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Old Oct 31, 2012, 09:59 PM
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GA Foamies/plans for MPF- V35, B58, M20

EDIT:

Foamooney Exclaim (free plan), 35" span. See post #172.

I have changed the title to more accurately reflect my desire to expand this thread to include all designs currently in the works. Some will be kits, some will be free plans... I also added a couple pictures up front to show what's been done so far.


Designs completed (kits pending):

Foamanza 33, 33" span
Foamanza 35, 33" span
Foamanza 36, 33" span
Foamanza 55, 38" span
Foamanza 58, 38" span


Next: Foam-Air 90/ 200, Foamanche, Foamy Mixmaster, ???

Original post:


I have been toying around with designing some nice knock-around foamy General Aviation machines to be made with MPF, something with an "undercambered" wing or KF2 airfoil. I think a Bonanza will be first! it won't exactly be a full fuselage, at least at first, but more of a thick plate or a box, similar to the SEMFF combat planes. If there is any interest I will maintain a modest thread.

Initial design will be around 31", with a slightly enlarged tail and wing planform. I will also design a set of removable landing gear for the "Foamanza"... no self respecting foamy GA aircraft will always have to resort to a belly landing. I want to do touch and goes sometimes! Later I may do a few other GA planes if I like the result, such a a Comanche(or Foamanche!), Cherokee, 152, or a Baron. We'll see. My evenings are pretty busy right now on the work front- I might however be able to work on this project on my lunch hour & breaks.
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Old Oct 31, 2012, 10:07 PM
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Here is a screen capture from CAD.
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Old Oct 31, 2012, 10:24 PM
Slopeosapien
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Always loved that V tail...
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Old Nov 01, 2012, 07:23 AM
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Nice application of the VLF concept. Should be a very attractive plane.

Ken
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Old Nov 01, 2012, 01:11 PM
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Quote:
Originally Posted by dz1sfb View Post
Nice application of the VLF concept. Should be a very attractive plane.

Ken
i agree...subbed
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Old Nov 01, 2012, 05:26 PM
Fremont, CA
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What's the "VLF concept"? Vectored lift?
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Old Nov 02, 2012, 10:25 PM
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I believe it is Vertically Laminated Foam. I have made some progress on the design, having laid out the initial design on a 24"x 48" rectangle (1 sheet of MPF). I will start cutting this weekend, then no doubt make some changes to the parts. I am also working up an F33 tail and some fancy vac-formed parts just for fun, in order to give a choice on the version of Bonanza. I will snap some photos during the fit up.
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Old Nov 02, 2012, 10:36 PM
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Latest:
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Old Nov 03, 2012, 09:02 PM
Slipping the Surly Bonds
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Quote:
Originally Posted by djacob7 View Post
What's the "VLF concept"? Vectored lift?

Vertically Laminated Fuselage

Ken
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Old Nov 03, 2012, 09:16 PM
Fremont, CA
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Thx Ken
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Old Nov 04, 2012, 03:32 AM
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More progress... I have started cutting foam, starting with the tail surfaces. The horizontal for the F33 version can be cut in half to make the V-tailed 35 version. I will be making 2 interchangable tails for testing. All tail surfaces were enlarged a little further to enhance stability & to facilitate having enough stabilizer area when making the V-tail out of the straight-tail parts. I hope to have an airframe for glide tests by tomorrow or the day after.

The F33 version looks pretty nice... see pic below.

Question: I am planning on ailerons, but I was curious about trying out a version without them. Does a KFm2 airfoil work with a no aileron configuration? Dihedral would be around 6 degrees I think.

Oh, in the last picture I was playing around a bit.
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Old Nov 04, 2012, 03:34 PM
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Here are a few shots of today's progress. I'm starting to get excited! Had to quit before I wanted to- darn.
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Old Nov 04, 2012, 06:48 PM
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I am watching closely as I like the V-tail Banana... One comment here. The way that you are doing it, using the same parts for the horizontal of the + tail version and the whole tail of the V tail version is going to make it an apples to beans comparison. Either your + tail will be significantly larger than necessary, or your V tail will be smaller than necessary. Larger is fine, but smaller than necessary is very bad. To make it a reasonable comparison, the total V tail area should be the same as the TOTAL horizontal PLUS vertical area of the + tail.

Just hoping to avoid having a poor design give the V tail a bad rap.

J.P.
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Old Nov 04, 2012, 07:03 PM
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Oh don't worry, I am considering those factors. The standard horizontal is indeed enlarged so that there will be enough area when converting to the V tail. Yes, that does mean that the standard horizontal stab is bigger than it needs to be, but that's ok for me. It could be trimmed down if necessary.

I will make sure that the V tail will fly nicely, as that is the version I like the most. As long as I give it enough area & have the V angle correct (I went with 33 degrees from horizontal), I am fairly certain it will fly well.

Thanks for the input, and feel free to chime in anytime.
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Old Nov 05, 2012, 06:23 PM
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Sure. I am not trying to step on any toes here. I just figured that it is better to speak up if you already know rather than say nothing and find out too late that you didn't know. I am watching with interest.

J.P.
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