Knight Twister (oz457)


Knight Twister (oz457) by Walt Schroder 1944 - plan thumbnail

About this Plan

Knight Twister. Gas U-control by Walt Schroder from 1940's Air Trails.

Quote: "The Twister, designed by Vernon Payne in 1932 has always been of interest to builders because of its small 15-foot span and beautiful lines.

This control-line Knight Twister is a compromise between speed models and the so-aptly named 'Goats'. The prototype's well known lightplane history and the opportunity to combine exciting scale-model possibilities with a reasonable rate of speed, make her an ideal project for scale control-line fans. Simplicity is the keynote of the entire construction The sturdiness and flyability of the plane will permit the use of a Forster 29 or 305, or even any other small, class C motor.

The use of a biplane with its increased wing area permits the average control-line flyer to land this model without incorporating all sorts of complicated gadgets to blip the motor, throttle control, or spark control. Its ability to glide the model after the motor cuts offers all sorts of possibilities for stunting and regular flight maneuvers.

Fuselage. A conventional crutch of 1/4 x 1/2 is used. Glue all upper formers in place while the crutch is drying, then install the control system. Make a platform of 3/32 sheet and glue it on top of the crutch at the center of station #3. The control fulcrum of 3/32 in plywood is mounted on the platform, with an ordinary #9 wood screw acting as the anchor and bearing point of the fulcrum. Be sure to use a small clipper burr between the head of the wood screw and the control plate, plus two copper burrs between the bottom of the control plate and the plate platform.

Glue all stringers and the front nose block in place before planking the model with 1/8 x 1/4 soft balsa planking..."

Update 26/07/2016: Replaced this plan with a clearer copy, thanks to JJ. This one is 400dpi, scanned from a fullsize print.

Supplementary file notes

Article pages, text and pics, thanks to BillW. Also, previous scan version (this is not a fullsize plan).


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Knight Twister (oz457) by Walt Schroder 1944 - model pic


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Knight Twister (oz457) by Walt Schroder 1944 - pic 003.jpg
Knight Twister (oz457) by Walt Schroder 1944 - pic 004.jpg

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User comments

Comparing the plan to the photographs there should be a central rib on the upper wing with of course one further 'bay' (to the next rib. Only ten are apparent on the 'half plan' given? No drawing is given showing the central rib plus the extra 'bay'. This is the universal error on all the Walter Schroder plans. It is a source of frustration as I am trying to construct a model Knight Twister of this variant and only this plan seems to exists. Any help most appreciated. Thanks!
SuperG - 22/03/2021
The plan looks OK to me. Looks like the upper wing-half has 10 ribs, and rib no 1 is the center rib. Which photograph are you comparing it to? You mean the photo on the plan showing framework?
SteveWMD - 22/03/2021
Super G - A long time ago I asked myself the same thing. Back then, after pondering over the photo (the one on the plan) versus the actual plan for quite a while, it suddenly dawned on me... Due to the angle that the photo of the plane was taken from, the rib that appears to be the central rib is actually the No. 2 rib of the right wing panel. The actual center point of the wing in the photo is the rib that sort of lines up with the left edge of the fuselage; an optical illusion due to angle. To put it another way, if you count ribs in the photo starting from the left, the 10th rib is actually the center of the wing (and is actually the two No. 1 ribs of each panel glued together and glued to the pylon center notch). The whole wing, after its built, looks as if there are nineteen ribs (but its actually twenty ribs, the two No. 1 having been glued together as one at the center), and rib No. 10 of the right wing panel (which would be the nineteenth rib counting from the left) is not visible in the photo. Sorry for the long winded reply, but it isn't easy to explain, let alone visualize. Hope this helps.
RC Yeager - 23/03/2021
Correction: the nineteenth rib (No.10 of the right panel) is visible in the plan photo. I was looking at the copy of that same photo posted in Outerzone's plan detail page and that one is cropped. Anyway, everything else about my explanation still stands. Cheers
RC Yeager - 23/03/2021
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  • Knight Twister (oz457)
  • Plan File Filesize: 1569KB Filename: Knight_Twister_CL_oz457.pdf
  • Supplement Filesize: 347KB Filename: Knight_Twister_CL_oz457_article.pdf
  • Supplement Filesize: 478KB Filename: Knight_Twister_CL_oz457_previous.pdf
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