Dean (oz14758)

About this Plan

The Dean. Free flight sport model for CO2 power. Wingspan 16-3/4 in.

Quote: "The Dean, by Frank Ehling. CO2 power makes possible amazing performance in small size. Try the Dean.

WITH a flip of the prop this little ship is on its way skyward, and when the power is spent it is a mere spot in the blue. That's right, it doesn't take a large engine and a large ship to turn in good flights one after another. With a little wood, tissue, cement, glider polish and sandpaper this ship is a snap to build. The wing is movable - and that makes it easy to balance. Ours flew the first time, so there isn't much to be said about adjusting.

The engine can be installed upright, and when gas runs out, the prop will stop; since the prop is so far below the wing, a dive will follow as the prop sets up drag. This effect can be used as a dethermalizer, or the engine can be installed inverted or on its side and will then free-wheel. A folding prop is good because this will reduce the drag even further and the glide will be improved considerably.

The Ritz type of wing which we used is not new; however, it is a good way to save weight and keep strength high. Be careful how the center of the wing is cut out as this wood is later used for the stabilizer. (Really economical!) The pylon is cemented to the wing and held in place on the fuselage with scotch tape; when the model is perfectly adjusted the pylon can be cemented.

This ship is a little large for its Campus A-100 engine and it is wise to keep total weight to around a half ounce. This will give a steep climb and a lazy glide. The short tail moment gives the model the ability to circle tightly, just what is required for thermal hunting.

To start construction, cut the 4 fuselage sides from 1/32 sheet and cement together to form a square. Sand well and apply a coat of glider polish, then set aside to dry. Cut the rudder out of 1/32 sheet and sand. Make the pylon from 1/8 sheet (be sure to have the grain rim-ning as shown on plan) and cement in place the V that rests on the fuselage. Cut the ply-wood firewall from 1/32 sheet and mount the engine in place. Cut a hole in the side of the fuselage for the tank filler valve. Location of the tank will vary with each ship, but the tank should be mounted as near the nose as possible so as to get the wing well forward, thus making the ship easy to fly.

If your Campus engine is fastened directly to the gas tank, simply cut a hole in the firewall to pass the tank, and support the latter at the rear with a balsa block. Latest models of this power-plant have the tank and engine separate and connected with a thin copper tube. If you own this type, fasten the engine to the firewall with 3 common pins; clip them off 1/8 behind the wall, bend over and glue in place. Mount the tank as near the nose as possible; glue firmly in place, with the filler valve down..."

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