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Dec 12, 2001, 06:27 PM
Registered User
tim_j-rome's Avatar
Yippee!

Save those Props!!!


I have just found a way to make a cheap and easy prop saver. All you need is a small four arn servo arm (with two of them cut off), two small elastic bands, and a prop! (oh...and of course that beloved GWS gearbox). Just follow the pics below. If you have any questions, just write back.
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Dec 12, 2001, 06:29 PM
Registered User
tim_j-rome's Avatar

pic


here you go.
Dec 12, 2001, 06:30 PM
Registered User
tim_j-rome's Avatar

pic3


here...
Dec 12, 2001, 06:36 PM
Registered User
tim_j-rome's Avatar

This is what happens when the prop hits something


no broken prop!
Dec 12, 2001, 06:39 PM
Houng-wen Lin
GWS4CEO's Avatar
Smart ideal.

But I would like to suggest to let servo-horn to be more deep inside to shaft. So you still can put GWS soft rubber spinner to protect someone be hitted.
Dec 12, 2001, 08:06 PM
Crash Master
Gene Bond's Avatar
Excellent!!!!!

Took all of 5 minutes to do. It helps to have a son in braces!

He sure looked at me funny when I said "give me about half a dozen of your rubber bands"

Maybe that $4000 was worth it... I get free rubber bands for my prop savers!
Dec 12, 2001, 08:08 PM
Registered User
tim_j-rome's Avatar

prop saver


lol...i'm glad to hear it went together well. Let me know how it works out for you.
Dec 12, 2001, 08:38 PM
Crash Master
Gene Bond's Avatar
I also hacked about 3/8" off the end of the shaft with my dremel. I left enough to get a GWS prop on there, but not an APC -- Bet that make Mr Lin Happy

Also, I leave the spinner off, in case I hit a little kid in the head, I want it to stick, so He won't trip over it when running to his mommy crying! I am after all concerned with his safety. Wouldn't want him to twist an ankle or anything!
Dec 12, 2001, 10:54 PM
Registered User
Cool Idea!


If you use a oversize washer on the outside of the shaft
you give the prop more surface area to rest on making it
spin a little truer.

If you use a large enough control horn you can mount
even the APC E props
Dec 12, 2001, 11:30 PM
Registered User
Bleriot's Avatar

IMPROVISATION GURU


Well done. In 2 or more years of these motors in operation, here comes a new member ,Welcome to the Ezone Tim,and devises some very useful device without resorting to sheet steel/brass/aluminum, cutting, drilling etc, using something we all have some spares of. Great Idea, I vote this guy gets nominated for the best idea 2001 in the Ezone Hall of Fame (do we have one yet?) there goes the GWS prop saver $$$ Mr Lin unless you can make cheaper? Best Regards
Dec 12, 2001, 11:43 PM
Most Exalted Windbag
Dittos on what Bleriot said.

FANTASTIC!

Way to go Tim!!! Thanks!

Anything else you have to share Tim?

RB
Dec 13, 2001, 09:41 AM
Registered User
tim_j-rome's Avatar

WOW!!!


hey guys, thanks for all of the compliments. I'll try that idea about the bigger washer on the end of prop shaft. Thanks again

-->Tim
Dec 13, 2001, 10:12 AM
RPV builder & operator
Pierre Audette's Avatar
There's an article on rcmicroflight on this, but suggesting cutting/shaping/filing a small thin piece of brass. Must admit that the servo horn is a much easier approach. The article also suggests cutting the shaft so that only 0.085" of the threaded portion still shows. Probably need a little more for the tickness of the horn. Keeping the prop closer to the gearbox should minimize any unwelcomed vibration.
Dec 13, 2001, 12:21 PM
Only nerd in the village
Here is another method that could be used on the GWS drive as well. Its just a piece of piano wire, paper clip etc. bend to fit through the holes in the gearwheel and having the ends bent to form hooks. Of course you would have to shorten the output shaft.



Michael
Dec 13, 2001, 02:13 PM
Most Exalted Windbag
Hi epilot,

Also very cool.

Youse guys is sumppin".

RB


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