Mailing List flyrotary@lancaironline.net Message #8803
From: Al Gietzen <ALVentures@cox.net>
Subject: RE: [FlyRotary] 20B vs 13B
Date: Wed, 2 Jun 2004 11:20:20 -0700
To: 'Rotary motors in aircraft' <flyrotary@lancaironline.net>

Bryan;

 

I went with the 20B on my Velocity SE because I made the decision 5 years ago.  I’d think now the way to go is Renesis.  For the CG issue; move the engine a few inches, or put on a turbo and intercooler.

 

Al

 

 

Hi all,

 

I have been lurking in the background trying to learn what I can.  I intend to use a rotary in the BD-4 I am currently building.  It will be some time before I actually need an engine but there are some questions I have regarding the use of a 13b vs. a 20b.

 

1:  What is the difference (average installation) between the installed weight of the two?

 

2:  What is the cost difference in 13b NA, 13b turbo, 20b NA?

 

3:  Do Tracy's components work with the 20b (EC2 and RD-1C)?

 

The reason I ask these things at this point is that I am (as most) building on a budget.  I also am at a stage that I need to make a decision about whether or not to extend the fuselage on my plane.  The back seat in a BD-4 has practically no leg room.  I am looking at extending the fuselage to get 5"-6" more inches leg room in the back seat.  This would work if I can afford a 20b to counter the change in CG that comes with the fuselage extension.  And there is also the fact that more power is always a good thing.

 

Thanks in advance for any help given,

 

Bryan

 


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