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

MVVS .49

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Old 01-06-2008, 07:17 PM
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Zman39
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Default MVVS .49

Hey all,

As I posted in a different thread for a different reason I am putting together a scratch built speed plane. The plane was rtf with a sport jett .50 and had a rtf weight of 2.9 pounds. It had promise until second lap, the connecting rod of motor snapped. This engine was at least 2 years old and I got it second hand so no telling how it was treated. Dub makes great engines so I am sure it was previous owner user induced. ANyway .........this plane is untested really as far as if it will be a screamer and not sure if I want to rebuild or buy new racing motor until I know.. I have a mvvs .49 with pipe laying around but always used it for profile 3d flying and never tried to prop it for speed. Anyone know if this engine like high rpms? I know it isnt a jett but was hoping I could use as a test bed to see what plane may be capable of before dumping racing motor money in it.

Any ideas?

Thanks

Mike
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Old 01-06-2008, 07:41 PM
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glowplugboy
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Default RE: MVVS .49

With the tuned mini pipe, the MVVS .49 is a very high rpm, high output engine. Mine would turn a 10 X 6 in the mid 17's on 10% nitro fuel. It was in a Sig Kougar, and it was very fast, with most who saw it fly estimate it was flying around 100 mph in straight and leve flight. The .49 would be a excellent choice for a speed model. Don't go above 15% on the nitro, it doesn't need anymore than that.

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GPB
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Old 01-09-2008, 11:57 AM
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perttime
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Default RE: MVVS .49

ORIGINAL: glowplugboy

Don't go above 15% on the nitro, it doesn't need anymore than that.
I believe most MVVS engines are designed to run on 0 to 5% nitro.
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Old 01-10-2008, 08:28 AM
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MJD
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Default RE: MVVS .49


ORIGINAL: perttime

ORIGINAL: glowplugboy

Don't go above 15% on the nitro, it doesn't need anymore than that.
I believe most MVVS engines are designed to run on 0 to 5% nitro.
I wouldn't even go that high, mine was protesting with 15%. Temp, humidity, prop, plug of course all play a part, but it is happier on lower nitro than 15% in my experience.
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