Ultra Hogan (oz2647)

About this Plan

Ultra Hogan. Free flight power model. Publicado en Air Trails en Noviembre de 1953. Span 54 inch.

Update 7/6/2025: Added article, thanks to RFJ.

Quote: "There seem to be two or three schools of thought nowadays as to what is the best way to go about getting at least three six-minute flights. Some build very lightly constructed barn doors and reluctantly hang a sick mill in front and hope to glide their way to glory. Another approach is just the opposite - they hang all their hopes on that very hot bean scorcher in front (which probably did 125 mph in a speed job!). Still others attack also from the glide angle but try to attain it by some archaic method such as fancy high lift, high drag, high-looping wing airfoils.

Well, as you might have suspected I believe in altitude! Engine power is a way to get altitude, but that power must be utilized. It should be converted to a smooth clean climb pattern which naturally draws the most out of the model and the engine. These extreme all-power jobs spend much of their zip going all over the sky and usually not up. Up is the word we are interested in, so let's hear about the model that does it with a capital U. The Ultra Hogan represents that capital U of 'Up,' and also of 'Ultimate.' The Ultra is a low drag airplane, this being achieved through the use of low cross section, a clean, functional configuration and a wing airfoil which allows the model to reach a climbing speed that makes these low drag factors pay off.

Believe it or not, with all this the Ultra is a very good gliding ship! I think , the low drag paid of here too. Keep the weight down to around 22 to 25 ounces. You can do this and still not skimp! Just be very careful in selecting the lightest, strongest wood for its weight. Use especially lightweight wood in the stabilizer. A parachute dethermalizer is recommended with a dependable air timer for release. A simple four-cornered, square piece of rayon with a hem sewed around the edges does the job of bringing it down. Sixteen inches square is the right size, with about a six foot lead secured to the rear of the ship. If the chute seems to have too much effect and tends to dump the model out, lengthen the lead. Go the other way if it doesn't bring it down fast enough.

Before we get started I think I should tell you about a couple of other outstanding virtues of this ship. Consistency is one and ruggedness the other. The Ultra represents just about maximum in these departments! I have been flying mine for over a year and a half and it has never crunched once. (Affidavit: the accompanying picture was taken just before this article' was sent in.) Ready at the work bench?

Fuselage: Author's foreword: I think the most accurate kind of construction is to separate a wing, stabilizer, engine into a grouping in which important factors such as wing incidence, moment arms, etc, can be easily checked and proper trimming installed during the initial construction rather than later as an afterthought.

Step One: Select one straight medium-light piece of 3/8 x 3/16 for 'backbone' and 3/16 x 5/8 for pylon, TE and center piece. Assemble these flat on plans and let dry..."

Supplementary file notes

Article.

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