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mvvs 26 petrol and tuned pipe

Old 08-25-2007, 08:38 AM
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aeroboy1293
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Default mvvs 26 petrol and tuned pipe

Hi there.

Can you give me a bit of info with regard to the throttling and mid range performance of the 26cc IFS petrol motor.
It's a toss up of either the MTW TD40 canister or the 3266 tuned pipe.

The motor will replace my problematic YS 140-sport and will be fitted to my X-TECH YAK - 54.
The model is 73" span and weighs almost 11lbs.

Would a 12oz tank be sufficient for a 10 to 12min flight, which is a mix of imac and a little 3d.

Prop wise either a Mejzlic 18 x 8 two blade or 16 x 11 three blade.
Oil wise, can I use 3W's own fully synthetic oil which is currently mixed at 50:1 for use in my 3W-55i powered WH Extra 300S.

Any info would be much appreciated in helping me to make a well informed purchase.

Regards

Aeroboy.
Old 08-25-2007, 04:13 PM
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pe reivers
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Default RE: mvvs 26 petrol and tuned pipe


ORIGINAL: aeroboy1293

Hi there.

Can you give me a bit of info with regard to the throttling and mid range performance of the 26cc IFS petrol motor.
It's a toss up of either the MTW TD40 canister or the 3266 tuned pipe.

The motor will replace my problematic YS 140-sport and will be fitted to my X-TECH YAK - 54.
The model is 73" span and weighs almost 11lbs.

Would a 12oz tank be sufficient for a 10 to 12min flight, which is a mix of imac and a little 3d.

Prop wise either a Mejzlic 18 x 8 two blade or 16 x 11 three blade.
Oil wise, can I use 3W's own fully synthetic oil which is currently mixed at 50:1 for use in my 3W-55i powered WH Extra 300S.

Any info would be much appreciated in helping me to make a well informed purchase.

Regards

Aeroboy.
*- The 3266 tuned pipe has best power and excellent throttle response, if used with the original header. If you need a longer header, go with the TD30 or TD40 muffler.
*- the engine uses 3/4 oz/minute, using an 18x8 prop. The 16x11 is not such a good choice.
*- oilwise, use what MVVS prescribes, and use that in all your engines, not the other way around.

Old 08-25-2007, 04:59 PM
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aeroboy1293
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Default RE: mvvs 26 petrol and tuned pipe

Hi Pe.

Is 3W's own oil not as good as made out then!!. I've only just purchased a litre and at £15 it's not cheap. I may have some difficulty in obtaining Mobil 1 2T locally it may well have to be mail order.

Is the 26 IFS going to be a good match for the YS 140 Motor that I have removed from the YAK due to problematic running and very expensive fuel.

Have you any good information regarding baffling the motor in a Yak cowling ?

Reg's

Aeroboy
Old 08-28-2007, 01:28 PM
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pe reivers
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Default RE: mvvs 26 petrol and tuned pipe

ORIGINAL: aeroboy1293

Hi Pe.

Is 3W's own oil not as good as made out then!!. I've only just purchased a litre and at £15 it's not cheap. I may have some difficulty in obtaining Mobil 1 2T locally it may well have to be mail order.

Is the 26 IFS going to be a good match for the YS 140 Motor that I have removed from the YAK due to problematic running and very expensive fuel.

Have you any good information regarding baffling the motor in a Yak cowling ?

Reg's

Aeroboy
Do not get me wrong. 3W oil, whatever it is, is quite popular amongst German pilots, but as long as I do not know what it is, I will not recommend it for MVVS engines, because they have ultimate demands on the oil used, due to the very high specific power output, and cantilever crank construction.

For a baffling example, look at the " Evolution 58GX2 ign. LED flashing" thread at http://www.rcuniverse.com/forum/m_62...tm.htm#6255021
I will post a complete report soon in my own forum www.prme.nl/forum (working on it, but time is not on my side)
Old 09-30-2007, 04:06 PM
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John E
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Default RE: mvvs 26 petrol and tuned pipe

Aeroboy,

I also can't comment on the 3W oil, but I have to say that having seen the insides of MVVS engines running exclusively on the recommended oil, and parts from engines that haven't, I have no doubt that MVVS have got it absolutely right!

The oil is readily available from MVVS - I just need to check the UK postal regs before buying it.

BTW, the running in oil supplied with the 45, 58, and 116 is the same Mobil oil.
Old 10-12-2007, 08:42 AM
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DarZeelon
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Default RE: mvvs 26 petrol and tuned pipe

This is a test post.
Done at Marc's request.

Moderators, please remove.

Thanks.
Old 10-28-2007, 11:56 AM
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Default RE: mvvs 26 petrol and tuned pipe

test post
Old 11-01-2007, 01:02 AM
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Default RE: mvvs 26 petrol and tuned pipe

one more test post
Old 11-10-2007, 02:47 AM
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Default RE: mvvs 26 petrol and tuned pipe

test post
Old 11-10-2007, 01:54 PM
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Default RE: mvvs 26 petrol and tuned pipe

test post
Old 11-10-2007, 02:01 PM
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Default RE: mvvs 26 petrol and tuned pipe

eee
Old 11-10-2007, 02:01 PM
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Default RE: mvvs 26 petrol and tuned pipe

test
Old 11-11-2007, 06:26 PM
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Default RE: mvvs 26 petrol and tuned pipe

Your work was succesful! I finally get mail notices again.

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