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Thorpe F-20 build

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Old 01-25-2012, 03:31 PM
  #176
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Default RE: Thorpe F-20 build

Great to here Pete is doing well...
Any chance of Sending me Pete's phone number via PM. I sure could use a canopy.
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Old 01-25-2012, 03:38 PM
  #177
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Default RE: Thorpe F-20 build

Thanks Dave. Keep us advised on the parts. I could use some canopys for a F104 and the F20. Maybe he would like to set up a distribution entity in the US for plans and plastics.
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Old 06-19-2012, 06:21 PM
  #178
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Default RE: Thorpe F-20 build

OK. So now back to the F-20. Had a pipe left over from a Yellow Starfire that never got used. Cut it down with a dremel tool with cutoff wheel. Then made L shaped brackets from the cutoff piece.
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Old 06-21-2012, 02:07 AM
  #179
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Default RE: Thorpe F-20 build

Wheels and brakes came in. Made a combination engine/ pipe mount and worked to get it lined up and true to the plane.
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Old 06-22-2012, 01:47 PM
  #180
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Default RE: Thorpe F-20 build

A few more pics of the engine and pipe mounting...
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Old 06-23-2012, 05:37 AM
  #181
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Default RE: Thorpe F-20 build

Didn't like mounting the pipe under the motor mount so I added a doubler to put the screws in from the top. Will also give more for the engine mounting screws to go into.
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Old 06-23-2012, 05:43 AM
  #182
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Default RE: Thorpe F-20 build

Started digging out the mounts for the retracts. Used dimension from the plans and made a starter hole with a dremel tool and sanding drum. Then made the hole bigger until I could determine where I was at. Saves making the wheel opening for last. Retracts are Spring Air 5/32 wire struts. I ordered 3/16 but received 5/32. Oh well. I am sure they will work.
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Old 06-23-2012, 05:47 AM
  #183
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Default RE: Thorpe F-20 build

Then dremel out for the wheel wells...
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Old 06-23-2012, 05:51 AM
  #184
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Default RE: Thorpe F-20 build

A few final touches, sanding here and there for clearance and free retact motion and done...
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Old 06-23-2012, 06:46 AM
  #185
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Default RE: Thorpe F-20 build

The front retract was more difficult. Since I wanted to use the sigle side steering version, the rails are higher. This created an interference with the servos and the wheel when retracted. Had to relocate the retract twice before finding a position that didn't interefere. It is close but it will work.
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Old 06-23-2012, 06:50 AM
  #186
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Default RE: Thorpe F-20 build

The F-20 standing on its new legs. Notice the slight positive angle of attack for the wings.
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Old 06-23-2012, 09:03 AM
  #187
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Default RE: Thorpe F-20 build

Terry, Looks great............keep on it.
Glenn
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Old 06-23-2012, 06:44 PM
  #188
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Default RE: Thorpe F-20 build

Thanks Glenn. Opened up the bulkhead to fit a 24 oz Kavan fuel tank. Used a dremel tool with a sanding drum.
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Old 06-23-2012, 06:49 PM
  #189
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Default RE: Thorpe F-20 build

Used a piece of balsa to act as a support for the tank to keep it from tilting down in the back. The air tank will go above the tank and keep it from tilting up in flight.
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Old 06-23-2012, 06:56 PM
  #190
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Default RE: Thorpe F-20 build

Added a plywood support for the back of the pipe to attach to. Glued in with 20 min epoxy. The screw is a #4 wood screw and washer. Redrilled the screw holes for the front tabs of the pipe so the #4 screws tighten from the top. The three screws hold the pipe very well. No additional support should be needed.
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Old 06-24-2012, 05:34 PM
  #191
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Default RE: Thorpe F-20 build

Cut and glued in servo rails for the retract and steering servos. Then mounted the servos.
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Old 06-24-2012, 05:38 PM
  #192
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Default RE: Thorpe F-20 build

Made a support for the air valve from a plastic control horn. Mounted it to the servo rails and connected it with 1/16 wire to the servo control horn. Started plumbing the air lines to the retracts.
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Old 06-26-2012, 02:06 AM
  #193
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Default RE: Thorpe F-20 build

Ran the airlines to the retracts. Kept them tucked in and out of the way by drilling small holes to run the lines through. Had to add one restictor in the line to slow the retracts.
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Old 06-26-2012, 02:13 AM
  #194
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Default RE: Thorpe F-20 build

Drilled the clearance hole for the steering wire through the bulkhead by hand. Couldn't get in there with a drill. Pretty tight. Started with a 1/16 then opened up to a 3/16. Soldered a threaded coupler onto a 1/16 wire. This will be the end that attaches to the retract steering arm.
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Old 06-30-2012, 09:23 PM
  #195
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Default RE: Thorpe F-20 build

Added a brass piece to act as a guide for the steering rod. Put a few bends in the rod to make it move smoothly from the servo.
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Old 06-30-2012, 09:29 PM
  #196
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Default RE: Thorpe F-20 build

Sanded the pod on the back of the vertical stab before sheeting the exhaust nozzle.
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Old 06-30-2012, 09:36 PM
  #197
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Default RE: Thorpe F-20 build

Used some filler balsa around the exhaust nozzle to give more surface to glue the sheeting to. Sanded smooth with the last bulkhead and exhaust tube.
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Old 06-30-2012, 09:42 PM
  #198
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Default RE: Thorpe F-20 build

Glued on some scrap balsa to act as a ledge for the 3/32 strips cut from sheet. A wider sheet just didn't want to wrap around the nozzle very well. Started gluing on the 3/32 strips.
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Old 07-01-2012, 05:40 PM
  #199
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Default RE: Thorpe F-20 build

Finished gluing on the sheeting and started sanding the exhaust nozzle into shape.
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Old 07-01-2012, 05:43 PM
  #200
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Default RE: Thorpe F-20 build

More sanding...
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