Steve,
I put a complete cable control system in my KR-2 per the RR plans. I did not
like the plain bolt hinges at the aft spar bell cranks, so I put in aeliron
bearing hinges. The right-angle brackets at the aft and forward spars were
sort of wimpy, but were okay for the 40 lb-tension cable system. RR offered a
push rod for the elevator connection under the seat; I put that in and it was
off to the races. I took out all the cables, pulleys and attach brackets. I
bent 6061 sheet to form triangular attach brackets, made 90-degree bell cranks
with aeliron bearings for the forward spar, a counter-weight bell crank idler
to balance the elevator, and six additional control tubes. I retained the
original center control stick and rudder cables. N6242 shed 6 lbs in the
process, mostly substituting aluminum for five brass turnbuckles, safety wire,
associated hardware plus steel cables.
I don't have a website to show you pictures, but I would be glad to discuss it
off-line. Don't have any flight results yet, maybe in a year or so. Were I to
do that again, I would put the forward spar bellcranks inboard under the seat
and run the control tube diagonally through the stub wing to the aft spar
bellcrank mounted on the front of the aft spar. The 90-degree bellcranks would
need modification to account for the diagonal control tube angle through the
stub wing.
Sid Wood, KR-2 N6242
[email protected]
-----Original Message-----
Any one got a web page out there on a design of using tubes instead of
the cable system?
Steve McGee
Endeavor Wi. USA
Building a KR2S widened.
[email protected]
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