Dennis,

flying (but nothing homebuilt..... yet).

a) Check your installation: Are the water/oil paths longer than the
installation in the car?
No - use the same size as in the car
Yes - go one size bigger

b) Part of the pressure drop for longer path distance and additional
curves/necks can be reduced with a bigger "tube": slower flow, less relative
drag;

c) Clean every accessible connection/corner/neck/etc. for smooth flow.
Its amazing how dirty for example oilcooler/remote filter adapter plates
are - casting flash/sharp corners/etc. every sharp corner produces eddies
which essentially reduce flow cross section.

d) Better to err on the high side - however the smallest opening on/in the
block will be the ultimate limit - however consider b)

FWIW,

Thomas J.



----- Original Message -----
From: "Bobby J. Hughes" <bhughes@qnsi.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Sunday, February 05, 2006 5:37 PM
Subject: [FlyRotary] Re: Hose size for the coolant


Dennis,

The Renesis waterneck in \ out is 1.25 id. I plan to stay with that size
to \ from radiator. Aluminum tube mostly.

Oil.. I have ordered -10 hose and adapters but I think -8 would work.

Bobby

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Dennis Haverlah
Sent: Sunday, February 05, 2006 4:13 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Hose size for the coolant

Ed and others flying

What size coolant lines are adequate?  I may go with AN or socketless
type hose and am considering 1 inch ID for the coolant and 1/2 inch for
the oil lines.

Thanks,
Dennis H
RV 7A/Renesis




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