Henni van Rooyen wrote:
> What was your experience with your split flaps? I intend to make
split flaps on the inboard wings only, all the way to the rear spar. I
found a nice picture where another builder did same & it's really easy
to make.
Split flaps work great! I chose split flaps precisely because they ARE
very high drag...which is exactly what you need to slow a slippery KR
down while landing. Mine are large chord (20%) and long (54" each on
the outboard wings), and I'd certainly not call them "too much
drag"...they slow you down, and provide more lift for that slower
landing. But I only have 1130 hours on mine, along with several
thousand landings, so I'm just getting started here. I've done
go-arounds and left the flaps down, but it doesn't take long to figure
out why the climb rate is suffering (down to ONLY 500 ft/min with a
Corvair), and retracting the flaps fixes that situation in a hurry.
Even with a VW, it will gain speed and climb nicely, so it's not like
you're going to simply run off the end of the runway at full power.
Having said that, I'm also a convert to the belly board concept, having
installed one on N891JF. That works fine too. You get just as much
board area as a two smaller flaps on the stub wings, there's no danger
of a "split flap situation" where one is down and the other isn't, and
it's far simpler to implement, especially after the plane is already built.
See http://www.n56ml.com/n891jf/speedbrake/ and
http://www.n56ml.com/owings.html .
Mark Langford
m...@n56ml.com
http://www.n56ml.com
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