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Old Dec 12, 2001, 06:27 PM
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tim_j-rome's Avatar
Toronto, Ontario, Canada
Joined Dec 2001
166 Posts
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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Old Dec 12, 2001, 06:29 PM
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Toronto, Ontario, Canada
Joined Dec 2001
166 Posts
pic

here you go.
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Old Dec 12, 2001, 06:30 PM
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Toronto, Ontario, Canada
Joined Dec 2001
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pic3

here...
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Old Dec 12, 2001, 06:36 PM
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Toronto, Ontario, Canada
Joined Dec 2001
166 Posts
This is what happens when the prop hits something

no broken prop!
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Old Dec 12, 2001, 06:39 PM
Houng-wen Lin
GWS4CEO's Avatar
Shijr, Taiwan. DungGwan, China. City of Industry, California.
Joined Sep 2001
19,445 Posts
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.
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Old Dec 12, 2001, 08:06 PM
Crash Master
Gene Bond's Avatar
Indianapolis, IN
Joined Sep 2001
16,632 Posts
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!
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Old Dec 12, 2001, 08:08 PM
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tim_j-rome's Avatar
Toronto, Ontario, Canada
Joined Dec 2001
166 Posts
prop saver

lol...i'm glad to hear it went together well. Let me know how it works out for you.
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Old Dec 12, 2001, 08:38 PM
Crash Master
Gene Bond's Avatar
Indianapolis, IN
Joined Sep 2001
16,632 Posts
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!
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Old Dec 12, 2001, 10:54 PM
Registered User
Joined Sep 2001
17 Posts
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
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Old Dec 12, 2001, 11:30 PM
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Joined May 2000
2,837 Posts
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
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Old Dec 12, 2001, 11:43 PM
Most Exalted Windbag
Newark, DE USA
Joined May 2001
1,632 Posts
Dittos on what Bleriot said.

FANTASTIC!

Way to go Tim!!! Thanks!

Anything else you have to share Tim?

RB
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Old Dec 13, 2001, 09:41 AM
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tim_j-rome's Avatar
Toronto, Ontario, Canada
Joined Dec 2001
166 Posts
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
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Old Dec 13, 2001, 10:12 AM
RPV builder & operator
Pierre Audette's Avatar
Canada, QC, Gatineau
Joined Jan 2001
2,303 Posts
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.
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Old Dec 13, 2001, 12:21 PM
Stuck on a rock
epilot's Avatar
Germany, NDS, WOB
Joined Nov 2000
5,922 Posts
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
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Old Dec 13, 2001, 02:13 PM
Most Exalted Windbag
Newark, DE USA
Joined May 2001
1,632 Posts
Hi epilot,

Also very cool.

Youse guys is sumppin".

RB
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