Rowland,
I would certainly agree with you on the 'careful reaming'. I did mine
likewise and I hope I never have to get them out because they're tighter
than a camel's a**e in a sandstorm!
My original 1/4" pins, on the other hand, were rather less so...
Regards,
Jeremy
Jeremy Davey
Europa Monowheel 537M G-EZZA
Europa Club Vice-Chairman, Webmaster, PFA NC Representative
PFA EC Member
If you can keep your head when all about you are losing theirs, then it is
possible you haven't grasped the severity of the situation.
Tail done
Standard XS wings with mods underway
CM installed in fuse (with airbrakes fittings)
1400 build hours to date
Intended fit:
Rotax 914 turbo, Airmaster CS fully-feathering prop
Lots of lights, buttons, switches, gizmos, and alarms
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of Rowland Carson
Subject: Europa-List: torque tube pins [was: no subject]
>You can't use taper pins, they will distort the tube and that will cause
>friction in the bearings.
Graham - never say never ... John Scott at Cambridge told me he has
fitted AN taper pins to at least one Europa in place of the original
1/4" parallel pins (TP14A & TP14B). This builder was among the folk
who observed that the holes in the torque tube were not very snug on
the original pins from day 1, and John's change was made before the
torque tube entered service. I certainly felt that my own fairly
cautious reaming of the holes for the replacement 3/8" pins (TP14C &
TP14D) gave a better fit than the original. John's taper pin approach
seems better engineering and I'm not convinced that if correctly
fitted they will cause distortion. If I'd heard of it sooner I'd have
gone for that myself rather than the 3/8" pins.
>Only alternative I can think of is expandinhg pins
That also seems quite neat; but how do expanding pins avoid the
distortion problem you fear with taper pins?
regards
Rowland
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