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Author Topic: Anybody recognize this P30 Propeller Mechanism Graphic?  (Read 1892 times)
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DerekMc
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« on: December 10, 2014, 06:49:57 PM »

I found this page in my files. I don't remember where I found it originally. Anybody recognize it?

http://i1139.photobucket.com/albums/n542/derekmc777/SKMBT_22314121015370_zpsc201630e.jpg
Anybody recognize this P30 Propeller Mechanism Graphic?
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Derek
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« Reply #1 on: December 10, 2014, 06:54:22 PM »

D-Mac, that is on page 41 of the FFQ P30 Survey 2010.  Originally from Vol Libre #32, 1999.
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DerekMc
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« Reply #2 on: December 10, 2014, 06:59:12 PM »

Sweet. Thanks Bill! I wonder how I ended up with a single sheet copy of it Huh
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Derek
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« Reply #3 on: December 10, 2014, 07:12:11 PM »

Those with a clutch bound to the prop are legal in UK and likely Europe - but not in N.America .. unless something changed in recent times
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TimWescott
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« Reply #4 on: December 10, 2014, 07:32:20 PM »

Those with a clutch bound to the prop are legal in UK and likely Europe - but not in N.America .. unless something changed in recent times

What about Alt 5 and Alt 6, with the clutch mechanisms that don't use the dog molded into the prop, but don't have anything attached to the prop?
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calgoddard
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« Reply #5 on: December 10, 2014, 08:28:52 PM »

From the P-30 rules:


1.4. The propeller shall be a commercially available plastic freewheeling propeller between 23 and 25 centimeters (9.05 and 9.84 inches) in diameter.

Only the following changes will be allowed:

1.4.1. Flashing may be removed.

1.4.2. Balancing by the addition of weight to one blade will be allowed.

1.4.3. Enlarging the hole of the propeller hub will be allowed in order to accept a larger diameter shaft and/or a bushing cut from metal tubing.


Looks like Alt5 would be legal.

The Alt6 diagram does not provide enough detail to determine exactly what modifications were made to the prop. It would be OK if the modifications were enlargement of the hole in the propeller hub and insertion of a metal tube bushing, as it appears from the diagram.
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duration
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« Reply #6 on: December 10, 2014, 08:55:56 PM »

Alt 5 works great. Use the smallest size K&S rectangular brass tubing and solder to shaft (3/32 x 3/16 I think).  Don't bend the winding loop on the front, instead use a small piece of heat-shrink tubing to retain prop. One of the other pluses of this system is that props can easily be swapped out.

Louis
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jswain
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« Reply #7 on: December 10, 2014, 10:42:38 PM »

more info on #5

Shorty's Basement has these mechanisms available, very convenient imho Wink

---- http://volareproducts.com/BUY/index.php?main_page=product_info&cPath=56_40&products_id=280 ----

js

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Dave Andreski
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« Reply #8 on: December 12, 2014, 04:20:09 PM »

I found this page in my files. I don't remember where I found it originally. Anybody recognize it?

http://i1139.photobucket.com/albums/n542/derekmc777/SKMBT_22314121015370_zpsc201630e.jpg

Derek,
I have the same graphic and I'm quite certain that I 'saved' it after someone posted it on the old, now defunct, 'FreeFlightOnline' website many years ago.
This was on March, 14, 2001.
Dave
Anybody recognize this P30 Propeller Mechanism Graphic?
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« Reply #9 on: December 12, 2014, 05:33:05 PM »

I'm fairly certain it was published originally in the French FF magazine Vol Libre, then re-printed in the Free Flight Quarterly P-30 Book, which is still available from FFQ--the P-30 Book is two volumes and comes with two full-size plans---a real margin and a must-have for anyone interested in P-30.  They also have a similar Coupe Book… I think the price is $25 each.

Louis
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Dave Andreski
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« Reply #10 on: December 12, 2014, 05:48:58 PM »

Yes,
I agree that it was first published in 'Vol Libre'.
It seems that not many of us remember 'FreeFlightOnline', one of the first FF Forums on the 'web'.
I think it was run by a couple of guys from Florida.
Jim Moseley, among many others, was a frequent contributor.

I miss that site. There were a lot of great 'stories', hints and tips, and Many,Many great pics.
Dave
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cd_webb
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« Reply #11 on: October 04, 2015, 08:00:04 AM »

Here's my version of "Alternate 5", and I've read through the rules posted above concerning allowable prop mods. But since not one of the front end options show a tension spring behind the prop, and I have no P30 contest experience, I'd like to know that this set up is acceptable.
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applehoney
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« Reply #12 on: October 04, 2015, 10:06:50 AM »

Looks good to me.  I use spring tensioners on all rubber models, P30's included
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« Reply #13 on: October 04, 2015, 01:47:14 PM »

I believe the drawing first appeared in the French magazine Vol Libre sometime back in the 1990s.

Alt. 5 is my favorite---very easy to make using K&S rectangular brass tubing.  I think there is another post somewhere with additional info on the Vol Libre drawing and Alt.5.

Louis
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cd_webb
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« Reply #14 on: October 04, 2015, 09:17:09 PM »

Looks good to me.  I use spring tensioners on all rubber models, P30's included

Thank you. That's what I wanted to hear.
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Ross J
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« Reply #15 on: December 22, 2015, 10:51:39 PM »

I make a version of Alt. 5 using a wheel collar. I file a notch in the collar then drill an .025" off to the side and perpendicular to the main hole in the collar. That new hole is for the music wire clutch. I file a small flat spot on the shaft for the set screw. To hold the prop on, I either thread the shaft and use a small nut, or use a spring type wheel retainer. Changing props takes a few seconds.

The advantage is that bent prop shafts can be changed easily. I don't solder well so this design doesn't require a solder joint nor do you have to solder with the shaft in the bushing.
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