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Re: PIK20 rebuild

Posted: 16 May 2019, 20:33
by Peter Balcombe
Gordon,
In that case, it seems to be halfway between a b & d version as per the PT original design.
The tailplane overlaps by about 12mm, so around 50mm on full size ;)
The rudder stops below the elevator & the top front of the rudder is slightly scalloped to provide elevator TE clearance.
I wouldn’t be surprised if Pat based his design on a b version & enlarged the tailplane slightly to improve handling.

Re: PIK20 rebuild

Posted: 17 May 2019, 13:21
by Peter Balcombe
A view of the original PT PIK20 build instructions versus the fin top part of my CAD plan.

Re: PIK20 rebuild

Posted: 17 May 2019, 20:13
by GeeW
Plan fuz is definitely a 'd model. L/e position relative to edge of canopy frame line gives it away.

Re: PIK20 rebuild

Posted: 21 May 2019, 20:38
by Peter Balcombe
Ok, on with the elevator servo & linkage installation.
I made up a simple cardboard template to hold the servo & bellcrank plates in the correct position relative to the rear of the fin, fitted the servo to its plate & the bell crank to its plate & used the jig to make up the pushrods to correct length.
The jig card was then reduced to minimum size to register the plates when these were taped in, then Polyester resin applied to the bottom of the plates before placing the jigged assembly into the fin & aligning the jig with the fin rear edge.
A piece of spruce used to hold the side of the fin straight & a couple of temporary wedges to hold the plates down whilst the resin cured - job done :)

Re: PIK20 rebuild

Posted: 30 May 2019, 21:40
by Peter Balcombe
Rudder now in place and the flap & aileron made for the 2nd wing.
All flying surfaces about ready to be glassed.
MPX wing connector harnesses made up & ready to be bonded into the fuselage wing root.
Time to get on with the canopy.