REFLECTOR: Aileron Cables(Fire-sleeving)

Wed Apr 11 12:02:18 CDT 2007

This reminds me of a question I had about engine fire...

What are the indication that our engine is on fire?  On a Cessna, it is obvious since you are sitting right behind a burning engine with flames shooting out from below cowling but on our plane, how would we know we are trailing flames and black smoke behind us?

Assuming we have CHT, EGT, Oil T, Oil P, etc set up, do we get some unusual reading that tells us that the engine is on fire?  Or would loss of control the first indication that something is really gone bad?

I had a moment of scare when I saw my induction temperature go up to the point it saturated the sensor (at 200 degrees or so).  I thought I had an induction fire until I realized that on touch and go, I left the carb-heat on on a climb-out with full-power on sending a lot of hot air into the carb.

Hiroo

From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On Behalf Of Scott Derrick
Sent: Wednesday, April 11, 2007 7:20 AM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Aileron Cables(Fire-sleeving)

If you have an engine fire, the absolute first order of business is to shut it down. Immediately if not sooner.

Scott

Keith Hallsten wrote:

Larry,

If you have an exhaust failure or engine fire, a LITTLE time to get it on

the ground is what you need.  The flight must be terminated post haste,

before the fire proceeds to catastrophic airframe failure.  This would be

measured in seconds, not minutes.  No consideration of continuing the flight

to an airport should be made, unless the airport is right under you.

Therefore, firesleeve on the aileron cables meets the need very nicely.

Keith Hallsten

-----Original Message-----

From: reflector-bounces at tvbf.org<mailto:reflector-bounces at tvbf.org> [mailto:reflector-bounces at tvbf.org] On

Behalf Of Laurence Coen

Sent: Tuesday, April 10, 2007 9:55 AM

To: Velocity Aircraft Owners and Builders list

Subject: Re: REFLECTOR: Aileron Cables(Fire-sleeving)

All,

Fire-sleeving will work on things like liquid carrying lines, (oil and

fuel), because the liquid flow cools the line and the fire-sleeve slows the

transfer of heat into the line.  Putting it on the aileron cables will slow

the melt-down but not prevent it.  Using a heat shield is a better solution.

Larry Coen

N136LC

----- Original Message -----

From: "Keith Hallsten" <KeithHallsten at quiknet.com><mailto:KeithHallsten at quiknet.com>

To: "'Velocity Aircraft Owners and Builders list'" <reflector at tvbf.org><mailto:reflector at tvbf.org>

Sent: Monday, April 09, 2007 3:19 PM

Subject: Re: REFLECTOR: Aileron Cables

About year 2000 it was determined experimentally (at the moment I forget

by

who) that the original aileron push-pull cables could seize if overheated

(by say, an exhaust leak) in flight.  [The plane was landed successfully

with rudders alone.]

This got the collective attention of the reflectorites and a bunch of us

went in on a group buy of higher- temperature-rated push-pull cables.  At

that time it was also emphasized by all that we should be fire-sleeving

the

portion of the cables that is on the engine side of the firewall.  I

believe

that Velocity subsequently began providing a higher temperature-rated

push-pull cable for their kits, but I'm not sure about that.

I don't know if anyone tested the original push-pull cables with

firesleeve

in a fire or major exhaust leak (no one wanted to volunteer), so it's not

known whether that is sufficient.  You could be that volunteer and let the

rest of us know how it works out!

Keith Hallsten

-----Original Message-----

From: reflector-bounces at tvbf.org<mailto:reflector-bounces at tvbf.org> [mailto:reflector-bounces at tvbf.org] On

Behalf Of lawrence epstein

Sent: Monday, April 09, 2007 4:37 PM

To: reflector at tvbf.org<mailto:reflector at tvbf.org>

Subject: REFLECTOR: Aileron Cables

I know that years ago it was determined that the Aileron push-pull cables

had to be fire sleeved on the engine side of the firewall. I have the

original cables. Do these need to be replaced entirely, or can I just put

fire sleeve over them?

Larry Epstein

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