High Diver (oz1550)

 

High Diver (oz1550) by Bill Winter from Model Airplane News 1954 - plan thumbnail

About this Plan

High Diver. Radio control stunt model. April 1954 MAN.

Quote: "After deBolt's experiments with the full symmetrical airfoil and short coupling, a la the U-control stunt, the High Diver was begun as a more moderate experiment, using convex undercamber (NACA 2412 airfoil) in combination with both rudder and elevator. Not only did results warrant this plan, but a number of interesting possibilities were revealed.

The elimination of ballooning is, perhaps, the most important. The minimum airplane that would incorporate sufficient structural strength to survive anticipated air loads imposed, by violent pull-outs, and, perhaps, inverted maneuvers, carrying two escapements and a really reliable complement of batteries, appeared to be approximately 3-3/4 lb gross (spun in on dirt, it broke a prop), which, at about 18 oz per square foot of area, works out to a little under 5-ft. span. To gain area without excessive span, an aspect ratio of about 5-3/4 to 1 was employed. The combination of airfoil selected and rather high weight meant a fast moving ship during elevator maneuvers, so moderate power, a K&B .15, was called for. A .19 would be murder on a small fast ship using flippers that really react, but will go nicely in a rudder-only version where high performance is desired. A 9 x 6 Power Prop allowed the .15 to rev up; despite the high pitch, the engine would over-rev in inverted dives, sounding like a speed ignition engine with floating points. Although a wedge tank, point down, will run off during any normal rudder-only maneuver, abrupt pull-outs impose G-loads chat compel a Walker pressure tank.

Flight characteristics, generally more like full scale than model, were different from any seen in 12 previous, more orthodox, layouts, so much so, in fact, that we misinterpreted hand glide symptoms and put the ship away for two months, thinking it a failure..."

Update 24/04/2017: Added article pages, thanks to buzzardbait.

Supplementary file notes

Article.

Corrections?

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

High Diver (oz1550) by Bill Winter from Model Airplane News 1954 - model pic

Datafile:

High Diver (oz1550) by Bill Winter from Model Airplane News 1954 - pic 003.jpg
003.jpg

Do you have a photo you'd like to submit for this page? Then email admin@outerzone.co.uk

User comments

Changed this listing now to show designer as Bill Winter (not PDG).
SteveWMD - 24/04/2017
Add a comment

 

 
 

Download File(s):
 

Notes

* 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.

Scaling

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.

 

Terms of Use

© Outerzone, 2011-2021.

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.