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

My weekend D-Dust project...

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Old 02-14-2005, 11:22 PM
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smchale
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Default My weekend D-Dust project...

Well, after wearing out my old K&B 6.5 (RIRE) I found a new one on eBay for my diamond dust. Figuring that I had a new engine my dust deserved a bit of a make-over, but when i stripped the covering off, i found that a number of years of flying, a few repairs, and countless poor-launches, it really needed to be retired. Well, I spent about 4-5 hours saturday framing up a new one and a couple hours sunday covering it to where it sits now. I need to pick up some hardware to hook up the control surfaces, adjust the pipe length and mount the back support, but other than that it's pretty much ready to begin it's career! [8D]

(It's built basically stock...however, i like the look of a cowl ring and a bit of shaped balsa behind a spinner so i've made a modification to blend the spinner in a bit at the front). The covering is ultracote 'kevlar weave' on the top and solid bright yellow on the bottom. Here's a few pics:
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Old 02-14-2005, 11:27 PM
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cobratraxxas69
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Default RE: My weekend D-Dust project...

Looks good!!!

How did you mount your fuel tank...is it mounted with only the covering, or does it have straps holding it in there too? Did you use foam around the tank to reduce fuel foaming?
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Old 02-15-2005, 07:47 AM
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Default RE: My weekend D-Dust project...

Thanks! Yes, it's surrounded in soft foam, then I used a piece of covering over the top to seal it in....per a tip from RCU. The first dust just had it in a fully enclosed balsa box with foam around and I never had an issue with fuel foaming.
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Old 02-15-2005, 11:48 PM
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Default RE: My weekend D-Dust project...

I like the kevlar style covering....[sm=thumbup.gif]

....good luck with the plane....

FBD.
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Old 02-15-2005, 11:54 PM
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Default RE: My weekend D-Dust project...

elevons only ?[X(] this thing must be hard as hell to fly , let us know , video tape if you can
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Old 02-16-2005, 08:18 AM
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Default RE: My weekend D-Dust project...

Thanks Dave, I thought the covering was kinda unique too....plus it's Ultracote instead of monokote so it's a little more durable.

RC-Fiend, you'd actually be surprised, the dust is pretty fun to fly...just point and shoot! And it glides very well being that it is so light. A few guys have posted video in this forum on launching and flying this model.
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Old 02-16-2005, 12:11 PM
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Default RE: My weekend D-Dust project...

ORIGINAL: RC-FIEND

elevons only ?[X(] this thing must be hard as hell to fly , let us know , video tape if you can
Just the opposite really... it flies like a charm.
And anyway, what more than elevons would you use on a plane like this?
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Old 02-16-2005, 12:53 PM
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Default RE: My weekend D-Dust project...

i like the color scheme and have thought about that kevlar covering for my ultrasport. How's the visibility in the air?
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Old 02-16-2005, 01:17 PM
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Default RE: My weekend D-Dust project...

ORIGINAL: Rudeboy

And anyway, what more than elevons would you use on a plane like this?
Maybe a drag chute?


jzinckgra, the 'simulated' kevlar covering is just like any other ultracote, but looks cooler. [8D] From about 10-15 feet away it just looks like a solid dark color....the bottom of the dust is done in solid bright yellow yellow to contrast the top from the bottom.
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Old 02-16-2005, 03:17 PM
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Default RE: My weekend D-Dust project...

where can i find a diamond duster kit for sale? any help?
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Old 02-16-2005, 04:03 PM
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Default RE: My weekend D-Dust project...

http://www.diamonddustrc.com/
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Old 02-18-2005, 05:43 PM
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Default RE: My weekend D-Dust project...

Hey Sean, cool lookin' Dust! Which pipe is that? I have the "Mini pipe" that came with mine, which one works better?

Anyone else with experience with this engine, is the mini pipe a useable pipe, or would I be better off with a tuned expansion chamber?

I've been thinking of using a Perry pump carb. and VP-30 pump so I can maybe throttle it a little...opinions?
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Old 02-19-2005, 01:47 AM
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Default RE: My weekend D-Dust project...

I'm learning more and more about this engine as we speak. It was sold as a F1 pylon engine and tuned for an open header and high nitro. If your model has a hole cross drilled below the exhaust port, it needs to be plugged if you want the pipe to be anything more than a decoration. It seems that this model engine is fairly plentiful and many of the original owners who were into F1 20 years ago are ready to clear their useless inventory and make this sucker a good buy for the hi speed sport flyer of today. I like your DD! it looks,"business like[8D]"! What prop and rpm are you getting out of the 6.5?
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Old 02-19-2005, 02:35 AM
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Default RE: My weekend D-Dust project...

Wow- That is SWEET looking! How about an aluminum spinner, a real pointy one-

Seriously, it looks great! Keep us posted
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Old 02-19-2005, 02:52 PM
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Default RE: My weekend D-Dust project...

Yeah, the instructions say 65-70% Nitro...and prop it for "at least 20,000 r.p.m. while still in a fast 4 cycle" for the break-in...

Mine says "Series 75" on the box, and it has a 0004269 serial # so it might be an early one? I think mine does have a small hole in the sleeve just below the exh. port. (don't remember ) I'll have to check...

I know the guys who pylon raced 'em used the mini pipe. (right?) It's just a piece of seamless alum. tubing about 4" long, and even still has the manuf. red stencil letters on it...
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Old 02-19-2005, 03:28 PM
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Default RE: My weekend D-Dust project...

Yep, the exhaust extension was all that the rules allowed. I have asked around the C/L SPEED community and found some tips to convert this engine into a true speed engine.
1. lighten piston
2. streamline rod
3. raise middle third of exhaust port to net 188-194 degrees of duration
4. open up crank port to 18/72 [maybe for us 68 degrees closing]
5. open up crank I.D., flare to counter weight. idea is to slow intake charge so it doesn't bounce back out of intake port.
6. venturi .010" smaller than largest crank I.D.
7. CYCLON pipe
8. plug SPI port
9. buy as many spare parts as you can get your hands on.

I'm going to attempt to make a NELSON head and go with a seperate head button/ clamp style setup, this way it is easy to make different buttons with different chamber designs. I look at this engine like some guys at the track look at a 396, cheap power and fun. My speed plane thread is going to turn into an engine thread pretty soon.
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Old 06-08-2005, 10:54 PM
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Default RE: My weekend D-Dust project...

well gang, just wanted to report that i have a couple flights on the dust shown above this evening and it's just like the past dusts...flew great! funny thing is that it seemed to run better with no pressure coming from the pipe. glides great! while i have no true way of measuring, i'd guess the dust with the K&B RIRE 6.5 was hitting about 140-150mph. again this is just a guesstimate...
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Old 06-13-2005, 04:00 PM
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Default RE: My weekend D-Dust project...

Sweet Dust!

I'm so happy to read that folks out there till get excited about flying a dust,, it seems to me like the perfect plane
to fly between flights of "regular" planes.. it kinda uses a different part of your brain, and the adrenaline rush! whew!
i love my dust and think everyone should have on in the hanger!

diamond dust rc has hats that say "Dust thy neighbor!"
pretty funny!
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Old 06-13-2005, 04:37 PM
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Default RE: My weekend D-Dust project...


ORIGINAL: twig666

Sweet Dust !!.... Diamond dust r/c has hats that say "Dust thy neighbor!"

pretty funny!
....I love it !!!

FBD. [8D]
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