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

New Megatech Mach Racer delta wing

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Old 02-17-2006, 01:54 PM
  #1  
Dealspeed
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Default New Megatech Mach Racer delta wing

Any good?? I bought one, figured for 89 buks it was worth it.
Planning on running a OS 46AX with a tuned Pipe, what prop should I run?? LHS told a 9x6 APC. would a 9x8 be better ??
and what kind of speeds should I be looking at with this setup ??
Thanks for all your input [8D]
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Old 02-17-2006, 10:24 PM
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dancanfly3d
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Default RE: New Megatech Mach Racer delta wing

Ive just got me one to,Instead of putting the twin vertical stabs on it i made 1 single vert stab with a rudder on it Im using a os 50 with 9x8 apc prop and stock muffler ..cant wait till i get my tuned pipe from tower hobbies next week oyeah i also tossed the landing gear back in the box there a drag want to see a picture look in the photo gallery under delta wings
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Old 03-04-2006, 09:43 AM
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Default RE: New Megatech Mach Racer delta wing

I just got mine yesterday....It looks fast. I have a OS .45 FSR in mine, it's the
only engine I had that would fit.

FBD.
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Old 03-04-2006, 12:40 PM
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Default RE: New Megatech Mach Racer delta wing

FBD, I like that! You iron your t-shirts and your airplanes at the same time!
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Old 03-04-2006, 02:17 PM
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Default RE: New Megatech Mach Racer delta wing

....Kmot....it saves time that way....[sm=thumbup.gif]

My wife said either her, or the airplanes has to go !!!

Look at my hobby room. Man, I hate doing laundry. [sm=bananahead.gif]

FBD.
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Old 03-04-2006, 08:38 PM
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Default RE: New Megatech Mach Racer delta wing


ORIGINAL: Flyboy Dave

....Kmot....it saves time that way....[sm=thumbup.gif]

My wife said either her, or the airplanes has to go !!!

Look at my hobby room. Man, I hate doing laundry. [sm=bananahead.gif]

FBD.

And your reply was "don't let the door hit you on your way out" ???

my wife left a few years ago.... and this is how my livingroom looks now!
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Old 03-04-2006, 10:16 PM
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Default RE: New Megatech Mach Racer delta wing

Man, you sure are Crazy for Flight!!! I'd sure wouldn't mind having that collection of jets and delta-wings.
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Old 03-04-2006, 11:01 PM
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Default RE: New Megatech Mach Racer delta wing

C4F: Nice collection!

FBD: how typical! The trash can is empty, but the rest of the place is trashed!
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Old 03-04-2006, 11:10 PM
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Default RE: New Megatech Mach Racer delta wing


ORIGINAL: Kmot

FBD: how typical! The trash can is empty, but the rest of the place is trashed!
Yeah, but....I know where everything is !!!! (after I find it )

FBD.
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Old 03-05-2006, 05:31 AM
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Strykaas
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Default RE: New Megatech Mach Racer delta wing

Hey Flyboy, what is this strange "hollow" muffler ? Never seen that kind before [sm=confused.gif]
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Old 03-05-2006, 11:43 AM
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Default RE: New Megatech Mach Racer delta wing

That's a vintage Semco venturi muffler, I beleive.
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Old 03-05-2006, 12:40 PM
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Default RE: New Megatech Mach Racer delta wing

I noticed that the flying weight of the Mach Racer is 3.56 lbs. Take the gear off and you would lose a bit of that. At that point, it's weight should compare favorably to the Diamond Dust. (My clipped wing Dust weighs 3.68 lbs). Plus it appears to be as sleek as the DD.

With the landing gear removed, what will the speed of the Mach Racer be versus the Diamond Dust (given the same engine in each, for instance the OS .46 AX mentioned earlier)....


In other words, what would you guess would be the MPH of each plane with the OS .46 AX?
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Old 03-05-2006, 01:49 PM
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Default RE: New Megatech Mach Racer delta wing

ORIGINAL: Kmot

That's a vintage Semco venturi muffler, I beleive.

At least, it seems to reduce muffler overall drag. How does it work btw ?
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Old 03-05-2006, 10:32 PM
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Default RE: New Megatech Mach Racer delta wing

Well, for 'muffling sound', not very well.

It has a dual lining. The inner shape is a venturi, which when the aircraft is moving creates a low pressure, The outer lining, or body, is where the exhaust gases go. In theory anyway, the low pressure of the inner venturi would create a scavenging effect on the exaust gases, giving a boost in flow.
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Old 03-06-2006, 07:54 AM
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Default RE: New Megatech Mach Racer delta wing

Kmot has the right idea....the inner tube runs straight through, the exhaust
goes into the outer portion and out the back. They are louder than a stock
muffler, and do give better power, no doubt about that. The are cool looking.

I have about 5 of them, The one on this 45 FSR is cast. The others seem to
be spun and welded, the massaged and polished. I've heard then called Demco.
Tatone. and Macs....I got them all second hand....I don't really know where
they come from. This one is on a 60 Rossi, and a couple on OS 60 FSR's.

FBD.
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Old 03-06-2006, 11:18 AM
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Default RE: New Megatech Mach Racer delta wing

FBD: If you ever want to part with them, I will give them a happy home.

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Old 03-06-2006, 11:36 AM
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Default RE: New Megatech Mach Racer delta wing

You bench is too well organized, it should look more like this....
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Old 03-06-2006, 11:44 AM
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Default RE: New Megatech Mach Racer delta wing

Oh I see. You mean it should look like this?
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Old 03-06-2006, 12:52 PM
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Default RE: New Megatech Mach Racer delta wing

With the landing gear removed, what will the speed of the Mach Racer be versus the Diamond Dust (given the same engine in each, for instance the OS .46 AX mentioned earlier)....


What about the speeds of both with the Jett .50?
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Old 03-06-2006, 01:34 PM
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Default RE: New Megatech Mach Racer delta wing


ORIGINAL: cobratraxxas69

With the landing gear removed, what will the speed of the Mach Racer be versus the Diamond Dust (given the same engine in each, for instance the OS .46 AX mentioned earlier)....


What about the speeds of both with the Jett .50?
Your clipped wing Dust weighed over 3.5 lbs? My regular Dust with a Jett 50 only weighed 2 lbs 12 ozs. (no fuel). I am wondering the thickness of the Mach Racer wing. The Dust is about 5%. It also appears the mach Racer has more frontal area behind the engine. My guess is that the Dust will be faster. My first Dust started with a 46 FX and UT muffler. Speeds probably in the 125/130 range turning a 9x7 at 16,500 rpm. 150+ speeds with the Jett 50.
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Old 03-06-2006, 10:06 PM
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Default RE: New Megatech Mach Racer delta wing

I eyeballed the Mach racer at 1" thick....not bad, I think it will scoot.
I ran up the OS 45 for the first time, and it's a good one.

FBD.
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Old 03-06-2006, 11:59 PM
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Default RE: New Megatech Mach Racer delta wing

Your clipped wing Dust weighed over 3.5 lbs? My regular Dust with a Jett 50 only weighed 2 lbs 12 ozs. (no fuel).
I think my Dust is big-boned
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Old 03-07-2006, 03:30 PM
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Default RE: New Megatech Mach Racer delta wing

I ran up the OS 45 for the first time, and it's a good one.
Lucky guy !! Is it tight ??
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Old 03-07-2006, 03:57 PM
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Default RE: New Megatech Mach Racer delta wing

Whoa- Cool looking bird--- I been gone too long! $89 bucks?

Dave with the FSR, imagine with an APC!
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Old 03-07-2006, 08:53 PM
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Default RE: New Megatech Mach Racer delta wing

Strykaas....it's a ringed engine, so it's not tight. However, it is crisp
and has excellant compression....no bearing noise. I put a new plug
in it, and primed the carb....it fired right up.

Razor....where ya' been ? I still have the bag of APC's for you.

FBD.
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