Spitfire Mk IX (oz12210)

 

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User comments

A fine drawing from someone who knows his mettle, and a fine design from someone who knows how his model engineering :-) If one wants to avoid gray printing it's easy to convert all colours to black, print away and then close the file without saving changes.
That French site is from the time before large format scanners and the most practical format for larger size models was DXF or DWG. A good time for developing those CAD skills. There are still a few surviving places from the Triassic, one example is Dave Fritzke's own http://my.pclink.com/~dfritzke/, a well-known name here ;-)
Miguel - 24/05/2020
This is a really nice design, lots of plywood so wondering about the weight :-). Does anyone know what is a 600 geared electric motor? Or has an example of one?
Kevin - 27/05/2020
If you have a look at the modified alternate version of this plan by Won2Race here https://www.rcgroups.com/forums/sho... there is a drawing of a suggested modern brushless motor setup. He shows a 600W 3520 6 turn 840kV outrunner with a 3S 5.3 Ah lipo. Actually, that's such a good version (of this plan), it would make sense for us to add that as a separate entry over here on Oz.
SteveWMD - 27/05/2020
I've built several models intended for different motors with good success. A model of this size would normally use a 40 size glow motor. The E-Flite site, https://www.horizonhobby.com/content/e-flite-rc has some good information on motor sizes. Some of their motors have numbers similar to glow engine sizes. The E-Flite 46 looks like a good match for the Spitfire. E-Flite will tell you what prop and battery to use, has worked well for me. Don't even consider a geared 600 motor, even if it's free. This model is fully covered with sheet balsa, so pick out some light balsa to control weight. Good balsa is not easy to get these days, I always order about three time what I need so I can pick the best, hobby shops have little choice. Be careful about the spinner, don't even consider a plastic version, will (not may) be badly out of balance, will ruin your bearings. Ask me how I know. Use APC electric props only. And of course there are the Three Rules of Electric Flite.
Keep it light.
Don't let it get too heavy.
It shouldn't weigh very much.
The immortal Spitfire has a reputation for having a too-small tail. I would increase the size of both surfaces, keeping the same shape. No one will notice. They fly beautifully, having flown several. They tend to nose over on landing, consider moving the gear forward a little. I said a little, not a helluva lot. Retracts may not be your best choice.
Doug Smith - 27/05/2020
Hi Steve, thanks a ton! Exactly what I'm looking for! I agree with your assessment that those plans should be added, or replaced as it's 2020 and brushless motors are not a thing anymore on this scale :-). Only downside is most of these plans are in weird (non-metric) units ;-P, but it's one I'm willing to put with :-D.
Kevin - 28/05/2020
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