P.1174 (oz9391)

 

P.1174 (oz9391) by J Crampton 1964 - plan thumbnail

About this Plan

P.1174. Radio control sport power model. Delta pusher design for Cox 0.8cc Babe Bee and single channel RC.

Quote: "A simple to build canard delta pusher model for single channel radio control. Designed by J. Crampton. THE P.1174 is a R/C model, based on the general configuration of the North American B-70. Its length is 3ft 6in and the wing span (at the trailing edge) 22in. The sweep of the Ogee plan form wing is 68 deg. The weight of the model, complete with radio three 1 volt pencell batteries and Cox 0.8cc engine, is 15 oz. The twin rudders are coupled together and operated by a Citizenship rubber powered sequence actuator and the radio gear is RCS. The model is trimmed with the differential incidence shown on the plan to fly in a gentle turn to the right, so that quick pulses produce a left turn. After a hand launch the model is made to climb in a series of S turns into wind and, when at about 200 ft it can be left to orbit in a climbing right-hand turn as it drifts back overhead. When the motor cuts it assumes a fairly steep gliding angle and loses height rather quickly - still turning to the right. Quick pulses on the transmitter just before landing straightens - and levels - out the flight path and the model touches down smoothly. This is a very satisfying design for several reasons: 1. It is simple to make - no ribs, spars or longerons. The fuselage box is made up from 1/8in thick balsa and the wings, fins, rudders and foreplanes from 3/32in balsa sheet. 2. Rudder effectiveness is the same with power on or off. 3. The model is remarkably stable especially in roll. 4. When rudder is applied the resulting yaw instantly applies bank in the required direction. When the rudder is straightened the model assumes its trimmed attitude at once. 5. The model is very strong and can take terrible punishment. 6. With a 'pusher' prop the model stays perfectly clean no oil anywhere..."

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

P.1174 (oz9391) by J Crampton 1964 - model pic

Datafile:
  • (oz9391)
    P.1174
    by J Crampton
    from Model Aircraft
    August 1964 
    22in span
    IC R/C Pusher
    clean :)
    all formers complete :)
    got article :)
  • Submitted: 27/10/2017
    Filesize: 567KB
    Format: • PDFbitmap
    Credit*: MikeJones
    Downloads: 1300

P.1174 (oz9391) by J Crampton 1964 - pic 003.jpg
003.jpg
P.1174 (oz9391) by J Crampton 1964 - pic 004.jpg
004.jpg
P.1174 (oz9391) by J Crampton 1964 - pic 005.jpg
005.jpg

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

User comments

Just a cautionary tale on this one. I decided to build the P1174 in 1970 and it was one of the few models that finished up being scrapped before it was finished. After finishing the structure, I started to give it some coats of dope prior to installing the RC. To my horror the wing warped alarmingly, going from the intended S-curve at the root to something looking more like a papadam at the tips. There was no way I could get the wing curve back to shape, so I binned the model. If I built it again, I would dope the wing with well thinned dope and weight it down flat for a few days before gluing it to the fuselage.
ChrisPinn - 11/11/2017
Reading the comment about P.1174 warping after doping, brings memories. Since the date was 1970, the dope used may have been Aerogloss or a similar buterate dope with plastizer in it to promote a good finish. I was told by a hobby distributor that it didn't completely cure for years. I seem to remember 7 years. This explains why after a few years my scale models skins would curl and of course, silkspan coverings would split. He was a free flight modeler and always used thinned nitrate dope for base coats with thinned other brands buterate color coats. I have had better success ever since. Much less worry today as Aerogloss is gone.
EdShearer - 13/11/2017
So many things we've forgotten. I had a similar problem recently with the center section sheet balsa on a wing. When I applied fiberglass tape to the joint (with glue not resin) the balsa warped pretty badly. Thankfully it was on the bottom where it wasn't seen very much. The cure of course is to use C grain quarter sawn balsa, much stiffer and will never warp. I learned this on a Top Flite Roaring 20 kit I built many years ago, wing covered with wet silk. The thin balsa furnished in the kit warped like a Pringles potato chip and I had to build a new wing. C grain balsa on the second try worked fine, stiff and no warps.
DougSmith - 13/11/2017
Hi Outerzone - I’ve almost finished this [pics 004, 005]. Initially designed as a FF model design from 1964…but updated at 125% original scale with working canards mixed to elevons, rudders and electric 3s on a 40a ESC and 6x5.5 prop. I managed to minimise differential with some experimental rudder servo placement! Maiden at some point in the future! Best Regards and many thanks for a superb site.
Andy Clune - 25/04/2023
So, I finally maidened her two weeks ago in a 5kt breeze - AUW with 3s 2200mah is 1.43kg. I settled on a 7x4 prop and after a long run, the climb out was ‘unexpectedly’ (and happily) uneventful. The finals approach glide was flat requiring little input to control descent rate. I did install an undercarriage after a hand launched CG glide test last year. Overall, very pleased and having set up plenty of expo on the ailevons, will be trying a few more flights before deciding whether to ‘scale up’. With a potential 2.5M fuse length, and built light with structural enhancements where the fuse meets the nacelle opening, it could be a very cool club plane! All the best, Andy
Andy Clune - 15/10/2024
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, 2011-2025.

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.