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by coachchuckaahs
Today, 7:57 am
Forum: Flight B/C
Topic: Flight B/C
Replies: 118
Views: 59023

Re: Flight B/C

Please note: Ray Harlan does have rubber strippers in stock, he just made a batch of 100. His website shows no order form, you need to contact him by the email that is on his site, https://indoorspecialties.com/. I do not know the current price of his rubber stripper, but it should be around $200. C...
by coachchuckaahs
April 16th, 2024, 7:54 am
Forum: Flight B/C
Topic: Plane stalling after launch
Replies: 4
Views: 93

Re: Plane stalling after launch

I agree with coach Brian that we need more information to help you out. However, reading between the lines, it appears that when you are putting max winds on the motor, you are not backing off to launch torque. This is way too much power, and you likely are power stalling. But if you were not, the p...
by coachchuckaahs
April 8th, 2024, 4:41 pm
Forum: Flight B/C
Topic: Flight Seminars and Events
Replies: 4
Views: 11242

Re: Flight Seminars and Events

On the Discord server some were asking for a video or resource to introduce flying opportunities beyond SO. Specifically, Academy of Modell Aeronautics (AMA) events for indoor free flight. Ends up I already had a video on this topic. It can be found at https://www.youtube.com/watch?v=7AFV3Cd3H-w You...
by coachchuckaahs
April 7th, 2024, 5:41 pm
Forum: Flight B/C
Topic: Torque Calculation for a particular motor
Replies: 7
Views: 181

Re: Torque Calculation for a particular motor

And it was Coach Brian doing that video, not me. But an excellent resource!

Coach Chuck
by coachchuckaahs
April 7th, 2024, 4:55 am
Forum: Flight B/C
Topic: Torque Calculation for a particular motor
Replies: 7
Views: 181

Re: Torque Calculation for a particular motor

Should not matter
by coachchuckaahs
April 5th, 2024, 4:30 pm
Forum: Flight B/C
Topic: Increase flight time
Replies: 34
Views: 797

Re: Increase flight time

OK, the half motor then is 0.065g/in, and the full motor 0.0659g/in. This is not nearly as big a difference in density (though both are rather heavy motors). The other difference is that the half motor is tired (5th flight) while the full motor is fresh (1st flight), which is going to make the half ...
by coachchuckaahs
April 5th, 2024, 3:20 pm
Forum: Flight B/C
Topic: Increase flight time
Replies: 34
Views: 797

Re: Increase flight time

Your rubber data is somewhat confusing. Let's look at the full motor. You report 1.5g rubber plus 0.04g o-ring, with a length of 55.5cm. I presume this length is the length of the rubber that weighed 1.5g. There is no need for a calculator, this is simply density = mass/length, = 1.5g/55.5cm*2.54cm/...
by coachchuckaahs
April 5th, 2024, 10:41 am
Forum: Flight B/C
Topic: Increase flight time
Replies: 34
Views: 797

Re: Increase flight time

Yes, that is a challenge with no rubber stripper!

If you can match density, the data should match X2

Coach Chuck
by coachchuckaahs
April 5th, 2024, 5:47 am
Forum: Flight B/C
Topic: Increase flight time
Replies: 34
Views: 797

Re: Increase flight time

One of the keys to comparing half and full motor tests is keeping everything the same. In your testing, the full motor was substantially more dense (062 vs 058) than the half motor test. This is a 7% change in motor density! Your number of turns or fraction of breaking was not reported for the half ...
by coachchuckaahs
April 4th, 2024, 5:14 am
Forum: Flight B/C
Topic: Increase flight time
Replies: 34
Views: 797

Re: Increase flight time

Jeff: You are correct. Last year they removed the requirement for SI but still had a statement that standard units appropriate to the dimension measured must be used. That requirement was removed this year. So, strictly by the rules as written, you can potentially use any units. I would still avoid ...

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