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Re: Flap setting for take off


 

My flap settings measure 14,29, and 40 degrees. I have a interconnect spring between the flap controls and elevator controls so there is no control force change as the flaps are extended. Trim it flaps up at 90 or so on downwind and it is still in trim with flaps down on final. Not sure how that could be done on a W8 as the elevator horn is oriented down vs up on the W10 which reverses some of the control mechanism

On Thursday, January 23, 2025 at 08:18:09 AM MST, Joe Norris via groups.io <joepilot13@...> wrote:


Thanks for the great input Keith.? Good info.

I have not tried two notches for takeoff on my Tailwind yet.? Might give it a go when I get back up north in the spring, just to see how it does compared to my usual one-notch takeoff.?

As you can tell by my comments, my plane has three notches of flaps.? I have not actually measured the deflection, so I am not sure whether it is 10,20, and 30 degrees or some other increments.? Another project for the spring!?

As an aside, I cannot get full flaps in flight.? Due to the geometry of the flap lever combined with my arthritic right shoulder, I just don't have the muscle or leverage to get that third notch, even when slowed down to pattern speeds.? So as a result I have been landing with the second notch, which works just fine.? But it would be interesting to see what full flaps does.?

The other thing about my plane is that the trim is not nearly strong enough to balance out the nose-down pitch change when adding flaps.? Full nose up trim and I still have to hold a lot of backpressure on the stick in order to stay on speed.? I am sure it would be even worse with full flaps.? Not hard to control, just a bit of a workout.? I guess I can use the exercise, so no worries.?

Joe


On Thu, Jan 23, 2025 at 6:09?AM Keith Klos via <kloskeith=[email protected]> wrote:
Ray,
I can't remember if I had tried 2 notches.? I want to say that I did and it really didn't help anything.? I think that perhaps after you get past 1 notch it is just pretty much all drag.? ? ?I will try it next time I fly and see what happens.? ? I almost always land with full flaps even in a strong crosswind.?
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As an aside I have tried "reflexing" the flaps in cruise flight to see the effect.? ?Some claim that on some airplanes reflexing the flaps a little will increase speed.? ? ?I can say that it definitely does NOT add speed to my airplane.? When I built my plane my flap linkage allowed so that I could get about 1+ degree or so (guessing) of reflex. I did not create another hole in the arm but rather can just hold the flap lever down.? Before I put in the AP? I would try it but wasn't able to really tell cause it would change the angle of attack slightly and then I would be all over the place in altitude so it was hard to tell the effect.? ?After I installed my AP and can set altitude hold,? ?I have tried it and it slows me down a couple of knots when I reflex the flaps.? It was an interesting experiment.
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There were a number of other threads about this some time ago
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Keith

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