REFLECTOR: Titanium Firewall

[Alex Balic]

My bad- I know the temp of stainless off hand, but had to look up the Ti -
Google took me to an British site, and I guess they just assume you know
that they are talking Celsius- One thing about Ti is that is pretty abrasion
resistant as well, and probably easier to drill than SS- still it is pretty
pricy- I made my firewall from stainless sheet from wicks- can't remember
exactly, but I believe it was about $125 or so, I had to buy some Ti sheet-
fro a heat exchanger project  got a thin piece "cheap" from eBay- only about
3"x 8" cost me 25 bucks, and I know that the thermal conductivity is
strangely high- that entire sheet got hot within seconds when I Tig'd it a
couple of months ago- as long as you have some insulation behind it should
not pose a big problem though I would guess- I used some ceramic fiber
batting behind my firewall- can't remember the R-value, but it was fairly
high.

 

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From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of John Tvedte
Sent: Tuesday, May 15, 2007 9:38 AM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Titanium Firewall

 

Alex,

 

Perhaps you mixed units...?

 

Melting point of Ti (affected by specific alloy) - is approx. 1668C - 3034F
- so 400+F higher than SS.

 

Density of Ti - is approx. .16 lb/cu in vs. .285 for SS (316 alloy) -
approx. 56% lighter than SS.

 

BTW - when I ordered my engine install kit - I asked Velocity if they would
sell it without the SS - sure not a problem - they took the $ off the price
of the kit too.

 

John

 

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From: reflector-bounces at tvbf.org on behalf of Alex Balic
Sent: Tue 5/15/2007 9:18 AM
To: 'Velocity Aircraft Owners and Builders list'
Subject: Re: REFLECTOR: Titanium Firewall

I am not sure what the advantage would be unless you already happen to have
a big sheet lying around (free) - weight savings would be minor, and the
Titanium will melt about 1000 degrees sooner than the stainless (1600f vs
2600f) in addition, the thermal conductivity of Ti is higher than stainless
as well- not to mention that it is extremely expensive. I suppose the big
plus would be the hanger-talk factor.

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