REFLECTOR: Pitot tube

[Laurence Coen]

Connected in parallel with the cooler would prevent any flow problems. 
Electrically heated pitot tubes need to supply enough energy to overcome the 
cooling effect of that 200 MPH breeze during flight and unless they have a 
thermostat get way too hot for a fiberglass mount on the ground.  An oil 
heated pitot would never get hotter than the oil just like the fiberglass 
mounted oil cooler.  This also means that the oil heated pitot would need a 
heating jacket that extends full length plus a wrap of insulation on top of 
that.  Sounds a little bulky which is probably why we haven't seen one 
before.  Maybe not practical but a really cool idea.

Larry Coen
N136LC

--------------------------------------------------
From: "Victor" <velocityoner at yahoo.com>
Sent: Monday, October 12, 2009 11:33 PM
To: "velocityxlfg" <velocityxl at fastmail.fm>; "Velocity Aircraft Owners and 
Builders list" <reflector at tvbf.org>
Subject: Re: REFLECTOR: Pitot tube

> Sounds like a good idea. My only concern is the increased resistance on 
> the oil pump. Velocity told me not to run my pitot head unless I was 
> flying because it could damage the glass.
> Victor
> N93DV
>
> Sent from my iPhone
>
> On Oct 12, 2009, at 6:34 PM, "velocityxlfg" <velocityxl at fastmail.fm> 
> wrote:
>
> What do you guy think about using the oil from the engine to heat a Pitot
> tube. You would never have to turn it on . The oil is already being
> run to the front for the heater in the nose. Simple design where the oil 
> flows around
> the pitot tube and you could have a heated pitot tube with no current 
> draw?
>
> What do you think?
>
> Ron
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