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

YT Mach Racer

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Old 03-24-2009, 01:22 PM
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mk1spitfire
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Default YT Mach Racer

Powered by 50 Westonuk and genisus pipe.

http://www.youtube.com/watch?v=keKug7tNCQA
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Old 03-24-2009, 01:32 PM
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BiggerDanno
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Default RE: YT Mach Racer

Wow!!, that thing is really hauling!

I've got a Mach Racer with a Magnum .46 on it that is much slower than the one in the vid (about 120mph with a 9x8 APC). At those speeds, the elevons are trying to rip apart where the control horn is attached. I can't imagine it lasting long with the West .50 on it.
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Old 03-24-2009, 03:31 PM
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Default RE: YT Mach Racer

Yer that started to happen with me, so I pulled the elevon off and added an extra hinge plus supports for horn. Digi servos too. swinging a 9x7. 10x6 was good too.
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Old 03-24-2009, 07:22 PM
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Default RE: YT Mach Racer

I'm running a TT 46 Pro/ ultra thrust in mine and it moves along smartly.I will have to dopler it some day.
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Old 03-24-2009, 08:56 PM
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Default RE: YT Mach Racer

Wow! I have only flown 1 (Flyboy Dave's) and even with a normal powerplant it sounded like a snare drum!

Impressive video- now put that engine in a Whip, Phenom, or DD.
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Old 03-24-2009, 10:56 PM
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Default RE: YT Mach Racer

Losing that landing gear realy can add some speed too.
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Old 03-25-2009, 03:37 PM
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Default RE: YT Mach Racer

How much lighter is the diamond dust,if any, than the mach racer???
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Old 03-25-2009, 03:54 PM
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Default RE: YT Mach Racer


ORIGINAL: mk1spitfire

How much lighter is the diamond dust,if any, than the mach racer???

Wingspan: ā€¦ā€¦ā€¦ā€¦ā€¦ā€¦.... 34.5 in (876.3mm)

Length: .ā€¦ā€¦ā€¦ā€¦ā€¦ā€¦....... 29.0 in (736.60mm)

Wing Area: ā€¦ā€¦ā€¦.ā€¦ā€¦.... 575 sq in (37.09 sq dm)

Weight: ā€¦ā€¦ā€¦ā€¦ā€¦ā€¦ā€¦..... 2.25 ā€“ 3.0lbs (1020gā€“1360g)

Engine size: ā€¦ā€¦ā€¦ā€¦...... .25 - .40 2 cycle

Radio: ā€¦ā€¦ā€¦ā€¦ā€¦ā€¦........ 4-channel w/3 servos
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Old 03-25-2009, 04:57 PM
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Default RE: YT Mach Racer

ahh cool thanks, I take it thats the clipped wing version?
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Old 03-25-2009, 05:18 PM
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ORIGINAL: mk1spitfire

ahh cool thanks, I take it thats the clipped wing version?
Nope! That's even shorter yet.. :

http://stores.homestead.com/Tetracam...iamond+Dust+RC

"The Diamond Dust CW KIT features lightweight balsa, composite tubes,
and light-ply construction.

This lightly loaded delta wing design makes it ideal for extremely
aggressive maneuvers as well as excellent low speed maneuverability.
The CW version has a more narrow wingspan combined with a more
aggressively swepped leading edge.


Wing Span 29 7/8.in
Wing Area 480 sq in
Wing Loading 12 oz / sq ft
Weight 2.5 -3.0 lbs
Engine Req. .25 - .50 2 cycle
Price $79.95 "

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Old 03-25-2009, 05:31 PM
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Default RE: YT Mach Racer

Ok, so for all out speed the clipped wing is the best? The visability might be harder no?
I need to try one of these.
The mach racer is pretty light. I don't know if the dd has a better laminar aerofoil for greater speed?
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Old 03-25-2009, 05:37 PM
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Default RE: YT Mach Racer

It advises bigger 50 size engine for clipped wing too i notice.
I wonder if bigger dd can take a 50 as it says to 40 and what noticiable difference there is between a normal dd and clipped dd with a 50?
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Old 03-25-2009, 06:29 PM
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Default RE: YT Mach Racer


ORIGINAL: mk1spitfire

Ok, so for all out speed the clipped wing is the best? The visability might be harder no?
I need to try one of these.
The mach racer is pretty light. I don't know if the dd has a better laminar aerofoil for greater speed?
Airfoil? DD? No, those two words don't belong in the same sentence. The name had to come from somewhere! At the speed and weight, during most flight the Cl is so low that a flat plate would likely make little difference. In the turns, well, hard to say who wins there, dunno much about the Mach racer. Have you seen a DD turn? At the low weight, even though you lose a good chunk of speed in the turns, the darn thing just rockets outta there again so no big deal.

Clipped wing, regular wing - if it makes a difference that matters, some would say you shouldn't fly either! You can put a .50 on either.. they'll take any .40-size engine (sometimes jokingly reffered to as a "small block" around here) and several are flying on Jett 60LX's, which are "small block" engines. The next size up (roughly) is a .60/.61 size crankcase or "big block". OS .46/OS .61 are two good reference points as all the clones that made these sizes standard spawned from there. There are exceptions in the non-clone war engine brands of course.

You'll find some flight descriptions around here if you search the DD.

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Old 04-07-2009, 03:12 PM
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Default RE: YT Mach Racer

pic of the beast
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