REFLECTOR: Aileron Cables(Fire-sleeving)

Wed Apr 11 12:43:36 CDT 2007

Hiroo,

I use a temperature sensor in the cowling exhaust air.  Normally the temp. maxes out at 140 F and I have it set to alarm at 150F.  It could possible detect a broken exhaust stack also.  I know others have fusible links strategically located and wired in series to give an alarm.

Larry Coen
N136LC
  ----- Original Message ----- 
  From: Hiroo Umeno 
  To: Velocity Aircraft Owners and Builders list 
  Sent: Wednesday, April 11, 2007 5:02 AM
  Subject: Re: REFLECTOR: Aileron Cables(Fire-sleeving)

  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 onthe ground is what you need.  The flight must be terminated post haste,before the fire proceeds to catastrophic airframe failure.  This would bemeasured in seconds, not minutes.  No consideration of continuing the flightto 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] OnBehalf Of Laurence CoenSent: Tuesday, April 10, 2007 9:55 AMTo: Velocity Aircraft Owners and Builders listSubject: 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 CoenN136LC  ----- Original Message ----- From: "Keith Hallsten" <KeithHallsten at quiknet.com>To: "'Velocity Aircraft Owners and Builders list'" <reflector at tvbf.org>Sent: Monday, April 09, 2007 3:19 PMSubject: Re: REFLECTOR: Aileron Cables    About year 2000 it was determined experimentally (at the moment I forget bywho) that the original aileron push-pull cables could seize if overheated(by say, an exhaust leak) in flight.  [The plane was landed successfullywith rudders alone.] This got the collective attention of the reflectorites and a bunch of uswent in on a group buy of higher- temperature-rated push-pull cables.  Atthat time it was also emphasized by all that we should be fire-sleeving theportion of the cables that is on the engine side of the firewall.  I believethat Velocity subsequently began providing a higher temperature-ratedpush-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 firesleevein a fire or major exhaust leak (no one wanted to volunteer), so it's notknown whether that is sufficient.  You could be that volunteer and let therest of us know how it works out! Keith Hallsten  -----Original Message-----From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] OnBehalf Of lawrence epsteinSent: Monday, April 09, 2007 4:37 PMTo: reflector at tvbf.orgSubject: REFLECTOR: Aileron Cables I know that years ago it was determined that the Aileron push-pull cableshad to be fire sleeved on the engine side of the firewall. I have theoriginal cables. Do these need to be replaced entirely, or can I just putfire sleeve over them? Larry Epstein  _______________________________________________To change your email address, visithttp://www.tvbf.org/mailman/listinfo/reflector Visit the gallery!  www.tvbf.org/galleryuser:pw 

--  -    I would rather be exposed to the inconveniences attending too much liberty than to those attending too small a degree of it.     Thomas Jefferson to Archibald Stuart, 1791. ME 8:276 

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