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by calgoddard
April 1st, 2019, 4:40 pm
Forum: Wright Stuff C
Topic: Wright Stuff C
Replies: 799
Views: 111124

Re: Wight Stuff C

I had a nice explanation that I typed, but some software error in this website inserted lots of spelling errors. So I deleted the same.

Short answer - never braid a WS rubber motor.

Braiding of rubber motors is only used with outdoor models to prevent motor bunching and CG shifting.
by calgoddard
March 18th, 2019, 7:31 am
Forum: Wright Stuff C
Topic: Wright Stuff C
Replies: 799
Views: 111124

Re: Wright Stuff C

Here is a link to another video recently posted that shows the winding technique described in my March 13, 2019 post in this topic:

https://www.youtube.com/watch?v=nhYSSM8YZVA

The torque meter is not visible in this video. The rear end of the rubber motor is connected to the torque meter.
by calgoddard
March 13th, 2019, 6:58 am
Forum: Wright Stuff C
Topic: Wright Stuff C
Replies: 799
Views: 111124

Re: Wright Stuff C

As Coach Chuck indicated in the previous post “perfectly wound” is a relative term. Extensive practice will first be necessary in order to determine the optimum rubber motor size and optimum launch torque that will cause the model to climb to a max height just below the beams and/or light fixtures a...
by calgoddard
March 10th, 2019, 4:08 pm
Forum: Wright Stuff C
Topic: Wright Stuff C
Replies: 799
Views: 111124

Re: Wright Stuff C

Brian has given excellent advice, as usual. I would like to expand on this topic so that you understand that employing a torque burner is only something to try after you are already consistently flying over 3 minutes in a typical-size high school gym with an airplane that meets the specifications of...
by calgoddard
February 20th, 2019, 12:03 pm
Forum: Wright Stuff C
Topic: Rubber Motor lenght / Motor Stick length
Replies: 13
Views: 3819

Re: Rubber Motor lenght / Motor Stick length

A slightly higher blade pitch on the prop of the model in the video would have used up the turns at a slightly lower rate with the same rubber motor. However, the usual practice by experts is to adjust the length of the rubber motor, while maintaining the same rubber motor weight, in response to a m...
by calgoddard
February 20th, 2019, 9:46 am
Forum: Wright Stuff C
Topic: Rubber Motor lenght / Motor Stick length
Replies: 13
Views: 3819

Re: Rubber Motor lenght / Motor Stick length

Practice in your gym with one-third partial motors. By way of example, if your best results have been achieved flying with a 2.4 gram rubber motor that is X cm long, then make up rubber motors that are 0.8 grams and 1/3 X cm in length. Use a partial motor stick has a length that is 2/3 of the length...
by calgoddard
February 20th, 2019, 8:24 am
Forum: Wright Stuff C
Topic: Rubber Motor lenght / Motor Stick length
Replies: 13
Views: 3819

Re: Rubber Motor lenght / Motor Stick length

Never fly an overweight model in competition, unless your No. 1 model has become stuck or got broken on your first official flight and your No. 2 model is overweight and that is all you have to fly for your second official flight. You do not have sufficient time to make and test repairs during your ...
by calgoddard
February 19th, 2019, 10:23 am
Forum: Wright Stuff C
Topic: Rubber Motor lenght / Motor Stick length
Replies: 13
Views: 3819

Re: Rubber Motor lenght / Motor Stick length

For an indoor duration rubber powered stick model, such as a Wright Stuff model, optimum motor stick length, optimum overall model length, and optimum rubber motor size are separate, but related concepts, in terms of achieving maximum flight times. Rubber motor length by itself is not a useful param...
by calgoddard
February 8th, 2019, 11:59 am
Forum: Wright Stuff C
Topic: Wright Stuff 2019 - Designs
Replies: 16
Views: 4253

Re: Wright Stuff 2019 - Designs

Ikara props are relatively expensive. In my experience, their plastic film blades often detach from their injection molded plastic spars. The blades on the same Ikara prop are often unequally pitched. The P/D ratio of an Ikara prop is too low for optimum indoor performance. It is very difficult to a...
by calgoddard
January 17th, 2019, 4:27 pm
Forum: Wright Stuff C
Topic: Wright Stuff 2019 - Designs
Replies: 16
Views: 4253

Re: Wright Stuff 2019 - Designs

The Plans Gallery on the Hip Pocket Aeronautics web site also has the plan for the LIL STUBBY II available for download. It was designed to meet the 2015 Wright Stuff rules. The plan for the LIL STUBBY II can be re-scaled to meet the 2019 Wright Stuff Rules. This design is a bit unconventional in th...

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