About this Plan
Sportwin. Radio control sport twin model, for electric with 2x Speed 400 motors.
Quote: "A smooth looking, smooth flying twin that's easy to build and inexpensive to gear-out. Sportwin, by Mark Rittinger.
The Sportwin was designed as a fast yet controllable study in Speed-400 extremes. Its short span provides speed and penetration. The long noses of the nacelles aid its balance. The slight sweep in its wings' leading edges provides a bit of extra stability. While the Hoerner tips make her perform as though there was a lot more wing. The two Speed-400-sized motors give it plenty of performance. And, at an all-up weight of 29 ounces, the Sportwin has a very low wing loading that you'll really notice at slow flying speeds, such as during landing; it will float along, with the ability to glide.
If you've never built a twin, or have wanted to, then this is the ship for you. Don't let the two motors scare you! It's actually quite easy to fly. I believe anyone who has flown low wing single-engine airplanes could easily fly this twin. It has proven to be a very robust, light, and an excellent flying ship. This hot little twin builds quickly! So, if you still want this inexpensive performance airplane, get stocked up on 1/16 inch balsa, because the Sportwin's construction is almost entirely balsa, with the exception of its motor mounts.
Fuselage. The fuselage is very easy to build. Take care, however, to build it straight because there is a fuse and two nacelles hanging out front.
Begin by cutting out the fuse sides from 1/16 in light balsa. Leave the rear deck area material oversized, as it must curve around the top deck. Make sure there are no glue seams in the balsa sheet where it must bend, as it may crack instead of bend. Glue 1/32 doublers in place. Cut out and laminate F2 from 1/16 balsa, and glue it to the right fuse side. Attach the triangle stock to the sides as shown on the plans. Add the 1/8 in vertical pieces. There is no former in front of the wing..."
Sportwin, S&E Modeler, July 2001.
Direct submission to Outerzone.
Supplementary file notes
Article pages, thanks to RFJ.
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