Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

Carbon props

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Old 02-11-2008, 01:39 PM
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rghalcomb
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Default Carbon props

Hello guys,
I am new at extreme speed. Can somebody tell me where I can find carbon props? In particular it was suggested by Bob Brassell that I needed a 9-10 or a 10-10 carbon prop to go with my OS .91 VR-DF with my pipe at 19,000 rpm.
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Old 02-11-2008, 02:08 PM
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Default RE: Carbon props

Ya at 19000 your right at what the apc's are rated for let me take a look and see if i have any link. (bolly comes to mind but not sure what size they make)

Steven
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Old 02-11-2008, 02:14 PM
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rghalcomb
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Default RE: Carbon props

Steven,
Thanks I can use all the help that I can get.........Ron
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Old 02-11-2008, 02:21 PM
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Default RE: Carbon props

I just checka few sourse and so far no luck so far i ahve looked at:

"J'EN C" (from just engines)
Bolly , nothign in taht size range
BRIAN EATHER'S props (again nothign in that size)
I have looked at super cool props, nothing ion that size range but i ahve herd them of making custom cf props (but it will cost you ALOT)

The super cool props website is http://www.supercoolprops.com/price_list2.php

Umm im not sure those are the links i know il be corious what other guys come up with
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Old 02-11-2008, 02:35 PM
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rghalcomb
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Default RE: Carbon props

Thanks for trying to help Steven.
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Old 02-11-2008, 03:15 PM
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Default RE: Carbon props

this is basically one of the setups you are looking at....
http://www.rcuniverse.com/forum/fb.asp?m=5345805

Id not risk running a standard APC.

Trying to find the link in here. I forget if it was Methanelover or one of our other european friends who had some props to offer....
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Old 02-11-2008, 06:12 PM
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Default RE: Carbon props

Thanks for the info Bob........Ron
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Old 02-11-2008, 07:23 PM
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Default RE: Carbon props

Look up Steve Wilk at Eliminator Props, he has a broad spectrum of sizes and good prices.
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Old 02-11-2008, 08:27 PM
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Default RE: Carbon props

http://www.nclra.org/Supply/SteveWilk/
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Old 02-11-2008, 11:11 PM
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Default RE: Carbon props

Hello FF,
Thanks for the info, however when I try to access that link I don't get anything except "OOPS". I tryed to access nclra.org and get the same thing. Have I done something wrong?
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Old 02-12-2008, 07:48 AM
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Default RE: Carbon props

Wierd, I just cliked on it just now and I went right to it. The sever may have been down,try again.
I did'nt see any prop on his list that can hold that .91 down, perhaps he can make some.

Here's more contact info on him as well as some other guys to give a try:

ELIMINATOR PROPS
Steve Wilk
3257 Welcome Ave. N.
Crystal, MN 55422
Phone: 1-763-531-0604
e-mail: swilk@cpinternet.com

ZZ PROP
PO Box 126
Mehama, OR 97384
Full line of quality Glass & C/F Props for C/LSpeed & Racing.
(Mike Hazel) Phone: (503) 859-2905

PROPS ANONYMOUS
15 Maxwell Road
Marmarua, R-D1, Pokeno
New Zealand
High quality FAI Speed Props and Custom Machined Speed Pans. (Bill Bell)



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Old 02-12-2008, 09:41 AM
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Default RE: Carbon props

he does have an 8.25 x 10
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Old 02-12-2008, 03:16 PM
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Default RE: Carbon props

Hello FF,
Thanks again for the information. I put in a call to Mike in Orgon and left him a message and an email to Steve Wilks. I hope to receive some good news from those fellows. I havn't done anything with the New Zealand guy as of yet.
Here is one that I designed, built and after a fair dive was radared at 172mph. A guy by the name of Bill Cunningham flew it for me form the Tulsa Glue Dobbers. It was checked on a oneway pass and not both ways. But it was my first shot using an OS.61 pumped ABC with a tuned pipe. I posted it earllier on another thread.......Ron
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Old 02-12-2008, 08:21 PM
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ORIGINAL: cncswiss1

he does have an 8.25 x 10
I saw that, but it wont load the .91 down, it'll over rev.
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Old 02-14-2008, 10:11 PM
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Default RE: Carbon props

Hello again FF
I received a call from Mike Hazel on carbon fibre props from Or. He did not have a 10-10 and said that he will be starting up around april on CF props. He gave me an estimate for building a new mold for the 10-10 of $125.00. I'm not sure how much the prop will cost.
So thanks to you I have a lead on obtaining a CF prop. I havn't heard from Steven Wilks as of yet. I am most appreative for your looking up these guys for me......Ron
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Old 02-15-2008, 05:58 AM
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Default RE: Carbon props

frankly, i think anything that is designed to use a .91 VR-DF should be built immediately and lot's of photos and a video or 2 should be posted here.

david[X(][X(]
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Old 04-06-2008, 10:34 PM
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Default RE: Carbon props

With the talk of Carbon props in Look's Strega thread, I decided to bring this one back...
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Old 04-10-2008, 08:54 PM
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Default RE: Carbon props

good idea.

david
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Old 04-11-2008, 08:52 PM
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Default RE: Carbon props

I just got my mailer from Mike hazel of zz speed props..

found some stuff good for us:

9x10.5 CL D speed carbon $16
8.2x10.5 CL D speed carbon $16
8.2x11 CL D speed carbon $16
8.625x9.25 CL D speed carbon $16
8.5x11 CL D speed carbon $16
and for 90 fan engine owners 9x12 3/8 bore carbon $15


zzclspeed@aol dot com
I have his phone number but figure it may not be cool to post for the shole worls, just pm me if anybody wants it
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Old 04-11-2008, 09:53 PM
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rghalcomb
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Default RE: Carbon props

Hello cncswiss1
Yeah I got my mailer from ZZ also. Ya recond the 9.5 x 10 would work on the OS.91 VR DF at 19,000 rpm?

Ron Halcomb
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Old 04-11-2008, 10:29 PM
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Default RE: Carbon props

Looks like I'll take a few 9X12's for the K&B 1.00 pictured in the foreground. It should be about perfect around 21000 rpm. Now I can make plans [>:]
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Old 04-12-2008, 02:38 PM
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Default RE: Carbon props

Some posts were lost when RCU had to reset so let me recant to some now gone posts.
I think the 9X 10.5 is better suited for 77 to 80 DF engines and it may be too light a prop for the OS 91 DF or BVM 91 DF. Those two engines have about the same hp as the K&B 1.00 DF engine. I think the best prop for all three engines is the 9X12.

By the way did you know that the pitch speed at 21K is 238 mph! YEEEHHAAAAAHHHH!!
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Old 04-12-2008, 04:00 PM
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Default RE: Carbon props

ORIGINAL: freakingfast

By the way did you know that the pitch speed at 21K is 238 mph! YEEEHHAAAAAHHHH!!
Hi guys,

please keep in mind, that you need the appropriate airframe to make use of these high prop pitches (or theoretical slipstream)!

It is obvious, that a certain amount of engine torque is needed to keep the engine within its powerband when pulling such an oversquared prop. So a speed venturi carb or an open-locked bigbore R/C carb is essential when using this kind of props...

Over here in Germany many mistakes have been done in the past 30 years due to over-propping (= potential overheating) combined with too much airframe induced drag.

Main problem is, that we are not dealing with a pure horizontal track like pylon racing, Cl-speed flight or tether cars, but an alternation of steep dives, 300 meters long horizontal straight line flight (= speed trap) and finally the most problematic steep climbs. Unloading as well as deceleration of the engine rpm is much more evident here than in pylon-racing.

Compared to a F3D pylon-racing setup it is relatively difficult for us to find the right mixture between

- static thrust for safe take-off (prop stall)
- prop pitch versus tuned pipe length (port timing respectively)
- prop pitch induced slip-stream vs airframe design vs actual speed
- prop diameter (avoid prop tip speeds exceeding 0.75 mach) vs airframe drag

So a speed engine that does provide a comparable wide plateau of maximum torque is always beneficial for a heavily oversquared prop.

However you’ll notice, it’ll be hard to find best compromise between torque and top rpm (unloaded).




P.S. If you want to avoid hassle, go electric. This will give you the torque and rpm you need in every situation…
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Old 04-12-2008, 04:12 PM
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Default RE: Carbon props

Hello FF.
I'm gonna buy a couple of those 9 x 12's from ZZ. Probably should have more but for right now 2 will do. Since I'm knew at this what's the equation that you use to arrive at the mph?? By the way I just purchased a BSE FIRE .90LX from Dub Jett along with a tuned pipe. I'm gonna have fun one way or another....Ron
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Old 04-12-2008, 04:16 PM
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Default RE: Carbon props

Hello FF.
I'm gonna buy a couple of those 9 x 12's from ZZ. Probably should have more but for right now 2 will do. Since I'm knew at this what's the equation that you use to arrive at the mph?? By the way I just purchased a BSE FIRE .90LX from Dub Jett along with a tuned pipe. I'm gonna have fun one way or another....Ron
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