Mile Master (oz3226)


Mile Master (oz3226) by Larry Grogan from Flying Models  1958 - plan thumbnail

About this Plan

Mile Master. Control line Proto Speed model, by Larry Grogan.

Quote: "Not many hot turning Proto ships are as easy to build as this Nats-winning design. Mile Master, by Larrry Grogan.

As with most contest models, this design came about as a last-minute effort. We'd decided to try Proto at a coming meet, then only a few days away. This decision prompted us to build light on a very simple theme. Naturally, we wanted the ship to be fast too so we didn't compromise on any points we felt were really necessary.

The basis of the design was a B Speed pan with a light balsa structure over the top to cover the engine and other necessary parts. We added a gear and cockpit to comply with the Proto rules, four quick coats of Aero-Gloss dope and we were all set. This proved to be enough for the ship turned consistently in the high range.

The design placed 2nd at the South-western and was flown to First place at the Nats by Hardie G Lewis. In both cases, the ship was flown late and there was only time enough to make one flight. At the Southwestern, it ran 97.78 and turned a fast 102.19 at the Nationals.

There's little more that can be said. If you're out to fly Proto and you want a simple-to-build fast ship, we suggest you try the Mile Master. It's performance speaks for itself.

CONSTRUCTION: Start by preparing the B Speed pan, checking the mounting of your engine, tank and landing gear. This takes a little care so make sure that everything is drilled and tapped properly.

The top is fitted around the engine and other parts. Carve this from 2 balsa blocks taking note that they are stacked one above the other with the wing going through at the parting line. A little judicious sawing with a coping saw will save you considerable wear and tear, As you develop this assembly, provide for all vents and slots. Do not join these blocks together un-til you have finished the wing.

The very top of the cowl is made from Bass wood and is fitted over the glow plug. Leave a little clearance between the cylinder head and the wood to assure cooling through the fins. The inside of the cowl should be finished smoothly.

Make, he wing from 3/8 balsa sheet carving it to the airfoil outlines shown on the Plan. A symmetrical section is employed and it is simplified in carving by marking a line down the center of the leading and trailing edge before cutting. Install the Mono-Line control unit as shown. The passage way is slotted pinto the bottom of the wine and is filled with a balsa strip on completion of the wing. The strip is sanded flush to cover the passage. Note the cut ou which permits installation of the Mono-Line cable..."

Flying Models, March 1958.

Update 08/06/2019: Added article, thanks to RFJ.

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Mile Master (oz3226) by Larry Grogan from Flying Models  1958 - model pic


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User comments

Mile Master isn't a Rat racer. It was a Proto Speed model. They were timed from a standing start for 14 laps which is equal to 1 mile. Hence the name... Mile Master!
Sam - 24/08/2012
Got it. Fixed, thanks Sam.
SteveWMD - 24/08/2012
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