M-600 (Midget 600). Radio control sport / pylon racer model.
Quote: "Designed primarily as a slower and easier-to-race Goodyear, the M-600 figured in the introduction of the new Prototype AMA 600 sq in racing class. And it is a natural for the weekend sport flyer. Midget 600, by Maxey Hester.
At the '66 Nats, this 'slower' design won most of the heats it entered. Because it handles more like a stunt model, not like a touchy bomb, this K&B .40 powered ship can be flown lower, tighter around pylons.
Goodyear racing is probably the most exciting form of RC flying to date. Anyone who has never flown in a race cannot experience the excitement a flyer feels in the fast speed and the race to catch the other planes, or to remain ahead of the plane just behind him. Goodyear pylon racing is a crowd-thriller, and the more planes in the race the bigger the thrill.
When Goodyear racing first started, everyone liked it and some built the small planes. Some planes didn't last long because they were fast and touchy on the controls. Some flyers I talked to, trying to get them to build a Goodyear, didn't want to put a lot of work into a plane that they thought would be short-lived. From the racing I have seen the past two years there are no more crashes in Goodyear racing than in any other RC flying.
To get more flyers interested in Goodyear pylon racing the thought was that a slightly larger ship would not be so tricky to fly, and yet would race right along with the smaller scale ones.
I designed the M-600 using the outline of the Midget Mustang. I built the M-600 early in 1966 and flew and raced it all year. I used full-house equipment: rudder, elevator, aileron, and throttle.
On the very first flight I was very surprised that it was faster than expected. Our club (Des Moines Modelaires) had a Goodyear race last May. About eight to ten planes showed up. This was my first chance to race the M-600 around the pylons against some of the smaller designs. I won all the heats I flew in and wound up winning the event! Most people couldn't see how a larger plane could out-fly the smaller ones.
Some of the smaller Goodyear racers have a wing area of 480 to 500 sq in, so the M-600 is only about 100 sq in more, but being a little larger, it is much easier to fly, so it is easier to fly the pylon course. You can fly as low on the course and make the turns as tightly as you wish with the ease of flying a Class II high-wing ship.
The fuselage being a little longer than the smaller planes, there is no problem of snap rolls when you pull elevator for a tight turn. Also the weight of the M-600 is about the same as the smaller planes.
I was pleased with the performance of the M-600 at the Goodyear demonstrations at the 1966 Nats. I won all the heats I flew except one when I had a rich engine.
The construction of the M-600 is about the same as we have been used to in building other RC planes. The wing is fully symmetrical with a double-taper. The mainspar is 3/16 x 1/2 . The wing, being thin and only sheeted with 1/16, needed the strength of an additional rear 1/8 x 3/8 spar. Use hard balsa for spars. The ribs are cut from medium soft sheet. The wing sheeting is light-medium.
The wing was built on a jig, pinning the bottom main spar down, and blocking up the 3/16 sq in leading edge, and tapered trailing edge. Cement all ribs in place, then the top main spar, adding the center spar joiner. Add the bottom rear spar from underneath; also the rear spar joiner and the top rear spar. Cement in the 3/16 sq aileron hinge spars.
While the wing is still on the jig, sheet the top side of the wing. Mark or slit the outline of the aileron to be cut out later. Take the wing from the jig and shape the balsa block to back up the 3/32 plywood landing gear mount. Ce-ment the balsa block to support the 1/16 plywood at the trailing edge of the center section for the hold-down screws..."
M-600, American Aircraft Modeler, August 1967.
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