Author Topic: Looking for Fancher flap horn (Read 642 times)

Matt Colan · « **on:** September 06, 2022, 06:14:22 PM »

I’ve started building my next NATS plane and I’m looking for a Fancher flap horn I could use in it. If nobody has it, would there be anyone out there willing to make the horn?

Picture of the flap horn I’m looking for attached

Thank you!

Doug Moisuk · « **Reply #1 on:** September 06, 2022, 06:34:45 PM »

Ok someone explain this to me.

Matt Colan · « **Reply #2 on:** September 06, 2022, 07:06:24 PM »

Quote from: Doug Moisuk on September 06, 2022, 06:34:45 PM

Ok someone explain this to me.

It’s to provide more linear controls

Jim Hoffman · « **Reply #3 on:** September 07, 2022, 09:51:47 AM »

To expand on Matt's correct reply.........

In the side view of a traditional stunter, notice that the push rod from the bellcrank to flap horn is not parallel to the thrust line and is far from perpendicular from a traditional flap horn. The horn in the sketch improves the linearity of the system by compensating for the bellcrank pushrod angle.

Howard Rush · « **Reply #4 on:** September 07, 2022, 11:05:21 AM »

To expand further: it doesn’t matter. You can get a linear response from either a bent-forward flap control horn or a straight flap control horn.

Author Topic: Looking for Fancher flap horn (Read 642 times)

Matt Colan

Looking for Fancher flap horn

Doug Moisuk

Re: Looking for Fancher flap horn

Matt Colan

Re: Looking for Fancher flap horn

Jim Hoffman

Re: Looking for Fancher flap horn

Howard Rush

Re: Looking for Fancher flap horn