Come and get it - MicroMoth plan!! - RC Groups
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Aug 23, 2002, 10:25 PM
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Chris3D's Avatar

Come and get it - MicroMoth plan!!

Here it is:

Give it a try and let me know if you run into trouble or find any typos or anything.

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Aug 23, 2002, 10:43 PM
in persuit of low wing loading
Gordon Johnson's Avatar
That is a very nice plane, plan, and construction notes. Hopefully a lot of people will use this to get into scale RFFS-100 based planes. Thanks for going to the effort, and making this available to everyone.

Aug 23, 2002, 11:19 PM
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FLB's Avatar

Nothing special to say. Just thanks to share all that work. Gordonjohnson has already found the good words.


Aug 23, 2002, 11:40 PM
Senior Member
Paul Penney's Avatar
Fabulous peice of work! A good quality artical and plan.

With your permission I would like to host it on my site as a free plan.

Aug 24, 2002, 12:01 AM
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Chris3D's Avatar
Thanks everyone, I'm more than happy to make it available, and I too hope it inspires more scale models for the RFFS-100.

Paul, sure thing, but there may be some updates to the plan based on any feedback I get. Hopefully a few people will build it and let me know if anything is unclear. Just keep an eye on this thread to see if it gets updated. Maybe for the time being, you could just link to the file on my site.

Aug 24, 2002, 12:33 AM
Grand Poobah of Nothing
Trizza's Avatar
Lovely work Chris! Great plan. Great model.

The plan is sitting in the out tray of my printer now. I guess I'll have to go get some more 1/32 balsa
Aug 24, 2002, 01:42 AM
Registered User

Great plan man

And sure helps those that R trying to get themselves into the micro flight world

Beautifuly made, and a wonderful model.

Aug 24, 2002, 02:47 AM
Registered User
jk's Avatar
that is simply beautiful!

and thanks for the well documented instructions!

Aug 24, 2002, 08:34 AM
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Fly_joy's Avatar
THANK YOU for a great contribution to the micro community.
Aug 24, 2002, 08:49 AM
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Chris3D's Avatar
Thanks again, everyone, for the kind comments.

A quick note to anyone building one - the CG as indicated on the plan is incorrect. The first version of the plane I built had the top wing almost directly on top of the bottom wing - not set forward as in this version. I just test flew the plane this morning and it was a bit hairy... I've already re-located the battery up into the cowl beneath the motor, which will hopefully correct the problem. As soon as I can test fly it again, I'll update the plan.

This shouldn't necessitate any major changes, but I'd hold off on gluing in the firewall (F1) until I can verify that the problem is fixed. If the CG still needs to be moved forward after moving the battery into the cowl, moving F1 forward slightly should do the trick, as it will also move the motor forward with it.

Sorry for any inconvenience...
Aug 24, 2002, 04:57 PM
Registered User
Chris,thankyou for posting your plan.
I have started building, but I am in the U.K. I an not allowed to use 72Mhz, so I am using an I.R. system.
Keep up the great work,
Best regards,
Aug 24, 2002, 06:05 PM
Registered User
Chris3D's Avatar
Thanks Trevor, make sure you have the latest version of the plan. I just updated it a few hours ago with the battery relocated into the cowl, but haven't been able to test fly it as it's been too windy.
Aug 25, 2002, 09:54 AM
Registered User
Hi Chris3D

Great job on the MicoMoth. I downloaded the plans. What amount of dihedral is used on the wings?

Aug 25, 2002, 10:04 AM
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Chris3D's Avatar
Hi everyone,

I just updated the plan (no changes to the actual plan from yesterday, just a few changes to the construction notes). Regarding the CG, it's perfect where indicated, and I needed to add 2 pennies to the nose to get it to balance there. This likely wouldn't be necessary if the plane is colored with markers or something lighter than the watercolors I used. For every gram added way back on the tail, it takes about 4 in the nose to compensate... If you're using NiCads, all this is irrelevant, as the plane can be easily balanced by moving the battery forward or back between F1 and F2.

As soon as my battery is charged, I'll fly it again and try to get some in-flight photos...

Aug 25, 2002, 10:13 AM
Registered User
Chris3D's Avatar
Hi Dale, make sure you grab the latest version of the plan, I just updated it a few minutes ago. Regarding the dihedral, mine has about 3/4 of an inch at the wing tips, but that was a bit excessive and I corrected this in the plan before I posted it a few days ago. I'd say 1/2 inch at the tips would be plenty. For more scale appearances, the bottom wings should have a little more dihedral than the top.