The Murphy Builders Site

Hi Bill !

Yes - I would do the same if stuck with a flaps-only Rebel !
I've flown a few ... one builder told me his was a STO --
no "L" , (not a STOL) since he found it hard to land short ! :-)

Fortunately, there are very few of those --- and a good thing too....
you end up with half the flap and half the aileron - not good for
landing, or crosswinds ! :-( Most who try that setup switch
back to flapperons quickly - I certainly would !

I use full flapperon because the design is to change the
shape of the whole airfoil, as high performance gliders
have been doing for many years. I love the Rebel's roll rate ! :-)
2 notches of negative flapperon really helps the cruise too...
you don't get the same gain with just flaps - if you even have
negative.

One thing I often see is the dangerous practice of having
the separate flaps droop more than the factory defined
maximum of 18 degrees (same as for flapperons). Anything
more puts excessive load on the 2 flap(peron) support arms -
they might rip off !!! You can see this excess flap on some
YouTube videos of the float Rebels in Newfoundland - they are
the only ones still doing this regularly, at their own peril ...

The Elite has much sturdier flaps, AND --> THREE supports,
so can have more deflection. Still could use more aileron -
Just MHO ... ;-)

--
......bobp
bobp@prosumers.ca
http://www.amway.ca/BobPatterson
http://bpatterson.qhealthbeauty.com
http://apatterson2.ordermygift.com

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On July 18, 2010 03:12:42 am Bill Maxwell wrote:

Do you have a similar routine for the flapped version, Bob?

Bill

Bob Patterson wrote:

Congratulations Ron !!

Sounds like you have a lot of fun flying ahead !!

The performance sounds great !

FWIW - I won't fly a Rebel with less than 27 degrees of UP

elevator .... and always take off & land with full (3notches)
flapperon - ease up to 2 notches for climb above 200 ft...
That should help your landings - not that they worked out
badly !

To the others - "Keep rivetting - it IS worth it !!"

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Thanks for that input Bob. I'll certainly file that away for future
reference.

I bought the separate flaps option with my kit, I guess only because
that had been my previous experience base, whereas flapperons were
something I had never experienced. Still plenty of time in which to
switch back to flapperons though and that is where my thinking has been
tending over the past couple of years. Your comments reinforce that view.

I certainly want the "L" back in STOL down here in Tasmania


Bill

Bob Patterson wrote:

Hi Bill !

Yes - I would do the same if stuck with a flaps-only Rebel !
I've flown a few ... one builder told me his was a STO --
no "L" , (not a STOL) since he found it hard to land short ! :-)

Fortunately, there are very few of those --- and a good thing too....
you end up with half the flap and half the aileron - not good for
landing, or crosswinds ! :-( Most who try that setup switch
back to flapperons quickly - I certainly would !

I use full flapperon because the design is to change the
shape of the whole airfoil, as high performance gliders
have been doing for many years. I love the Rebel's roll rate ! :-)
2 notches of negative flapperon really helps the cruise too...
you don't get the same gain with just flaps - if you even have
negative.

One thing I often see is the dangerous practice of having
the separate flaps droop more than the factory defined
maximum of 18 degrees (same as for flapperons). Anything
more puts excessive load on the 2 flap(peron) support arms -
they might rip off !!! You can see this excess flap on some
YouTube videos of the float Rebels in Newfoundland - they are
the only ones still doing this regularly, at their own peril ...

The Elite has much sturdier flaps, AND --> THREE supports,
so can have more deflection. Still could use more aileron -
Just MHO ... ;-)

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I have the separate flap mod and I like it . I have no problems landing short and I have the negative flap.