Buhl Bull Pup (oz2254)
About this Plan
Buhl Bull Pup. Scale free flight model of the 1930s light plane. For .049 power. From Air Trails, Plan#1050.
Quote: "A gem for the free flight scale enthusiast - and we see those scale stunt men grabbing this one but quick. Buhl Bull Pup, by Charles Hollinger.
Twenty years ago the Buhl Aircraft Co. announced their new lightplane the 'Bull Pup.' Several versions were produced with wingspreads ranging from 27 to 36 feet. This resulted in either a high top speed plus high landing speed with the small wing, or a slight sacrifice in speed for slower landings and higher ceiling with the 36-foot wing installed.
The Pup seated one occupant, had a three-cylinder Szekely in the nose and a top speed of 90 mph, which was doing right well for only 45 horses. The fuselage was of all-metal monocoque construction. It was one of the first lightplanes to use this advanced feature.
Our model happened to be one of those last-minute affairs built for entry in last year's Nationals. In spite of the rush job it received the highest points for workmanship and scale of all the rubber-power flying scale entries, dropping to third, however, when the flight points were added. This was with two official flights since the rubber motor broke on the third wind-up, necessitating repairs to the fuselage.
AT's editors saw the Pup at the Nats and thought it would make a good Half-A flying scale. The changeover from rubber to gas power was very simple and has resulted in not only an attractive display scale model but one that is an exceptionally stable and a realistic flyer as well.
The real cylinder fits into the nose so perfectly that it takes at least a second look to discover 'which triplet has the piston.' Any of the small motors from .035 to .049 may be used for free flight. If you would like to convert the Bull Pup into a scale control liner, the best performance would be with .074 to .099 motors.
The fuselage may be started by laying out two strips of 1/8 x 3/16 over the top view of the plans. Use pins to hold them in place along the fuselage outline. This wil furnish the crutch onto which the fuselage formers will be attached..."
Update 19/02/2019: Added article, thanks to RFJ.
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
Buhl Bull Pup
by Chuck Hollinger
from Air Trails
Tags: Scale IC R/C Civil
all formers complete :)
got article :)
Found online 15/01/2012 at:
Format: • PDFbitmap
Credit*: challenger_i, Uncle Willie
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.