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Old Jun 17, 2008, 06:38 AM
Sensiblenick is offline
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Tearing the Skies a new one...
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Sweden: Ystad
Joined Oct 2004
4,013 Posts
Build Log
The Retox: Fully moulded Carbon Plank.

Well here we are again. thanks Jon for arranging this once more!

Infamous for never finishing I've set myself a serious task this time.

Concept:
I have a Jart, I have something that flips about the sky like a spring lamb on speed, and I have a 2.2 meter ship that will fly in nearly any conditions.... but what I don't have is something that I will happily leave in the car in case the conditions pop up... or a fast machine for light lift... or something I can take with me on a trip *just incase*

Also... I like my planes to look "potentially" real. I like a canopy shape that would offer a good view for any occupants... Laugh all you like...

Intended Specs.
1.15 meter span, hollow moulded with a target weight of 400-500 grams... capable of being ballasted if you fancy.
The aim is to get fast flight in minimal lift conditions, sacrificing the ability to rip tight turns in favour of being able to carve up the sky in graceful manouvers.
The format will be a pleasingly PNF fuselage with removable wings. Each wing panel will measure 550mm from root to tip.
I intend to keep this machine as efficient as possible, using wiper-seals on the elevons, and maybe an RDS linkage to drive them - I'm still looking into that.

For some time now I have been discussing this project with Peter Wick (of PW51 fame). Right from the start he very kindly offered to give input... And now - aside from the advice-laden conversations - he has put a lot of time into designing 3 bespoke profiles and a specific wing plan-form. The plan-form has a total of 9 profile changes based on the above spec' and desired flying characteristics.

Please note: At Peter's request the profile coordinates will not be made public. If you wish to learn more about them, please contact him yourself. I hope that he and I will end up standing shoulder-to-shoulder testing a pair of these before the contest is through.


Naturally, the smallest differences in a profile can mean large changes in performance. Peter's work in the area of plank 'foils is legendary and I want to do them justice. With this in mind, a friend at work is helping to model this glider and then programme the relevant tool-paths. The entire thing will be moulded using machined and polished aluminium moulds. He's doing it because he's damned fast and good at it.... and he enjoys it. in return he'll learn to fly, and get a serious toy once he's ready for it... also, I have little experience with the "ProNC" add-on for ProEngineer whereas he has worked with it and surface modelling for years.


So far There is little work done. Modelling the plane takes relatively little time compared to programming tool-paths, and laying up a plane in moulds takes relatively little time compared to polishing the moulds to a shine...

However.. working out how to make the most of the moulds initially takes a lot of thinking.. and that's where I am at the moment.

*************
Only with the express permission of SensibleNick is it ok to re.produce this material or to make plans of this plane.
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Last edited by Sensiblenick; Apr 15, 2009 at 07:51 AM.
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