Trim Tab Travel Limits

[mikeg]

Does anyone know what the elevator trim tab limits are for the under tail "flipper" trim tab for a BC-65 ?
Mikeg

[3Dreaming]

Re: Trim Tab Travel Limits

Mike, I have never heard of any limits for it. When I was flying my BL it was full nose up for approach, and full nose down for cruise. there wasn't enough for either position. Tom

[Howard Wilson]

Re: Trim Tab Travel Limits

Hi Mike,
Just looked at 20442. There are no fixed or adjustable stops in the system. The limiting factor is the bellcrank/thumb lever hitting the 1 3/8" landing gear v tube that it's mounted on. The cables are taut to about a bass D note. As usual Tom is right on about the effectiveness and use. h

[Hank Jarrett]

Re: Trim Tab Travel Limits

The last part of the trim is a little more pressure from your arms. Don't put in so many cranks on the trim lever you jamb the system. I really only use it to trim the pressure out at cruise or set it for trim for a go-around. The pressures aren't that high.
If you jamb the trim system at the stops the pressure starts getting kind of high after a half hour or so. ;-)
Hank

[3Dreaming]

Re: Trim Tab Travel Limits

The last part of the trim is a little more pressure from your arms. Don't put in so many cranks on the trim lever you jamb the system. I really only use it to trim the pressure out at cruise or set it for trim for a go-around. The pressures aren't that high.
If you jamb the trim system at the stops the pressure starts getting kind of high after a half hour or so. ;-)
Hank

Hank, he is talking about the flipper trim with the lever under the seat.

[mikeg]

Re: Trim Tab Travel Limits

Thanks guys.

[Hank Jarrett]

Re: Trim Tab Travel Limits

Sorry, didn't notice that. Same problem though. The trim runs out before the wheel pressure does. I am hoping with all the weight I pulled out of the tail of the 41 I won't run out of trim any more. CG on my plane was NO WHERE NEAR where the paperwork said it was! I will NEVER trust a W&B on a new plane without actually weighing it again.
Hank

That tail heavy it sure had "nice crisp" pitch control! I was WAY TOO CLOSE to uncontrollable.

[mikeg]

Re: Trim Tab Travel Limits

Sorry, didn't notice that. Same problem though. The trim runs out before the wheel pressure does. I am hoping with all the weight I pulled out of the tail of the 41 I won't run out of trim any more. CG on my plane was NO WHERE NEAR where the paperwork said it was! I will NEVER trust a W&B on a new plane without actually weighing it again.
Hank

That tail heavy it sure had "nice crisp" pitch control! I was WAY TOO CLOSE to uncontrollable.

Hank,
When you are rigging during the flight test phase, Wash the wings in or out to fly level, half tank of fuel with the trim tab centered with the elevator TE. You will have plenty of travel for nose up or down - or at least that has worked well for me with my '41 DeLuxe all these years. Makes the airplane faster also without the trim tab out of "trail". I also rig mine with wings level, no PAX and empty right wing tank as that is the way I fly it most of the time.
Mikeg

[Carrieve]

Re: Trim Tab Travel Limits

I use my trim (BC12D) for level cruise flight only. I have had the "run to the end of the screw" problem and it is not fun, especailly if I am not near home base. Makes for a long trip pushing or holding back all the way on the control to get home. Probably not really safe either.

[Forrest Barber]

Re: Trim Tab Travel Limits

Back to the flipper trim; there is no mention of limits on the TC 696 ; There are two cables , handle on one end flipper on other. USUALLY you need about 30 degrees each way. With a closed cowl you can run out of Nose Down trim, put a fixed tab on one Elevator so that the flipper is in neutral in cruise flight. Some have made the flipper a bit larger . Call me with any particular problem.