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marston PteroWorks 52” Pterodactyl Instruction Manual

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Instruction Manual for the Marston 52" Pterodactyl
Thank you for purchasing this 52" Pterodactyl kit. It is unlikely that anyone else at your flying field
has anything like this. It is truly a distinctive design, and yours will no doubt be different from
mine, making it a one of a kind model.
This is not a beginner's kit, but it does not require expert building skills. The kit is fairly complete,
and if you have built and covered a wood model before you should have no trouble here. Take
your time, be careful and have fun with the build. You will need thin and medium CA to assemble
the airframe. Much of the gluing can be done by getting the wood in position first and then using
thin CA which will wick into the wood joint. Be sure to dry fit pieces first before applying glue.
This airframe requires some experience to fly, but if you have successfully flown a plane with
ailerons, you should have no trouble at all launching, flying and landing this bird. The wing loading
is very reasonable, and if set up properly there should be no surprises.
This instruction manual is available as a PDF on line at www.pteroworks.com/ptero_52.htm.
The photos in this manual can be enlarged for greater clarity in the PDF.
Wingspan 52 1/8"
Length 31"
wing area 330 square inches - 2.29 square feet
weight RTF 24-28 oz. (with a 3s 2000 mah li-poly battery)
wing loading 11 oz/square foot
Included in this kit: 15 sheets of laser cut wood (all wood required), 65" x 36" rolled plans, front
and rear carbon wing spars, 1/8" x 3/4" carbon wing locator, 1/2" aluminum wing locator tube,
#6-32 x 2" nylon wing bolts and blind nuts, instructions.
Additional gear required: two small brushless outrunner motors with a kVa of about 1400-1500
rpm/v (Axi 2208 or equal), two 6 x 5.5 props, two 10-20 A ESCs, four mini servos (HS-45HB for tail
and HS-65HB for ailerons) and a 2000 mah 3s Li-poly.
Requires covering material (Ultracote or Oracover recommended).
Thanks,
Ron Marston
Copyright © 2012 Ron Marston all rights reserved rev. D 2/12
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Summary of Contents for marston PteroWorks 52” Pterodactyl

  • Page 1 fly Instruction Manual for the Marston 52” Pterodactyl Thank you for purchasing this 52” Pterodactyl kit. It is unlikely that anyone else at your flying field has anything like this. It is truly a distinctive design, and yours will no doubt be different from mine, making it a one of a kind model.
  • Page 2 Wing 1. Cut carbon spars to proper length. forward spar - .240” dia. 41.40” rear spar - .156” dia. 45.40” 2. Layout all ribs on the plans then carefully feed them onto the forward spar (.240”). Do NOT glue yet. (B) 3.
  • Page 3 12. Glue remaining top trailing edge pieces to ribs. (F) NOTE: Wing sheeting is laser cut oversized to allow for sanding to a perfect fit. Soak sheeting in water for a few minutes first to ensure it conforms to compound curves. 13.
  • Page 4 Head and Neck Carefully remove all head and neck parts from the balsa sheets and sand as necessary. (K) Fit 2 head cross pieces to neck sides. (L) Fit 3/16” center neck piece in-between neck sides. Hold assembly together and wick thin CA into joints. (M) Fit top 3/16”...
  • Page 5 Head and Neck (cont’d) Sand diagonal angle into cross pieces that connect the head to the neck (from step 2) as necessary and fit and glue head sides to diagonal pieces. (Q) Sand and fit bottom head sheeting. Glue in place 2 oz lead here with thin CA.
  • Page 6 Body Carefully remove all body parts from the balsa sheets and sand as necessary. (V) Fit and glue Head/Neck assembly to one side then the other of the main body. Check alignment against plans and make sure both sides of the body are square before gluing.

  • Page 7: Final Assembly

    Final Assembly Sand ailerons and rudder-vators to a nice taper at the trailing edges. Also sand an angle where surfaces will attach to wing and tail to allow for downward deflection. Glue supplied control horns into all 4 control surfaces. (This may be better to do after covering). Check the fit of the wing in its saddle and sand if necessary.
  • Page 8 Final Assembly pictures Copyright © 2012 Ron Marston all rights reserved rev. D 2/12...
  • Page 9 Flying the Marston 52” Pterodactyl The Center of Gravity should be set to the center of the forward (.240” diameter) spar, plus or minus 1/8”. Do not attempt to fly with the C/G outside of this range. One to two ounces of lead in the head will likely be required to achieve this.