MANUAL FLAPS FOR 6 7 AND 9

[cjensen]

Originally Posted by gasman

Yes, all of the parts you will need will come from Vans. It is all about how to alter them to work better, and also to use with your existing elec flap weldment. It has a better leverage advantage than the orig part.

Warren

Warren,

I have (had) both weldments, and the only difference between the two is the length of the aft arms (well, that, and the forward arm being different to connect to the motor vs. your hand). The manual weldment aft arms being just over an inch longer. Is this what you are referring to for mechanical advantage?

[gasman]

Originally Posted by cjensen

Warren,

I have (had) both weldments, and the only difference between the two is the length of the aft arms (well, that, and the forward arm being different to connect to the motor vs. your hand). The manual weldment aft arms being just over an inch longer. Is this what you are referring to for mechanical advantage?

Yes, if all you now have is the manual weldment, i would cut the aft arms down to match the wd-613 EF as per dwg EF 6-1. They are 1 1/2" shorter. Then install the unit on the back side. It is much cleaner and easier to do.
I will have my mods here soon. They will make manual flaps nice if you have the space....... Butt space, remember!

Warrem

[gasman]

Originally Posted by Low Pass

I'm all about doing what you want, but I've never seen electric flaps inadvertently retracted abruptly ending up causing the plane to sink into the runway. Seen it done several times in planes with manual flaps. Just a point to consider.

2 cents

"In planes with manual flaps" Did you mean RV6's?
If you build flap anchor part# f-658A as per plans, this won't happen. Van made it simple and strong and easy to inspect.

Warren

[gasman]

MOONEY had retractable landing gear that was so reliable that the FAA did not require a back-up system.......... THEY WERE MANUAL!!!!

[Low Pass]

Originally Posted by gasman

"In planes with manual flaps" Did you mean RV6's?
If you build flap anchor part# f-658A as per plans, this won't happen. Van made it simple and strong and easy to inspect.

Warren

No - Piper. And by inadvertently, I mean the pilot intentionally raised the flaps on a go-around. Ended up dropping the plane to the runway from about 4-5'. Going from 45-deg flaps to 0 in less than a second is a radical change that not everyone can handle.

[gasman]

Originally Posted by Low Pass

No - Piper. And by inadvertently, I mean the pilot intentionally raised the flaps on a go-around. Ended up dropping the plane to the runway from about 4-5'. Going from 45-deg flaps to 0 in less than a second is a radical change that not everyone can handle.

If I recall, on a go around you apply full power and keep the nose down and then EASE the flaps off. I would do that in the "6" also. Flying is understanding the equipment.

If you need to apply max brake power, the flaps are gone in one second!!! Five seconds for electric flaps at 50 mph = 367 feet of max stopping power lost.

Warren

[Low Pass]

Originally Posted by gasman

If I recall, on a go around you apply full power and keep the nose down and then EASE the flaps off. I would do that in the "6" also. Flying is understanding the equipment.

If you need to apply max brake power, the flaps are gone in one second!!! Five seconds for electric flaps at 50 mph = 367 feet of max stopping power lost.

Warren

Yes. Supposed to. But I have seen people get flustered and retract the flaps too quickly on a go-around. Has happened with me in the right seat as CFI. Happened so fast I couldn't grab the bar. All I could do is grab the yoke and get the nose up as the plane hit the runway.

My original point was to show that it is possible to retract flaps with a manual arrgt very quickly - for better or worse.

[BobB]

I am interested. RV-7a.