Subject: Weekly quiz.
From: ACRE
Date: 9/20/2004, 3:26 PM


In the context of cooling system design what is wrong
with these pictures?

Sorry about the bad focus.

Paul Lamar

"Kent, Russell" wrote:

Forgive me Paul, but I couldn't constrain myself to cooling system
defects.

1. Using a NACA-style air intake to feed a heat exchanger, in this case,
the intercooler is not recommended because backpressure from the heat
exchanger causes the boundary layer to build up around inlet, leading to
insufficient cooling air being entrained by the NACA-style air inlet.

2. It's hard to tell, but the intercooler "diffuser" doesn't look like a
type that will effectively convert dynamic pressure to static pressure.

3. An apparently unshielded exhaust manifold radiates heat onto backside
of intercooler.

4. Using hot-pink plastic tie-wraps to secure thermal barrier to wires
(?) near unshielded exhaust manifold seems a bad idea as heat will
prematurely age the tie wraps, which will fail allowing heat shield to
depart protected wires, which will then fail from heat-induced aging.
It's also probably an unwise choice to use the same tie wraps to secure
fire sleeve to the fuel line and the motor mount.

5. Fire sleeve secured to oil line (?) by white tie wrap which is
unshielded from the exhaust manifold (visually beneath the intercooler).

6. Intercooler-compressor flexible interconnects appear unshielded from
exhaust manifold.

Russell Kent

 
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