The Bob Schlosberg version of the Dippidy-Doo was originally a P-30 by Dick Williamson. Bob says, "Several years ago when Jim Kutkuhn was (in a terminal illness) he gave me a bunch of his stuff. Some of it were old newsletters dating back to the 70s and early 80s. Going through them I found this old Dippidy-Doo plan. The more I looked at it the more I liked it, but for me I had to make some changes which meant rounded wing and stab tips and wheels. I also flattened the area where the wing is positioned and moved the peg hoe (farther back) about 3/4". This 8·1/2" x 11" plan is all I had to work with. I enlarged it to 30" (wingspan) and had some fun building it. I changed quite a few positions of uprights in the nose area as well. I don't fly P-30, it never interested me, but my model meets most P-30 requirements but due to my building style, it's far too heavy to be competitive. With the amount of rubber allowed and the 9" Peck prop it is underpowered by a fair amount but it does fly - about 20-30 seconds - BUT I doubled the allowed motor weight for P-30, and it does close to two minutes with great altitude and is just as stable and relaxed a flyer as you'll want. In other words, it is not flying like a scalded eagle. (Editor: for these longer flights Bob used two loops of 3/16" rubber, 40" long and braided to a length of 32", 1,000 plus turns.) Model was built in 2005 and I had more fun just flying it as a sport model than the law allows." Editor says, "Dippidy-Doo a la Schlosberg" seems like just the model for those windy days that keep our usual types on the ground. Bob also made the following changes: a card-stock shim under the TE of the stab; a wire-hinged right rudder, about 3/4" x 2"; pegs for the rubber band that holds down the wing...And be sure to check the rib size against the enlarged chord of the wing.
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In regard to the DeHavilland DH71, it is probable that it has previously appeared in the FAC News, and we don't like to repeat what many of our readers have already seen, but the design is so unique for a DeHavilland of the "Moth" series, that it deserves the attention of those who are not FAC members. Our Web site receives about 5,000 hits per month, so there are probably many modelers out there who do not see the FAC News.....and might want to? In giving us permission to use his plan, Lloyd Willis says from Australia, "There were only a couple of them (the "real" DH71) built, and one of them came to Australia, but not much is known about it here now." We do know, though, that it first flew in 1927, powered by an 85 hp Cirrus II engine. When enlarged to the scale shown, a wingspan of 18" is the result. At this size, standard 1/16" balsa throughout seems reasonable, with four strands of 3/32" rubber driving a 6" plastic prop. The 3-view is so highly detailed that it suggests a more sophisticated model, enlarged to 24" to facilitate adding such things as cockpit details and engine features. Balsa sizes should be increased to 3/32" in such a case, except for wing ribs, half of which can be eliminated and kept at 1/16" thick..And of course, provision must be made for a removable nose block that will allow thrust line adjustments.
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