Sir Jasper (oz4163)


Sir Jasper (oz4163) by AN Searle 1970 - plan thumbnail

About this Plan

Sir Jasper. Radio control sport model.

Plan includes full build instructions.

Quote: "Sir Jasper is a simple model to build yet is full of character, and most important of all, great fun to fly. It may be flown rudder only, or with kick-up elevator if a compound escapement is used.

The fuselage construction is begun by marking out the sides on a sheet of 3/32 x 4 in balsa. Mark the positions of the formers, and cut out. Add the 3/32 x 1/8 diagonal braces, escapement rails and 3/16 square doublers for the wing seating. Cut out former F2, and make up F3 from scrap. Add these formers to one side - checking for squareness. When dry, add the opposite side. Next, draw the tail end together, followed by the top and bottom sheeting - cross grained. Draw the nose together and add F1, using pins and sellotape to clamp it in position. Glue the top and bottom 1/4 in sheet to the nose section. Cut out the ply firewall, drill to suit the engine, and epoxy the bolt heads to the rear. Epoxy to F1. Add the Rx mounting rails then drill the holes for the wing and U/C dowels.

Make the port wing panel first. Pin the lower spar and leading edge to the building board, then cut out all the ribs and glue in position. When dry, add the TE, top spar and dihedral braces. Remove from board, and position in relation to the starboard panel, but with the tip packed up 3 in to allow for dihedral. Build the starboard wing panel flat on the board in the same way as the first. When dry, remove wing and sheet the upper surface of the centre-section. Add 1/4 in square supports for cabane struts,epoxy brass tubes in position, then sheet underside. Finally cement tip plates in position.

The tail and fin are cut from medium hard 3/32 sheet balsa. Cover the fuselage and tail with lightweight tissue, and the wings with coloured nylon to save weight. Apply colour dope sparingly - numerals etc may be black tissue doped on. The cockpit is from black fuel tubing, using an impact adhesive to secure it. Bend the U/C to shape and retain with rubber bands.

Install the RC equipment as shown, ensuring that the CG is positioned on the spar - move the batteries fore and aft to achieve this.

Finally, add the shirring elastic rigging - this really adds to the appearance and oh, don't forget 'Sir Jasper', the pilot!"

Direct submission to Outerzone.

Quote: "Hi Steve, Thanks for the great site, stirred many memories of my youth. I noticed you didn’t have a copy of the Sir Jasper plan..."

Supplementary file notes

Planfile includes article.


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

Sir Jasper (oz4163) by AN Searle 1970 - model pic

  • (oz4163)
    Sir Jasper
    by AN Searle
    from Aeromodeller
    April 1970 
    42in span
    IC R/C
    clean :)
    all formers complete :)
    got article :)
  • Submitted: 26/03/2013
    Filesize: 522KB
    Format: • PDFbitmap
    Credit*: AllanVoyce
    Downloads: 2590

Sir Jasper (oz4163) by AN Searle 1970 - pic 003.jpg
Sir Jasper (oz4163) by AN Searle 1970 - pic 004.jpg
Sir Jasper (oz4163) by AN Searle 1970 - pic 005.jpg
Sir Jasper (oz4163) by AN Searle 1970 - pic 006.jpg
Sir Jasper (oz4163) by AN Searle 1970 - pic 007.jpg
Sir Jasper (oz4163) by AN Searle 1970 - pic 008.jpg
Sir Jasper (oz4163) by AN Searle 1970 - pic 009.jpg
Sir Jasper (oz4163) by AN Searle 1970 - pic 010.jpg

Do you have a photo you'd like to submit for this page? Then email

User comments

The first photo [pic 003] shows my original Sir Jasper built from Aeromodeller full size plans (on brown paper - remember?) when they were first published in 1970. Power was a Cox Babe Bee .049 and the wing was covered with silk. The R/C system was Heathkit (3 channel) on rudder and elevator only. This photo was taken after 13 consecutive flights, with half of the tailplane having parted company at some point along the way. It seemed to fly just as well without it - a testament to this brilliant design.
The indoor flying photos (by Peter Smith) show my 1/2 size electric version in 2011 - with Depron flying surfaces and a balsa fuselage complete with dummy .049 cylinder [pics 004, 005]. A superb flyer!
ChrisMoes - 23/11/2020
Hello! Some views of my example [main pic & 006-010].
Norm - 14/04/2023
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.