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Cox Engine of The Month
August-2024
balogh's
"Cox TD09 R/C Beast of Burden featuring Kamtechnik head and DIY metallic fuel nipple"
PAST WINNERS
balogh's
"Cox TD09 R/C Beast of Burden featuring Kamtechnik head and DIY metallic fuel nipple"
PAST WINNERS
1/4A-1/2A propellor mounting food for thought.
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1/4A-1/2A propellor mounting food for thought.
Found this in a search today.
Curious to know more about how this works. Perhaps there's a magnetic (Samarium-Cobalt type) link involved? If the motors' output-shafts' drive-plate incorporated a square or hex "boss" containing the magnet(s) and the prop's "hub" had a "mating" square or hex FE/iron insert (washer).. might it work?
With such a set-up; a pre-balanced propeller could be fitted to the motor.. by merely pressing it onto the motors' drive-plate.. with a "click" affirmation that its' locked-on?
Curious to know more about how this works. Perhaps there's a magnetic (Samarium-Cobalt type) link involved? If the motors' output-shafts' drive-plate incorporated a square or hex "boss" containing the magnet(s) and the prop's "hub" had a "mating" square or hex FE/iron insert (washer).. might it work?
With such a set-up; a pre-balanced propeller could be fitted to the motor.. by merely pressing it onto the motors' drive-plate.. with a "click" affirmation that its' locked-on?
Re: 1/4A-1/2A propellor mounting food for thought.
Did a little head scratching and all I could come up with
is, it's an electric motor application. Not to say it wouldn't
work on a fuel engine, RPM wise.
How you liking the holiday weekend weather, Roddie?
Watching the Yanks play in Detroit, and it looks beautiful there.
Bob
is, it's an electric motor application. Not to say it wouldn't
work on a fuel engine, RPM wise.
How you liking the holiday weekend weather, Roddie?
Watching the Yanks play in Detroit, and it looks beautiful there.
Bob
dckrsn- Diamond Member
- Posts : 2750
Join date : 2010-10-21
Age : 71
Location : Long Island, New York
Re: 1/4A-1/2A propellor mounting food for thought.
dckrsn wrote:Did a little head scratching and all I could come up with
is, it's an electric motor application. Not to say it wouldn't
work on a fuel engine, RPM wise.
How you liking the holiday weekend weather, Roddie?
Watching the Yanks play in Detroit, and it looks beautiful there.
Bob
The weather sucks Bob...
Re: 1/4A-1/2A propellor mounting food for thought.
Very interesting roddie. Do you know where you saw that online or what the particular model that was available on? That info may help in a search to find a possible thread on it or review that may show better how it works?
NEW222- Top Poster
- Posts : 3896
Join date : 2011-08-13
Age : 45
Location : oakbank, mb
Re: 1/4A-1/2A propellor mounting food for thought.
Curious here too. Think I would have used "Break away" rather the "Loose".
Enlarged the picture, looks like foam and electric if the real thing and not a print. Fuel or electric, I would not want to be in the way without safety glasses if it ever cut "loose."
Enlarged the picture, looks like foam and electric if the real thing and not a print. Fuel or electric, I would not want to be in the way without safety glasses if it ever cut "loose."
rsv1cox- Top Poster
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Posts : 10958
Join date : 2014-08-18
Location : West Virginia
Re: 1/4A-1/2A propellor mounting food for thought.
Looks like plastic parts that snap together. The models there are used on are quite small.
https://www.exhobby.com/products/propeller-and-propeller-saver-shaft-adaptor-for-rc-airplane-761-5?variant=38102168174782
https://www.exhobby.com/products/propeller-and-propeller-saver-shaft-adaptor-for-rc-airplane-761-5?variant=38102168174782
gkamysz- Gold Member
- Posts : 397
Join date : 2018-02-22
Location : Chicagoland
Re: 1/4A-1/2A propellor mounting food for thought.
If it wasn't so much there is an Eachines P-51 for sale locally with that design.
NEW222- Top Poster
- Posts : 3896
Join date : 2011-08-13
Age : 45
Location : oakbank, mb
Re: 1/4A-1/2A propellor mounting food for thought.
NEW222 wrote:Very interesting roddie. Do you know where you saw that online or what the particular model that was available on? That info may help in a search to find a possible thread on it or review that may show better how it works?
Hi Chancy, I was searching the web for F4U Corsair engine cowlings. You may remember; some 6 years ago, my brother gave me a TopFlite (kit RC-21 circa 1978) that he found at a flea market. It had been opened.. but looked complete except for a missing cowling.
CEF thread-link here
My recent search came up with an electric park-flyer having that break-away propeller system. I can't remember the model manufacturer. I was more interested in the break-away concept.
Neodymium/rare-earth/Samarium-Cobalt magnets have an incredibly strong field. I once harvested a pair from a PC's hard-drive.. and made the mistake of putting one in my jacket pocket.. which already had one in it. The two "snapped" together wile I was holding one.. and it pinched some skin on my finger.. drawing blood.
Re: 1/4A-1/2A propellor mounting food for thought.
Here you go roddie. See the video starting at 2:50. Shows the propeller and him seperating it from the motor.
NEW222- Top Poster
- Posts : 3896
Join date : 2011-08-13
Age : 45
Location : oakbank, mb
Re: 1/4A-1/2A propellor mounting food for thought.
Hey Chancey! Thanks for finding the model that uses the break-away prop. system. We still don't know how it works though. The magnetic link was my thought.. but it doesn't look like that's what's implied here. Maybe my idea is too far-fetched..
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