HM300 (oz1087)

About this Plan

HM300. Free flight scale model of a variant of the full size flying flea designed by Henri Mignet. Model Aircraft June 1955. 26in span FF flying scale for mills 75 diesel power.

Quote: "A novel free flight flying scale model for the Mills .75 cc diesel.The following points may prove helpful during the building and perhaps will obviate any snags liable to crop up through an oversight:

Drill the engine bearers with a 064 drill and use 8 B.A. nuts and holts - this way you can get plenty of side thrust. A piece of 22 swg wire bent at right angles and soldered to the will kg will help to prevent the Wring moving. The bottom covering is left for the last operation, thus making it easier to fit the windows. The wing tips will need curving to wing section and this can be done with a hot iron, and make sure you have good joints between the tip sections. Cover the whole model with light-weight tissue and give three coats of thin clear dope.

For flying, I use an 8x4 prop on a Mills .75 engine, mounted with 2 deg. right thrust. The model should balance just aft of the struts. After obtaining a flat glide, trim for a slight right turn. First flight should be on half power until satisfactory results are obtained. It is possible that an increase in power will give a sharper turn, so increase side thrust - but never to the extent that you get a right-hand power turn, at it is fatal. The take-off is very fast and despite a short run, most realistic.

The HM.300 makes an intriguing little model, and although hardly In the super scale class, will give many hours of flying for fun. One last word - dont forget the fuel proofing."

Update 11/06/2015: Replaced this plan with a clearer copy (patterned background removed) thanks to TonyP.

Supplementary file notes

Previous scan version. Article page, text and pic.

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