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Tailpipe exit diameter for P-100?

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Old 12-16-2016, 08:51 AM
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mr_matt
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Default Tailpipe exit diameter for P-100?

What are you guys running for tailpipes on P-100 or similar smaller 100 Newton turbines (especially with bypass)

Thanks in advance
Old 12-16-2016, 09:06 AM
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rfbenn
 
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3inch tailpipe on my Classic Flash with bypass and P100, standard item that came with the plane from Carf.

Rob
Old 12-16-2016, 11:47 AM
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According to JetCat 2015 catalogue p-100 pipe exit diameter must be 80/85mm .Inlet must be 85mm.
Old 12-16-2016, 01:31 PM
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Dave Wilshere
 
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Std CARF pipe is much bigger than 3" Rob, its .3 1/2"!

Perfect for P-100 in full duct is 82mm with 20mm tailcone to pipe gap. No taper

DW
Old 12-19-2016, 01:47 PM
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..so would bypass effect the diameter of the pipe?
Old 12-19-2016, 01:57 PM
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Dave Wilshere
 
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Generally i'd say no. We are always compromising between static/slow and hair on fire, if the inlets and duct are properly designed they wouldn't change the pipe diameter I ran. Might change the turbine-pipe gap I chose.
Old 12-19-2016, 02:32 PM
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Originally Posted by Dave Wilshere
Std CARF pipe is much bigger than 3" Rob, its .3 1/2"!

Perfect for P-100 in full duct is 82mm with 20mm tailcone to pipe gap. No taper

DW

Dave what does this mean in terms of a full bypass, since there is no "gap" per se.

Thanks

Last edited by mr_matt; 12-20-2016 at 07:04 AM. Reason: Edit: fixed spellin
Old 12-20-2016, 12:04 AM
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Dave Wilshere
 
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Matt

Sorry, don't understand!?

Dave
Old 12-20-2016, 07:03 AM
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If you have a full bypass then where is the gap? Inlets go to bypass goes to pipe.
Old 12-20-2016, 07:20 AM
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Dave Wilshere
 
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Originally Posted by mr_matt
If you have a full bypass then where is the gap? Inlets go to bypass goes to pipe.
Ducted or unducted the gap is always between the turbine tail cone and steel tube the hot gasses fire down. 20-22mm would be what I would set it.

Dave

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