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Author Topic: Question on the new .75 's from Randy S. and Richard O.  (Read 1069 times)

Online Norvaldo

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Question on the new .75 's from Randy S. and Richard O.
« on: October 16, 2006, 07:14:51 AM »
The PA Merlin .75 and the RO-JETT .76

I have read from other treads that these fit  a ST .60 mounting which  in mm is 20/44
However ; what about tank size ?
I have currently 6 OZ (one 6.5 oz) tanks in my planes.
Is that sufficient for a full pattern run ?
 
Norvald Olsvold

Offline RandySmith

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Re: Question on the new .75 's from Randy S. and Richard O.
« Reply #1 on: October 16, 2006, 11:25:50 AM »
Not really  you will need to plan  on an  8 ounce  tank,  athough  some  are doing the pattern on a little  less.  I need  7 ounces min.


The  PA 75  is the  same  bolt  pattern as  the  ST 60.  I do not know  about the  Jett
Regards
Randy
« Last Edit: October 16, 2006, 02:27:45 PM by RandySmith »

Offline Ron King

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Re: Question on the new .75 's from Randy S. and Richard O.
« Reply #2 on: October 16, 2006, 03:01:50 PM »
The RO-Jett 76 has the same mounting dimensions as Richard's other engines (51, 61, and 65). It is not the same as the ST 60.

I have flown the pattern with a six ounce tank and the RJ 76, but I don't recommend it. You have to choke the engine down too much.

Ron
Ron King
AMA AVP District 4
Wannabe Stunt Pilot since 1963
 Amateurs practice until they get it right; Pros practice until they cannot get it wrong.

Offline peabody

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Re: Question on the new .75 's from Randy S. and Richard O.
« Reply #3 on: October 16, 2006, 06:42:53 PM »
Winfred is flying a RO Jett 90 with a great big grin of late....
I have no idea what sized tank he is using...


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