coz it was worse the more it weighed. [ duh]
Before i test flew it with the new teeter bolt position [ bout 2" closer to the hub bar] i thought the only flyn related thing i mite notice would be the cyclic force required could be higher. Didnt think itd make the slightest difference to performace coz all i did was effectivly lift the center of lift in relation to the head/ pitch and roll pivots.
Things were lookn good as they spun up, smooth as silk, and wen i broke ground it was orgasmic. Not the slightest hint of shake.
As i backed off to cruise power i noticed it was way outa trimm.
As i was feedn the spring sum slack i though "yeh, that will change too........., but why am i feedn it slack?"
If the COL is further away from the pitch pivot, it has more leaverage over the trimm spring, but it must have less, coz iv had to winde the trimm rite off, and still need to hold the stick forward.
???????????????????
If the COL is moved further from the pivot point, the spring would have less leaverage/ effect, so id should be winding it in, not out.
Shouldnt i ???????
Wot am i missn?
Cant be the RTV, coz its only moved along its own thrust line.
[to cut a long story short] i figured the little annoyn stick shake i used to get with the 28'ers on the wasa at max TOW was coz the teeter bolt was set too high, coz it was worse the more it weighed. [ duh]
Before i test flew it with the new teeter bolt position [ bout 2" closer to the hub bar] i thought the only flyn related thing i mite notice would be the cyclic force required could be higher. Didnt think itd make the slightest difference to performace coz all i did was effectivly lift the center of lift in relation to the head/ pitch and roll pivots.
Things were lookn good as they spun up, smooth as silk, and wen i broke ground it was orgasmic. Not the slightest hint of shake.
As i backed off to cruise power i noticed it was way outa trimm.
As i was feedn the spring sum slack i though "yeh, that will change too........., but why am i feedn it slack?"
If the COL is further away from the pitch pivot, it has more leaverage over the trimm spring, but it must have less, coz iv had to winde the trimm rite off, and still need to hold the stick forward.
???????????????????
If the COL is moved further from the pivot point, the spring would have less leaverage/ effect, so id should be winding it in, not out.
Shouldnt i ???????
Wot am i missn?
Cant be the RTV, coz its only moved along its own thrust line.