Classmate

 

Classmate - plan thumbnail image

Classmate - completed model photo more pics (5)

Classmate  
by Ken Willard
from RCMplans (ref:352)
June 1968 
39in span
Tags: IC R/C Biplane
all formers complete :)
got article :)


This plan was found online 18/01/2012 at: http://www.wattflyer.com/forums/showthread.php?p=607767
Outerzone planID: 604 | Filesize: 218KB | Format: • PDFbitmap | Credit*: windycity

   

About this Plan

Classmate - Biplane for 3 channel RC and .10 power with a top wing of 39" bottom wing of 32".

Quote: - "The Classmate is strictly a fun job. Like the full size airplanes of the era in which that type of design was popular - you have to dive it a little to get up speed for maneouvres. Then it does them at almost scale speed. You're not likely to win any contests with the Classmate, other than maybe a spot landing or limbo, or similar type club contest, but you'll enjoy the realistic take-offs and the scale like flying qualities. The spectators like it too. So build one, and see for yourself..."

Article scan thanks to RFJ.

Supplementary files

Article pages, text and pics.

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User comments

Starting with the PDF from Outerzone I made a laser-cut kit and built a Classmate. Instead of printing the plans I used my drawing software to measure the locations of the ribs and the fuselage formers, which I then marked on the wing skins and fuselage sides. I made several modifications on my model. I like spars in my wings, so I added 1/8" square spruce spars on top and bottom of both wings. The top wing has zero dihedral. The bottom wing has ailerons and is attached with bolts. The top deck is built with 3/32" sheet with no hatch, instead of the carved block hatch shown on the plan. I think it's rather excessively nose heavy as shown on the plan, though. I didn't like the CG suggestion, so I started by balancing it more than a quarter inch aft of the location specified, and it still takes a fair amount of up trim to fly and the nose drops when the throttle is cut. I'm going to move the battery a couple of inches aft and try it again. Other than being nose heavy it flies extremely well, and I recommend it to anybody who wants a relatively easy project that is highly customizable. My plane is powered by an OS 15 FP. The fuel tank is quite low compared to the engine, so don't use an engine with poor fuel draw. I'm attaching some photos of my plane [more pics 004-007].
RobReynolds - 29/03/2016
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Notes

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Scaling

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