I have been working to resolve a
problem for more than a month now and thought I would query the group for a
possible solution.
If anyone else is running (or
planning to run) a 3-blade M/T electric prop with the RD-2C gearbox, I have
discovered a mating problem in using this prop/gearbox combination for my
20B. The problem is the RD-2C prop flange comes with 3/8 id x 5/8 od
bushings. The M/T prop has a stepped hole that is ¾” for the first 3/32”
and then goes to 5/8”. Tracy is not comfortable with drilling out
the 5/8” bushings and M/T adamantly advises against using anything less than
½” prop bolts with this prop. So, I’m at a standstill until I can get
this resolved. The only solution I can see is to press out the existing
bushings and open up the holes to accept ¾” od x ½” id bushings. But
that would require disassembly of the gearbox and some precision machine work,
possible but not my first choice.
Mark
S.
Lancair ES –
20B
(with a very pricey lawn
ornament)