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Some .60s

Old 11-27-2009, 01:49 PM
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Hobbsy
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Default Some .60s

I told some a few days ago that I'd run some of my .60s, I got two of them run today
Prop===Graupner 14x7
Fuel====Davis ABC mix
PAW .60 rpm=======6,925
MVVS .61 Davis head==7,700 wearing MVVS 3255 Quiet Muffler.
Old 11-27-2009, 02:48 PM
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pe reivers
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Default RE: Some .60s

It seems the 3255A muffler is very restrictive. The MVVS .60 turns 9600 rpm on that same prop on glow, and a 1/4 length T-pipe. now OOP.
Do you have data on the engine before you converted it?
Old 11-27-2009, 06:16 PM
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Default RE: Some .60s

Pe', it does turn an APC 14x7 at 9,500, the Graupner seems to be a much harder turning prop.
Old 11-27-2009, 06:34 PM
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pe reivers
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Default RE: Some .60s

The one we ran had a Graupner 14x7 on it I believe. It may have been APC though, I'm not 100% sure. The sharp APC would have hurt the guy plenty due to the engine's tightness.
Run on 82/18 meth/aerosynth, no nitro. It started out squeeking tight at 9400 rpm, and at the end of the season limbered up a little and turned 9600 consistently.
Old 11-27-2009, 08:18 PM
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Default RE: Some .60s

Is the MVVS 60 diesel still available? If you have them Pe please send me a pm (US - Wisconsin 53122)

Thanks, Jim
Old 11-27-2009, 08:32 PM
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Default RE: Some .60s

http://mvvs.nl/

Click Diesel on the left, scroll 3rd engine down.
Old 11-28-2009, 05:39 PM
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pe reivers
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Default RE: Some .60s

Not conversion heads, check out engine #3091, top of page, engines.
Old 12-22-2009, 05:41 PM
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Default RE: Some .60s

I used to have both the PAW .60 R/C TBR and the MVVS G/D FS .61 R/C, I traded the PAW .60, as it was a disappointment to me.

The PAW .40 produced surprisingly good power for what I will call a "traditional" diesel.

The PAW .60 did not (in my hands anyway). Dave's numbers confirm why I kept my MVVS .61 diesel
Old 12-22-2009, 07:35 PM
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Default RE: Some .60s

My PAW .60 and PAW .40 both turn a 12/6 prop at the same rpm? Maybe a weak PAW .60 as the MVVS .61 is much more powerful. My MVVS .61 now sports a Davis head.
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Old 12-22-2009, 09:37 PM
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Default RE: Some .60s

Jack A few years back when Just Engines UK was an MVVS dealer picked up the 40 and 61( the 61 was a combo deal with the factory head)
After a glow break in on went the MVVS diesel head-ISSUE- as it came no way to lock the compression screw, it backed out on its own while running. A call to davis got me his head for the 40 and the 61, The davis head, typical of his design, was superior in all respects to the factory
one (the 61), The 40 requires no comment one of my best 40 conversions, martin
Old 12-22-2009, 10:51 PM
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Default RE: Some .60s


ORIGINAL: [email protected]

My PAW .60 and PAW .40 both turn a 12/6 prop at the same rpm? Maybe a weak PAW .60 as the MVVS .61 is much more powerful. My MVVS .61 now sports a Davis head.

I believe that Eric Clutton referred to the PAW 60 as a big friendly lump.
Dennis
Old 12-22-2009, 10:55 PM
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Default RE: Some .60s

I got my MVVS .61 as a glow engine from Carlson and the MVVS diesel head separate. Installed the diesel head never having run the engine on glow. Broke in as a diesel with a 12/6 prop. Used props from 12 inch to 16 inch diameter. I never had a problem with the compression screw backing out while running. Another fellow I know had a problem with his MVVS .61 diesel head compression unable to reduce compression once running. I never had this problem either. I have always hand started the engine and have not used a starter in this engine. I have heard reports of braking the crank when using a starter. Jack

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