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Cox Yellow Safety Tip Propellers

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Cox Yellow Safety Tip Propellers

Post  NEW222 on Sun May 24, 2015 5:35 pm

Hi again. Just wondering if anyone here has used the Cox yellow safety tip propellers, and how they were. I had busted up all but 1 propeller and was thinking of trying one of these out. Plane will be trainer type control line, for fun, no competition or speed. Thank you.
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Re: Cox Yellow Safety Tip Propellers

Post  batjac on Sun May 24, 2015 6:53 pm

I love these props.  They are my "Go-To" prop.  They may not be the most efficient prop you can use, but I sure as hell can see the prop arc when they're turning.  No chance of (well, less chance of) sticking my finger in the prop while it's spinning.  I have a bunch, and I may just order another couple-three more on my next order with Bernie so that I never run out.

Here is one running on a Testors .049.  I have three or four vids of them running on a Cox .049. but this vid is the quickest one for me to grab.  You can see how visible the prop arc is on these puppies.





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Re: Cox Yellow Safety Tip Propellers

Post  NEW222 on Sun May 24, 2015 7:04 pm

Thank you. They do look cool while running. Glad to hear they work well for you.
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Re: Cox Yellow Safety Tip Propellers

Post  batjac on Sun May 24, 2015 7:13 pm

And a couple more videos of the yellow props.  The first is tuning the two Bee engines before the maiden flight of my BTC-4, and the second is the actual video of the maiden.  Notice that the last half minute of the maiden flight is on only one engine, and it's the outboard engine.










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Re: Cox Yellow Safety Tip Propellers

Post  rsv1cox on Sun May 24, 2015 7:48 pm

Nifty, centrifugal force, tip weight, or offset kept it on the lines? Maybe all three?
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Re: Cox Yellow Safety Tip Propellers

Post  RknRusty on Sun May 24, 2015 9:30 pm

Tee off of a central bladder and they'll always cut off together. That really is pretty cool, I remember watching the day you first posted the link. Yeah, those props are fine. I think I have a few.
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Re: Cox Yellow Safety Tip Propellers

Post  dckrsn on Sun May 24, 2015 9:47 pm

Yeah, they do look kind of neat.
Here's another shot of one.
Bob
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Re: Cox Yellow Safety Tip Propellers

Post  pkrankow on Sun May 24, 2015 10:52 pm

Sadly they flex enough that power is sapped.

I run them regularly on my bashers that other people may fly.

Phil
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Re: Cox Yellow Safety Tip Propellers

Post  batjac on Sun May 24, 2015 11:20 pm

rsv1cox wrote:Nifty, centrifugal force, tip weight, or offset kept it on the lines?  Maybe all three?  

I'm calling it offset. I didn't put any tip weight on the outboard wing, as I figured the mass of the nacelle and engine so far out from the bellcrank would be fine. On the inboard wing I put no engine offset, and on the outboard wing I put about double the normal offset I'd put in a single engine plane.

I need to fly that plane some more.

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Re: Cox Yellow Safety Tip Propellers

Post  getback on Mon May 25, 2015 7:05 am

Are those Nitro Mators in the back ground in that engine test lol! Yes I liked the way that plane flew from the maiden flight , she was quick off the line Cool o yeah the safety Porps. good stuff !!!


Last edited by getback on Mon May 25, 2015 7:07 am; edited 1 time in total (Reason for editing : add on per hijack)
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Re: Cox Yellow Safety Tip Propellers

Post  batjac on Mon May 25, 2015 9:18 am

dckrsn wrote:Yeah, they do look kind of neat.
Here's another shot of one.
Bob

One thing I especially like is how, with that thick, rounded tip, it makes a darker yellow line at the edge of the prop disc. Nice sharp delineation.

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