HPA

Scale Free Flight Forum => Scale, outdoor => Topic started by: chris46 on May 01, 2026, 06:53 PM

Title: Piper J-3P
Post by: chris46 on May 01, 2026, 06:53 PM
The Piper J-3P
While he was still alive, a friend of mine—who sadly passed away recently—gave me a kit from Hacker. It is the Piper J-3C. While searching for scale-accurate reference materials online, I came across an article by Aero Resources Inc. about a small series of Piper J-3s equipped with a 3-cylinder radial engine. That struck me as an interesting variation, as an alternative to the usual J-3 Cup models.

Chris
Title: Re: Pipert J-3P
Post by: chris46 on May 01, 2026, 07:00 PM
As usual, I started building details, namely the Lenape Papoose 3-cylinder radial engine Dumy in 1:15 scale. (see the "Techniques" section in the General Forum).
I will not report here in datail about how such a model is built. The procedure is the same for most kits. Only this: The parts are cut very precisely and fit together very well. The wood quality is also good. The construction is, for such a large model, delicate and requires reinforcements in certain places. On the other hand, the basic construction is very light, weighing only 35 g (without covering, paint, rubber and propeller).

Chris
Title: Re: Pipert J-3P
Post by: chris46 on May 01, 2026, 07:05 PM
Now the model could be assembled for the first time, including landing gear and tail wheel.
To finish the model I made and adjusted the wing struts and sprayed them with the airbrush. In this context, I reduced the dihedral indicated in the plan. Last but not least, the engine cowling included in the kit had to be adapted to the new situation with the 3-cylinder radial engine. Now the model is ready to be covered with tissue.

Chris
to be continued
Title: Re: Piper J-3P
Post by: chris46 on May 15, 2026, 05:08 PM
The model is now fully covered with tissue and treated with dope. The planned paint scheme will match the photo provided, which shows one of the two Piper J-3Ps still in airworthy condition.

Chris
to be continued
Title: Re: Piper J-3P
Post by: chris46 on May 28, 2026, 06:27 PM
Another special day: the rollout of the Piper J-3P "Papoose" from my workshop. With rubber and propeller, the model now weighs 90g. The wingspan is 71.5 cm, giving it a scale of 1:15 relative to the real aircraft. The wing loading, excluding the horizontal stabilizer, is 12g/dm². The next report will cover the first trimm flights.

Chris
to be continued
Title: Re: Piper J-3P
Post by: TheLurker on May 28, 2026, 07:42 PM
That's a pretty little thing.
Title: Re: Piper J-3P
Post by: ramses on May 28, 2026, 07:43 PM
Beautiful Piper!
Good luck with the trim flights,
Happy landings

Cheers, Ramses
Title: Re: Piper J-3P
Post by: dputt7 on May 29, 2026, 04:54 PM
   WELL DONE THAT LOOKS GREAT!
Title: Re: Piper J-3P
Post by: ZIP.58 on May 29, 2026, 11:35 PM
Chris, another great model—and not the kind you see everywhere.
I'm really looking forward to flying our Pipers together.
Pete
Title: Re: Piper J-3P
Post by: Anyun on May 30, 2026, 01:59 AM
Beautiful model with a striking colour scheme! And that engine really sets it apart from the usual Cubs.