Subject: First taxi test.
From: Rotary Engine
Date: 3/9/2007, 1:40 PM
To: AARotary Engine


    > Hi Paul,
    >
    > I did my first taxi test last Friday. I taxied for about 30
    > minutes and it didn't even get close to overheating. Of course, the
    > Texas summer isn't here yet, so we'll have to wait and see how it
   does
    > then. Everything worked as intended and it was great to experience my
    > little creation moving under its own power. First flight is still a
    > month or so off.
    >
    > Thanks,
    > Mark S
    >
    > Congratulations Mark. Your 3 rotor engine installation looks great.
    > Got any later pictures?
    >
    > Paul Lamar ...No rotor no motor.

   Congratulations Mark.

   If you don't mind a bit of critique...
   I notice you have some long runs of stainless braided hose which look
   poorly
   supported. This stuff acts like a saw on aluminum with the a bit a
   vibration. Especially where it loops between the cooler and the PSRU it
   would appear that it could saw on the Al coolant system parts.

   Have a read up on the firewall forward section of AC 43 -13

   Properly supporting lines hoses and wiring firewall forward is something
   Cirrus does very poorly. The SR22 I did an import inspection on looked
   like
   it was asking for all sorts of sensor harness problems in a couple of
   hundred hours.

   Regards,
   Mark Wrathal




   Hi Mark,
   Not a problem, I welcome any constructive criticism. Sometimes pictures
   can be deceiving. As in the line going between the oil cooler outlet
   and the psru inlet. It is a -4 and only about 6" long and not even
   close to touching anything else. Originally, it was aluminum tubing,
   but I didn't feel comfortable with that, so I changed it to braided SS.


   Some of the other lines may need to be tied down better. I'll look at
   that again tomorrow. If you look closely you will see that I used
   rubber snubbers wherever two lines crossed. An old airport bum showed
   me that trick (using a piece of heater hose and run a tie wrap through
   the center and around both lines). It keeps them from rubbing and also
   from moving around and touching against anything else. I used some ADEL
   clamps in various places to support hoses and keep them from touching
   (such as the line going past the alternator, or the long one going from
   front to rear over the top of the engine. It has two clamps (maybe it
   needs two more?).

   Thanks for mentioning this. I'll look at it again with a more critical
   eye.

   Mark S.


Mark,

I'm wondering if I missed it so I'll ask, what's the estimated weight of
the 20B total installation?

Allen Slominski
Houston, TX


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