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HomeAircraftHelicopterThunder TigerOther › 90se tail drop
02-11-2006 03:16 PM  12 years agoPost 1
Saxie

rrNovice

Cape Town, South Africa

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Today I noticed for the first time that during a hover my raptor 90SE's tail would drop - like I was giving elevator up (nose up) input. Previously it would hover rock solid for a second or so hands off the cyclic. I checked my TX trims, subtrim, mixes, everything is the way it was before. I did replace the main gear with the 91 tooth (so I had the head off) but I checked my swash is as level as can be from all sides at both high and low pitch. My headspeed is very low at the moment - probably below 1500 - but I'm still running in the engine and have the governor disabled and the engine slightly rich. There are also no vibrations either. Any ideas?

thanks
Werner

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02-11-2006 04:58 PM  12 years agoPost 2
BlakeMcBrayer

rrElite Veteran

Georgetown, Ky

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Were you facing the wind? This can cause what your speaking of.

As for the swash being level, this is sort of not important past the bench setup. When your building/repairing, you set up your servos and linkages to have a level swash on the bench.

Once the heli is flying, you will need to adjust trim/sub-trim so that the heli hovers stable with little input.

Even though the swash may be level, you need to trim adjust for factors like CG, tail rotor thrust and other forces that act on the heli.

.

Don't come off the throttle untill you see your GOD!

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02-11-2006 05:04 PM  12 years agoPost 3
Saxie

rrNovice

Cape Town, South Africa

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The wind was fairly strong and hitting the heli from the front left side. I flew it just last weekend in similar strong windy conditions but with the wind head on and this didn't happen then. I will take it out again tomorrow to see whats up.

thanks for the reply
W

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