Pottier P70S (oz14366)

About this Plan

Pottier P70S. Free flight scale model for electric power, with VL Hytork motor.

Quote: "Electric F/F Scale at its best! Designed by a top French modeler and built for this article by Jack McCracken, the Pottier is a fine, stable flier. Text by Count Alex Pisana.

Relatively unknown in the US, Emmanuel Fillon is a legend in his own time in France. With a good deal of rubber and power experience behind him (he won the 1937 World Wakefield title), Mr Fillon is presently in semi-retirement in the town of St Raphael on the French Riviera, turning out a steady stream of interesting and very flyable scale ships, all the way from electric Gossamer Condors to Styrofoam peanut Spitfires.

Having had incredible good luck with his Desoutter and Petit Brochet models with electric power, we decided to help him become known to RCMB readers via this nifty little ship which Jack McCracken generously built and flew for this purpose. First and foremost, Fillon designs, like this one, FLY!

Assuming that you have built a rubber job or two, you do not have to be reminded that light planes fly better, and this is doubly true with electric. We used the VL Hytork 48 motor/battery package, but the design could be adapted easily to other units or even .02 gas. It would make an incredibly good schoolyard R/C subject. It could be thermalled if built as a rubber model!

The weight of the VL unit is a bit less than 3 oz, so to have a really good flier, the rest of the ship should not add more than three more to this figure. No nose weight need be added to any electric model, as it is a simple matter to slide the battery pack forward or backward for balance.

Wing Contruction: The wings are made with a full D section spar, with the spar made in upper and lower pieces. Start by pinning the TE over the plan and assembling the ribs to it, along with the lower hail of the main spar. Pin down and Titebond together. Then add the top half of the main spar and insert the 1/16 x 1/8 rear spar and glue. Add the 1/8 hardwood wing-locating dowel stub and epoxy on the1/16 ply male wing-mounting tongue parallel to the building board while the tips are blocked up to one-inch dihedral.

The 1/32 sheet balsa leading edge may now be bent around and glued on. Fillon soaks his and bakes them on a form in the oven, but the McCracken method of just bending it around the front of the ribs worked fine. Wiping a little ammonia on the outside of the sheet with a cotton ball will aid in the bending..."

Direct submission to Outerzone.

Supplementary file notes

Article.

Corrections?

Did we get something wrong with these details about this plan (especially the datafile)? That happens sometimes. You can help us fix it.
Add a correction