Ellipse 2a (oz13811)


Ellipse 2a (oz13811) by Warren Brown 2022 - plan thumbnail

About this Plan

Ellipse 2a. Radio control sport model. Wingspan 33-1/2 in (850mm), for 1 cc diesel engine and 2 channels.

Direct submission to Outerzone.

Quote: "Hi Steve and Mary, Here is another plan to add to my collection. Ellipse 2a, perhaps a not very imaginative name, but it was designed before my Ellipse 3 (oz13543).

At the time I decided it was a little too large for my intended SAM 75 engine, so I went ahead and designed the Ellipse 3. The Ellipse 3 flew so well I decided the low-wing Ellipse 2 had to be built.

However I had found the washout a bit fiddly to achieve on the "3" so I redesigned the wing of "2" to make it self-jigging, hence the "2a".

So here it is, somewhat overpowered by a very nice Schlosser 1.0 diesel. On a 7x4 it flew like a little pylon racer but an 8x3 has tamed it to be very pleasant indeed. Loops, rudder rolls, barrel rolls - all lots of fun. It even takes off from the ground, staying nice and straight - and glides in to smooth landings, that washout must be working!

33 1/2" apan (850 mm)
2 channel (rudder/elevator)
approx 1.0 cc diesel.



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

Ellipse 2a (oz13811) by Warren Brown 2022 - model pic

  • (oz13811)
    Ellipse 2a
    by Warren Brown
    33in span
    IC R/C LowWing
    clean :)
    all formers complete :)
  • Submitted: 27/04/2022
    Filesize: 768KB
    Format: • PDFbitmap
    Credit*: WarrenBrown
    Downloads: 485

Ellipse 2a (oz13811) by Warren Brown 2022 - pic 003.jpg
Ellipse 2a (oz13811) by Warren Brown 2022 - pic 004.jpg

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

User comments

I think it needs ailerons.
Doug Smith - 08/05/2022
No, ailerons would definitely spoil this one. It rolls very well on rudder alone. Ailerons would give more axial rolls but would lose the charm, becoming just another sport plane.
Warren Brown - 08/05/2022
Dave Robelen designed a few low-wing RC models with just RE controls, I mean no ailerons. The Pronto and the Playboy, weren't they very successful?
SteveWMD - 09/05/2022
Perhaps I should expand a bit. I have nothing against ailerons, in fact most of my designs use them (Wasp, Rookie, Fugly Stick) but I find just rudder/elevator designs a refreshing change and they fly so sweetly (if you have enough dihedral).
The way I do it is to plug the rudder into the aileron channel so I don't have to re-learn how to fly. For the same reason I mix rudder into aileron so the rudder works normally for take off. Easy!
...and you will amaze your clubmates (at least the younger ones) doing rolls without ailerons.
Warren Brown - 09/05/2022
Anyone see a Vic Stanzel "Shark" in this one?
scotprin - 09/05/2022
Yes I understand. Yesterday I amazed an aerobatics instructor by doing rolls with my (no ailerons) Dollar Tree Guppy.
Doug Smith - 09/05/2022
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.