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need help for OS46 FX and MACs tuned pipe

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need help for OS46 FX and MACs tuned pipe

Old 09-23-2015, 01:43 PM
  #1  
Marki
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Default need help for OS46 FX and MACs tuned pipe

Hi guys,

I am planning to buy a MACs tuned pipe (macspro.com) in orden to install it in a profile Top Model katana v2 46 and an OS46FX.

I am trying to find out if i need a muffled/unmuffled/ or quiet tuned pipe however i am totally confuse an do not know shock option to choose. In the present i feel the plane needs more torque in order to torque roll or making lthe harrier. I need more power so in case i have to react quickly be able to avoid a plane crash.

could you please give me a hand...

Regards from marki
Old 09-23-2015, 05:14 PM
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philfun
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Hello Marki,
What prop size are you using on the OS 46FX ?What weight is your plane ?The tune pipe(muffled or not muffled) on a 2 stroke is to get a maximum power at a specific RPM.
What you need to hover is the opposite :a linear throttle power.
Answer the 2 questions to have some idea of your combo.
Phil
Old 09-24-2015, 12:02 AM
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Marki
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Hi Phil,

Thanks a lot for your answer...here my airplane data:

Wight: around 2.05Kg
Length= 47"
Wingspan=48"

In the present, I am using a Master Aircraft 11x6 but if I get the pipe i guess i will have to change it to a bigger diameter one.

What is confusing me is the diffrence between muffled/unmuffled or quiet. I contact MACs and explain me that the quiet one is smooth; however, I am confused because I do not know if it will give me more power (torque).

In base to my explanation, What would you recomend me?

Regards

Marki
Old 09-24-2015, 05:57 AM
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jlguru
 
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I cannot comment on tuned pipes, but suggest that, before you commit to a tuned pipe, you try some other propellers. Specifically, try an APC 11.5x4 and an APC 12.25x3.75 and see how it goes. And, take your stock muffler apart and remove the interior baffles. These two changes may give you some/most of the performance you are looking for.

Live long, and prosper
Jerry
Old 09-24-2015, 10:15 AM
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kmeyers
 
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jlguru + 1
APC 12 x 4 is another one

Marki
I think you are using the wrong prop for your application as well. High pitch for speed Low pitch for torque.
Old 10-23-2015, 06:40 PM
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Rocketman612
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The APC 12.25x 3.75 is the prop. Had on on my Morris the Knife with a 46FX and she performed wonderfully. Hover fast spool up. A real winner.


Pete

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