OH NO! Not another Prop Saver!! - RC Groups
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Jan 24, 2004, 03:26 AM
T:W>1= :>)
rc-eflyer's Avatar
Idea

OH NO! Not another Prop Saver!!


No more broken props for me!!.....yeah, right

Anyway, while tring to come up with a way to attach a
propsaver to my PJS300 without using any glue on the
little guy I discovered that a piece of 3/16" tubing fits very
nicely "on" the 4mm motor shaft Also fits very nicely "in"
a 3/16" wheel collar. Now just drill and tap a 6-32 hole
opposite the one already in the collar, add 2 short 6-32 cap-
head screws........Voila........a nifty propsaver that only
weighs 3gms. Fits APCs with the included adaptor but you
have to drill the GWS to 3/16" . Adjust the length of the
tube so the prop can pop off easily in a.........well, you know
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Jan 24, 2004, 08:35 AM
Registered User
747drvr's Avatar
Just wondering why you don't use a 5/32" wheel collar instead of sleaving with the tubing ?

Marc
Jan 24, 2004, 10:18 AM
Right Honorable Member
flatfour's Avatar
The tubing is the part that becomes the "shaft" that the prop goes on.
Jan 24, 2004, 12:43 PM
T:W>1= :>)
rc-eflyer's Avatar
Quote:
Originally posted by 747drvr
Just wondering why you don't use a 5/32" wheel collar instead of sleaving with the tubing ?

Marc
Like flatfour said
Jan 24, 2004, 12:57 PM
LSF 004 - AMA 5055
bobandris's Avatar
Just a FWIW. For my PJS & Nippy, I use a GWS prop saver (the one with the same size hole as the shaft diameter) epoxied onto the shaft and front bell. Strong as hell!

Bob
Jan 24, 2004, 03:34 PM
Registered User
GWS prop savers have been known to break. Getting off an old, broken GWS prop saver that has been epoxied to a motor shaft is not my idea of an afternoon of fun.
Jan 24, 2004, 04:06 PM
Impossible? Hah!
KreAture's Avatar
Here's mine. I needed something I could just attach to the shaft of my GWS gearboxes with minimal effort:



Basically it's a 3M wingnut. I filed the inner edges of the wings a bit to allow a small nut to contact it. This makes it lock-able anywhere on the shaft.

Later, for my EPC 300C I found that dropping the extra nut, and screwing the wingnut all the way onto the shaft was better. Then I cut off the excess shaft letting a 6mm tip stick out. Result is a much shorter shaft on the EPS 300C so it is less prone to bending. The wings are great for attaching the prop with rubber bands and this solution is much cheaper than using wheel collars and stuff. It cost me about 10 cents for 4 such wingnuts.
Jan 24, 2004, 04:21 PM
De-Brushed user
Kreature: That wingnut idea is the best ive seen yet! Im going to go pick some up this afternoon. I used to wear braces, with some really strong rubberbands, should make a good combination. Thanks for the idea
Jonathan
Jan 24, 2004, 07:33 PM
Registered User
Terry I's Avatar
go nylon, wingnut
https://www.rcgroups.com/forums/show...29#post1744729
Jan 24, 2004, 08:06 PM
Impossible? Hah!
KreAture's Avatar
yes, nylon wingnut is better, but I couldn't get one.
Jan 26, 2004, 10:02 AM
Proud Pro Bro # 13
Ulf Rieder's Avatar
ahhhh........ great prop saver rc-eflyer !
Just what I was looking for. I really hate the idea of using glue on the prop shaft too.
I assume you glue the tube into the wheel collar and then drill through the tube so the screw can be tightened to the shaft, or is that not necessary ?

Ulf
Jan 26, 2004, 10:47 AM
Impossible? Hah!
KreAture's Avatar
Sounds unnecessary... After all aluminum is soft and should be easily defromed by the two screws, allowing a tight grip on the shaft.

I still like using a nylon or metal wingnut instead. Nylon will save about 1-2 grams of weight so it's preferable.
Jan 26, 2004, 05:52 PM
T:W>1= :>)
rc-eflyer's Avatar
Quote:
Originally posted by Ulf Rieder
ahhhh........ great prop saver rc-eflyer !
Just what I was looking for. I really hate the idea of using glue on the prop shaft too.
I assume you glue the tube into the wheel collar and then drill through the tube so the screw can be tightened to the shaft, or is that not necessary ?

Ulf
Like KreAture said, not necessary. The aluminum crushes
very easily. The way I make them is to put the collar in
a vise with the original set screw hole facing up (use a
drill press for best results) and drill thru that hole straight
thru the other side. Then take your tap and thread it thru
the original threads and right on thru the hole you just made.
That assures the 2 cap screws will be exactly on the same
plane and 180 degrees apart. Glad you like it.
Jan 29, 2004, 04:14 PM
Proud Pro Bro # 13
Ulf Rieder's Avatar
OKmbuild me one and it was pretty easy and quick to do. I used a rubber band, but will give the O-ring idea a try. What O-ring size do you use ? Just so I know what to buy. Thanks

Ulf
Jan 29, 2004, 05:27 PM
T:W>1= :>)
rc-eflyer's Avatar
Quote:
Originally posted by Ulf Rieder
OKmbuild me one and it was pretty easy and quick to do. I used a rubber band, but will give the O-ring idea a try. What O-ring size do you use ? Just so I know what to buy. Thanks

Ulf
Ulf,

The O-Ring size kinda depends on the prop you're using.
I got a big box of 'em at Harbor Freight with a big selection
of sizes for about $8.00.


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