DA85 on pipe! Results please.

[sprice50]

	Quote: Originally Posted by emvin
	Yes if it happens again I may have to upgrade. Then I will need a new airframe as well as the QQ 101 is set up for the 85. It would be a shame.

I think the issue may be the motor being underpropped for the type of performance you are getting from the pipe. You said you were getting 6950 on a 26x10 Mej. Imagine what was happening in the air. There would be big loads on the engine at that RPM.

I suggest getting a 28x10mej. I haven't heard of this occuring on a larger prop with the pipe.

[airlyons]

Hey guys... is there a sheet for mounting. ( with the lines and points for where to mount on the engine box)

Also... can you order custom headers? If so... from who?

What are your thoughts on mounting a pipe under the belly? No room in my Edge :-(

Thanks,

Chris

[sprice50]

I wouldn't go for a pipe under the belly personally. I would just run the new DA100 on stock muffs (about the same for noise) and power.

[pe reivers]

	Quote: Originally Posted by sprice50
	I think the issue may be the motor being underpropped for the type of performance you are getting from the pipe. You said you were getting 6950 on a 26x10 Mej. Imagine what was happening in the air. There would be big loads on the engine at that RPM. I suggest getting a 28x10mej. I haven't heard of this occuring on a larger prop with the pipe.

Forget about the engine load, but replace engine load with noise load.
A well tuned 80cc engine on pipes will turn in the 5800 - 6500 rpm range, and the prop should suit the power the engine will deliver at those rpm. Larger diameter/larger pitch props perform much better in ALL respects, and do not produce deafening noise (>80dbA) at the pilot's position. It takes some getting used to, but once accomplisleshed it proves that small props just produce the FEELING of plenty gusto, without producing the PERFORMANCE.

[M.C]

Interesting points there, Pe.

My 85 is in an Aeroworks 35% Extra 260...awesome setup - 26.5lbs dry.
MTW RE3 pipe
~15" KS flexi header
Mej 28x10
95 octane fuel, 50:1 Bel Ray H1R
Altitude 50-100 ft above sea level

6,200 - 6,300 RPM


Rgds,
Matt

[sprice50]

	Quote: Originally Posted by M.C
	Interesting points there, Pe. My 85 is in an Aeroworks 35% Extra 260...awesome setup - 26.5lbs dry. MTW RE3 pipe ~15" KS flexi header Mej 28x10 95 octane fuel, 50:1 Bel Ray H1R Altitude 50-100 ft above sea level 6,200 - 6,300 RPM Rgds, Matt

Hello Matt,

This is the information we have all been waiting for in this thread - a direct comparison of the KS1090 to the RE3.

Our results have consistently been 6,450 on a brand new motor on Mej 28x10 so quite a lot higher than your performance. Is your motor broken in yet? Mine was on Castrol Super 2 oil at 32:1.

I think your setup is a touch lighter and a bit quieter though.