Impala

 

Impala - plan thumbnail image

Impala - completed model photo more pics (4)

Impala  
by Phil Smith
from Veron
1970 
52in span
Tags: Glider R/C
all formers complete :)


Submitted to Outerzone: 28/07/2013
Outerzone planID: oz4658 | Filesize: 1153KB | Format: • PDFbitmap | Credit*: CodysNeighbour, AugustaWest

   

About this Plan

Veron Impala - Slope soarer trainer. Primary hillside soarer for 2 channel radio control on rudder and elevator only.

Quote: - "The Impala is a balanced design capable of stable flights in all conditions. It has a flat undercambered section to give stable penetration and this coupled with a lifting section tailplane obviates 'ballooning up' in up or downwind situations. Also balanced side areas to move diagonally along a soaring ridge without 'weather-cocking' into wind and without the constant need for repeated corrective signals. Ample dihedral gives a high degree of inherent and self-corrective stability."

Direct submission to Outerzone.

Update 24/04/2015: Replaced this plan with a clearer version (less scanner creep), thanks to AugustaWest. Note there are some small differences between these two versions of the plan, eg previous version shows servos in fuselage elevation, this one shows an actuator. Also, this title block says 'Model Aircraft', where previous version says 'Veron'.

Supplementary files

Instructions, as supplied in the kit. 2 pages of text. Also, previous version of plan scan.

Corrections?

Did we get something wrong with this plan? That happens sometimes. Help us make a correction

 

User comments

If you build the Impala (and you should!) you need to make a full length 1/32 ply doubler for each of the fuselage sides (on the outside) otherwise the fuselage will definitely break on anything but the lightest of landings. The Impala flies well in force 4 to 5 winds.
CodysNeighbour - 28/07/2013
Hi Steve, I read on the Impala new plan that he states "It has a flat undercambered section" This is not possible. It should read flat wing section.It is like being round and square at the same time!! makes no sense. I'm sure you'll agree with me. Regards,
Eduardo - 25/04/2015
Yes, I agree. This is a direct quote from the printed kit instructions text, but I guess it was a mistake, and they meant to say 'flat bottomed section'
SteveWMD - 25/04/2015
Hi Steve, I'm probably not the first to comment on this, but the term 'flat ( bottomed) undercamber section' is perfectly correct. The lower surface does not have to be concave for the section to be undercambered. The camber line of an aerofoil is located equidistant between the upper and lower surface. If it is straight, the section is symmetrical. If it is curved downwards, it is undercambered. Flat bottomed sections like Clark Y are therefore undercambered. They are a 'special case' of undercambered aerofoils just like a square is a special case of quadrilaterals. Even a semi-symmetrical section is by definition undercambered ! Cheers !
ChrisPinn - 27/04/2015
Interesting. That's news to me. I guess common usage is then (strictly speaking) incorrect. Myself, I am very common and so I read 'undercambered' as meaning 'concave'. A quick check with Google image search suggests I am not alone.
SteveWMD - 27/04/2015
The technically correct description of the Impala's airfoil is a cambered airfoil section with a flat bottom. Anyone believing the terms "cambered" and "flat bottomed" to be somehow mutually exclusive needs to read "Model Aircraft Aerodynamics" by Martin Simons ISBN 978-185486-190-0 or some other authoritative reference explaining airfoil camber.
BobKeller - 01/05/2015
I agree. But common usage differs. It just is what it is. So when composing a model kit instruction manual aimed at the public, I'd say best bear that in mind. Otherwise you may be technically correct, but the majority of your customers will have misunderstood what you meant.
SteveWMD - 01/05/2015
Hi - a photo of the Veron Impala for the plan page on Outerzone [see more pics 004].
Anon - 04/01/2016
Impala built from Outerzone plan [more pics 005].
GeorgeSlocombe - 08/06/2016
Added superb pic of Impala built to 70%, thanks to Al [more pics 006].
Mary - 28/04/2017
Add a comment

 

Notes

* 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.

Scaling

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, 2011-2017.

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.