About this Plan
Challenger. A 56 inch span semi scale FF power. From Model Aircraft, May 1950.
Quote: "An attractive semi-scale power model. Challenger, by JA Newton.
CHALLENGER will appeal to those who like their models to look something like the real thing and yet have a good flight performance. It is a good all-the-year-round model and will stand up well to the inevitable hard knocks from all-weather flying. The construction is quite straight-forward and is unlikely to present any difficulties to the average aeromodeller.
The Fuselage. Build two sides on the plan in the usual manner. When dry remove and cover with 1/16 in sheet. Remember to make a right and left side - it is easy to boob here, I know, I've done it! Join the two sides by means of the cross pieces. The next job is to fix the centre-section struts in place, this must be done securely, using plenty of cement and plastic wood. Add the semi-circular top decking formers and sheet the top and bottom.
Now cement the undercarriage tubes in place, again using plastic wood for strengthening purposes. Cement a piece of 3/16 in balsa sheet between the tubes and face with 1/16 ply to provide a secure fixing for the bolt which holds the undercarriage springs. The knock-off engine mounting is of the usual type and requires no explanation here.
A 2 cc ED Competition Special was used on the original model and it provided ample power. Anv other motor of similar capacity could be used instead and the design permits of either upright or inverted mounting. The sides and bottom of the engine cowling are shaped from 1/2 in sheet and rounded to shape after assembly. The top cowling is carved from soft block, hollowed out to suit engine and fixed with dress snap fasteners. The centre-section should now be completed, making sure to get the angle of incidence correct. The wheel spats are an optional fitting.
The Wing. The construction of the two wing halves is quite straightforward. Before cementing the tongue into position, incline the first rib to give 3 in dihedral at the wing tips. Be sure to select hard balsa for the leading and trailing edges and the spars..."
Update 20/09/2013: Added an alternate version of this plan, as a supplement, thanks to JJ.
Update 23/09/2013: Replaced the alternate plan with a correctly scaled version at 56in span, thanks to RogerC.
Supplementary file notes
Planfile includes article.
Alternate version, this one has a plain white background.
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
Do you have a photo you'd like to submit for this page? Then email email@example.com
User commentsNo comments yet for this plan. Got something to say about this one?
Add a comment
* 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.
© Outerzone, 2011-2019.
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.