Cheap Jeep (oz13682)

 

Cheap Jeep (oz13682) by Dereck Woodward 1999 - plan thumbnail

About this Plan

Cheap Jeep. Radio control sport model for .25 engines.

Quote: "A small fun-filled hotrod. Cheap Jeep, by Dereck Woodward.

Some years back, I spent many happy hours with 'Holi' - a small hotrod published in RCMW that keeps reappearing as folk realise just how much fun you can toss into a small car. Economy was achieved by using 36 in long spars; honest handling came from the low aspect ratio wing for good low speed manners, while 'adequate' controls put the snaps and spins back. One thing lacking on Holi was curves - drawn with pencil on paper; the airframe wasn't prone to excessive curviness.

Then I discovered CAD! Computer Assisted Drafting means never rubbing out lines again! Teach myself CAD involved putting Holi's shape into CAD - then changing it. Snips when the machine tells you the area of, say, the fin. Change the shape, tell Fred (the computer, don't ask!) to calculate the new area. If it matches, fine. If not, fiddle with it some more until it does.

And now for something completely different! Art Chester's 'Jeep' racer has always fascinated me - but he made life difficult for modellers down the road? Though the aircraft is easily recognisable, it's all odd shapes and angles. A week of reading the manual, and I had a Holi-sized Jeep-ish plan. Might as well build it now!

Okay - you're still here. Good, let's run through the building sequence - I'll leave you to the details. If I have to spend three paragraphs explaining the best end of a knife to hold, maybe you better come back later. A one-piece airframe means you don't have to fret about drilling for bolts and dowels, but you do need to arrive at a point with the big bits ready to meet socially.

Wing: There is a slight double taper on the LE, while the TE taper is all on the ailerons. This yields a straight aileron hinge line, and all ribs are identical aft of the spar. The rib profile was altered ahead of the spar, to give the forward taper. As there aren't that many ribs, cutting them out is a trivial chore.

Steve Kerry and myself developed the surface spar over a lot of e-mails. Steve came up with the idea of putting it on the top of the ribs, reasoning that spars should be as far apart as possible, while I tossed in tapering it. Instead of 1/4 x 1/8 spruce under the LE sheet, by using 1/2 x 1/16 spruce glued to the back of the LE sheet all the spar material is as close to the surface as it is ever going to be.

There's a lot of wood in the tips; hence the thin core to give the shape and a couple of laminations to give some edge thickness. With CA glue, it is hardly a long job and weighs much less, while being stronger, lighter and more stable than thick sheet.

Once you get that far, remember that the aileron servo is offset to starboard, so fit the torque rods accordingly. Carving the ailerons requires a little attention to making sure you get the changing taper correct, but it is nothing that care and skill can't take care of..."

Direct submission to Outerzone.

Supplementary file notes

Article.

Corrections?

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

Cheap Jeep (oz13682) by Dereck Woodward 1999 - model pic

Datafile:
  • (oz13682)
    Cheap Jeep
    by Dereck Woodward
    from RC Model World
    July 1999 
    40in span
    IC R/C
    clean :)
    all formers complete :)
    got article :)
  • Submitted: 25/02/2022
    Filesize: 420KB
    Format: • PDFbitmap
    Credit*: rocketpilot

Cheap Jeep (oz13682) by Dereck Woodward 1999 - pic 003.jpg
003.jpg

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

User comments

No comments yet for this plan. Got something to say about this one?
Add a comment

 

 
 

Download File(s):
 

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, 2011-2022.

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.