BA Swallow (oz1591)
About this Plan
BA Swallow. Scale rubber free flight model of the 1930s two-seater low wing sports trainer.
From March 1943 Aeromodeller. The subject BA Swallow was a license-built version of the German Klemm L.25.
Quote: "General: This machine was in use extensively before the outbreak of war by flying clubs and private owners. It is a light plane of spruce and ply construction, ply covered, with a 90 hp Cirrus engine. The large area of the main planes, and their disposition, and the ample tail surfaces all make for a successful flying scale model of the machine.
Power: Two motors, each 4 strands 1/4 in by 1/30 in rubber.
Gearbox: Two gears 1/2 in diameter meshing, driving 1-3/8 in gear on prop shaft. Mounted on brass plates, front and rear, ballthrust races. Ratio of step-up = 17-17-13 =1.31-1 on prop.
Fuselage: First build two flat sides right on top of the plan, identical to each other, by laying down the longerons and the wing base former and, starting at the nose cutting and cementing in the diagonal bracing pieces Do not fit the patch plates around the wing base formers, or the rear motor anchorage plates, yet.
Erect the fuselage by assembling the two sides with the straight across crossmembers, and CBB1, CBR2 and CBB3 at the bottom, and frames 5, 6, 7, 8, 9, 10 at the top. True up and cement firmly. Next draw the tail-ends together and cement to the sternpost, holding with pins whilst the cement dries hard. Cut and insert all the diagonal cross-bracings from the rear cockpit to the sternpost, true up, and cement firmly. Cut the cross pieces for the nose, cement, and hold in by rubber bands until dry. Now cut and insert all the remaining diagonal braces, true up the whole fuselage finally, and put aside to set.
Now fit remaining decking frames, all stringers, patch plates inside fuselage at wing base formers, rear motor anchorages, tail skid, dowel tube for the tail unit, dashboards ; sheet in the nose with 1/16 sheet up to frame 4, and add the cowling formers, finally cementing on top and side cowlings of 1/64 in sheet.
Centre-section. Block up the fuselage with the top longerons level fore and aft and across. Slide in the twin spars through the holes in the WBF, packing them apart 1/8 in and 1/16 in respectively. Check for alignment and cross level, and before cementing firmly in place finally. cement on spar stiffeners; then cement spars to WBF. Now slot on the centre-section ribs on each side, check for 3 degree incidence and cement in place. Adding the LE, TE, undercarriage supports and plywood facing ribs completes the assembly. Cover centre-section in 1/64 in sheet..."
Supplementary file notes
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
by JL Roberts
Scale Rubber F/F LowWing Trainer Civil
all formers complete :)
got article :)
Found online 09/09/2011 at:
Format: • PDFbitmap
British_Aircraft_Swallow | help
see Wikipedia | search Outerzone
ScaleType: This (oz1591) is a scale plan. Where possible we link scale plans to Wikipedia, using a text string called ScaleType.
If we got this right, you now have a couple of direct links (above) to 1. see the Wikipedia page, and 2. search Oz for more plans of this type. If we didn't, then see below.
ScaleType is formed from the last part of the Wikipedia page address, which here is https://en.wikipedia.org/wiki/British_Aircraft_Swallow
Wikipedia page addresses may well change over time.
For more obscure types, there currently will be no Wiki page found. We tag these cases as ScaleType = NotFound. These will change over time.
Corrections? Use the correction form to tell us the new/better ScaleType link we should be using. Thanks.
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.