About this Plan
Burp. CL Mouse racer for .049 power.
Quote: "Mouse Racer for .049's (.8 cc). Full Size Plans on Centre Pages for this Ultra Simple C/L Design. Burp, by Tom Jolley.
Construction, in the main, has been kept simple. The only dodgy step is the drilling of the fuselage for the undercarriage leg. Unfortunately, despite much dandruff disturbance, it's the best idea we can come up with.
Balsa cement was not used on the originals at any point because of the ply parts. Araldite, now available in small quantities, is recommended for the joints that you can leave for a number of hours. Those requiring speedier treatment were fixed with Holts Cataloy paste u- seable time about four minutes, and workable after 20-30 minutes.
Now, to the bench, kitchen table, grand piano lid or what-have-you. We always suggest, but never do it - chop out all the parts after you have decided what engine to use. Ensure that the tail slot in the ply fuselage is parallel to the top edge. Cut out the spar slot in the wing and glue the spar in place. Carefully round off all the edges of the tailplane and elevator with very fine glass paper, which should be wrapped around a 6 in length of planed 2 in x 1 in hardwood to give much better control. Finish all edges and surfaces (except wing at this stage) with grade 400 wet or dry paper, used dry.
Hack the wing to the closest approximation that you can manage to the shape shown on the plan. Again finish with glass paper and 400 Wet or Dry paper.
Drill the ply section of the fuselage and having bent the upper part of the leg, push it down through the fuselage. Trim underneath of the wing to seat correctly on the ply.
Sticking time. Attach wing and tailplane to plywood half of fuselage. Check that they align perfectly to each other both in plan, side, and end views. Attach engine former if using radial mounted motor (no offsets necessary). Glue balsa top to fuselage...."
Direct submission to Outerzone.
Hi Steve - Here is Tom Jolley's Burp from Aero Modeller magazine issue 01-69. This was a full size center page plan from this issue.
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User commentsI built my "Burp" from the full size plans shortly after being published in Aeromodeller back in 1969. Even with a lowly Babe Bee, the model was fast. Remarkable as it seems, we actually flew it while sitting in a swivel chair! I still have the chair all these years later, but never tried this trick again.
My new "Burp" has a Cox Black Widow - and is even faster [main pic, 003]. It's rock solid smooth on the end of the lines - but some dizziness is training required!
Video here: https://www.youtube.com/watch?v=cur8MIzz4I8
ChrisMoes - 02/11/2020
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