Cox Yellow Safety Tip Propellers

NEW222 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.

batjac 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.

The Safe Mark

NEW222 Sun May 24, 2015 7:04 pm

Thank you. They do look cool while running. Glad to hear they work well for you.

batjac 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.

The Video Postin' Fiend Mark

rsv1cox Sun May 24, 2015 7:48 pm

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

**RknRusty** 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.
Rusty

dckrsn Sun May 24, 2015 9:47 pm

Yeah, they do look kind of neat.
Here's another shot of one.
Bob
Cox Yellow Safety Tip Propellers Bee_0010

pkrankow 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

batjac 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.

The Needy Mark

getback 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 !!!

batjac 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.

The Likable Mark

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