Marvin (oz7458)

About this Plan

Mercury Marvin. Control line stunt model.

Quote: "Instructions for Building and Flying the Mercury Marvin. Designed by Dave Platt.

The introduction of the AM.10 engine with its phenominal power output and high-speed performance has made possible for the first time the design of a real acrobatic stunt model for a 1 cc engine. The Marvin has been especially produced to take full advantage of this performance.

Although very easy to fly and therefore quite suitable for inexperienced stunt fliers, it must not he thought that this is simply a beginner's model. The Marvin will definitely go 'right through the book' and will perform the current Control-Line Stunt Contest Schedule perfectly. The prototype was flown by a number of well-known stunt fliers all of whom expressed their satisfaction with the model's acrobatic qualities and amazement that such a performance was possible with a motor of so small a capacity.

The completed model is robust and will stand up to all reasonable usage. With its coupled flaps and elevators its design is right up-to-the-minute and its appearance is pleasingly semi-scale. You are strongly recommended not to modify the layout in any way. The design is just right as it is.

The CG position, as with all good stunt designs, is important and should be as near as possible to the position shown on the plan for full sensitivity but not behind it. With the CG further forward the model will he less sensitive and that much easier to fly. But try not to have the CG further forward than 1 inch in front of the front line.

Make sure that you get the relative movements of the flaps and elevators correct. This is important in obtaining stability with sensitivity and freedom from wing stalling or 'mushing'.

Build and fly your Marvin in accordance with this plan and instructions and you will have a real stunt model of modest dimensions that will give you many hours of pleasurable and thrilling flying. Do not attempt to build your Marvin front the plan alone without reference to these instructions.

BUILDING THE WING

1. Press out all the wing ribs from the die-cut sheet. Pin lower spars over the wing plans and cement all the ribs in place.
2. When cement nas set, remove from plan and pin the two tower wing Trailing Edges in position on plan, Cement all ribs to TE's supporting front ends of ribs to correct angle. Leave to set.
3. Cement top TE's in position. Leave to set. Don't forget to pre-cement all TE joints for extra strength.
4. Cement leading edge in place precementing the joints to every rib.
5. Add top spar. Check for warps. If any sign of these pin down overnight to correct.
6. Add wing tips. Don't forget the wing tip weight in the starboard wing as this is absolutely essential.
7. Drill hole for bolt in bellerank platform... "

Quote: "A handsome cabin model for stunt flying with any good 1cc to 1.5cc diesel. Coupled flaps and elevators. Wing area 175 sq ins. Will fly the full pattern."

Direct submission to Outerzone.

Update 21/12/2018: Added kit instructions, thanks to nickharp.

Supplementary file notes

Instructions.

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