Elf (oz847)


Elf (oz847) by Bill Dean 1951 - plan thumbnail

About this Plan

Elf. Free flight rubber cabin model from KK. Wingspan 16 in.

The Elf is a reduced size version of the larger 30 in Keil Kraft Ace (oz1344) design.

Update 06/04/2013: Added printwood scan showing all the wing ribs, thanks to Bry.

Update 12/9/2023: Added zipfile of extras (includes a new fully redrawn plan, with all parts), thanks to the Lurker.

Quote: "A cleaned up version of the PDF found on Outerzone, September 2021. Minor tweaks resulting from my build using the plan.

- The main plan given on an A3 sheet.
- Sub-assemblies broken out to A4 sheets.
- A transcription of the original build notes.
- Asymmetries removed.
- Formers & ribs re-drawn.

I’ve assumed that a plan built model will have a solid nose block so the top & side templates are given for that rather than a set of formers to laminate. There are no gusset profiles.

I had hoped to be able to get everything broken out to A4 sheet so no tiling would be necessary, unfortunately at 16” the wing can’t be made to fit an A4 sheet. You’ve two choices; (a) cut and paste the printout to give a one part plan and build the wing with a single root rib (W1) as originally drawn or, (b) build the wing as standard two part with with two root ribs & join. If you do build the wing in two parts note that the dihedral guide is for the plan as drawn so use it to set only *one* W1 off vertical, the other should be set vertical.

Of the formers that are provided I’ve kept the original designations so that the original build instructions can be used. You should note that F5, the nose plug, is drawn oversize. The dotted line shows the *expected* aperture size.

In keeping with current thinking an alternative, more forward, motor peg position is given, F8 bis. This gives a roughly 50:50 distribution of the motor about the CG. If you move the peg location you may want to put in a vertical spacer at the original F8 position to stabilize the tailplane platform.

The outdoor motor recommendation is taken from the original Keil Kraft plan, the indoor motor is what I use and is good for about 43s from ROG for a model weighing 14g inc. noseweight, but without motor. I found that a 1/16" shim was required to get the downthrust right for indoor use and that's why the noseplug is likely to need 3 laminations of F5."

Direct submission to Outerzone.

For some video of an indoor ROG flight of this model built from the tidied up plan, see https://vimeo.com/861757524 note this link will evaporate sooner or later because of space limitations.

Supplementary file notes

Lurker files zipfile.


Did we get something wrong with these details about this plan (especially the datafile)? That happens sometimes. You can help us fix it.
Add a correction

Elf (oz847) by Bill Dean 1951 - model pic


Elf (oz847) by Bill Dean 1951 - pic 003.jpg
Elf (oz847) by Bill Dean 1951 - pic 004.jpg
Elf (oz847) by Bill Dean 1951 - pic 005.jpg
Elf (oz847) by Bill Dean 1951 - pic 006.jpg
Elf (oz847) by Bill Dean 1951 - pic 007.jpg
Elf (oz847) by Bill Dean 1951 - pic 008.jpg
Elf (oz847) by Bill Dean 1951 - pic 009.jpg
Elf (oz847) by Bill Dean 1951 - pic 010.jpg
Elf (oz847) by Bill Dean 1951 - pic 011.jpg
Elf (oz847) by Bill Dean 1951 - pic 012.jpg
Elf (oz847) by Bill Dean 1951 - pic 013.jpg
Elf (oz847) by Bill Dean 1951 - pic 014.jpg
Elf (oz847) by Bill Dean 1951 - pic 015.jpg
Elf (oz847) by Bill Dean 1951 - pic 016.jpg

Do you have a photo you'd like to submit for this page? Then email admin@outerzone.co.uk

User comments

Added some pics, courtesy of Maciej, of his very fine finished model. See his thread on the KK Elf at: http://awiatikforum.ok1.pl/viewtopic.php?t=341
SteveWMD - 26/06/2012
It is not so much a correction but an error on the printed plan. The Ace which is the Elfs larger brother has the leading edge swept back and I believe that so should the Elf. There has been an error in my opinion from whoever drew it. Regards,
JoeN - 29/08/2017
Steve, Andrew Longhurst of SAM35 assures me that the plan is correct so maybe I am wrong. Regards,
JoeN - 31/08/2017
Some photos and a video of my KK Elf built from Outerzone plans [main pic, 005,006]. This model is covered with Japanese tissue and nitrate dope - with a generous amount of washout (both wings). It an excellent flyer indoors and out. Indoor photo by Peter Smith.
Video here: https://www.youtube.com/watch?v=QLWdUH2g_nA
ChrisMoes - 03/11/2020
Hi Steve and Mary, I’ve attached some photos of my just completed red and silver KK Elf [pics 007-010], and a photo of clubmate Paul Briggs model, the green and yellow version [011]. Also attached is a photo of our club Chairman Richard Granger’s blue and yellow model in the air at our flying field [012]. I hope you find them useful for your relevant plan page.
John Churchill - 30/06/2022
Hi Mary, Me again. Couldn't find an in-flight snap of of Elf so here's a couple of frames from the film clip [pics 014, 015]. Cheers,
Lurker - 12/09/2023
Add a comment



Download File(s):


* Credit field

The Credit field in the Outerzone database is designed to recognise and credit the hard work done in scanning and digitally cleaning these vintage and old timer model aircraft plans to get them into a usable format. Currently, it is also used to credit people simply for uploading the plan to a forum on the internet. Which is not quite the same thing. This will change soon. Probably.


This model plan (like all plans on Outerzone) is supposedly scaled correctly and supposedly will print out nicely at the right size. But that doesn't always happen. If you are about to start building a model plane using this free plan, you are strongly advised to check the scaling very, very carefully before cutting any balsa wood.


Terms of Use

© Outerzone, 2011-2024.

All content is free to download for personal use.

For non-personal use and/or publication: plans, photos, excerpts, links etc may be used, provided that full and clear credit is given to Outerzone with appropriate and specific direction to the original content i.e. a direct hyperlink back to the Outerzone source page.

Unauthorized use and/or duplication of this material without express and written permission from this site's owner is strictly prohibited. If we discover that content is being stolen, we will consider filing a formal DMCA notice.