Boeing CHT guage

This was in Warrens collection of parts. Does anyone know anything about it? Googie doesn't give.

[Amail]

Ping Ultra FEI, which has taken over Lewis Engineering company's product line.

http://www.ultra-fei.com/electro-mechanical

Cool - thx

[fanaudical]

Interesting - I can't think of a single Boeing piston engine aircraft that didn't use radial engines.

[recycled sixtie]

Well CHT stands for cylinder head temperature. That must be super old. I am guessing 1940's or 1950's or maybe even 1930's? The fact that the guage has two indicators makes it interesting.
If it has two indications so one for each cylinder? So can I assume it is a two cylinder engine?

[crustychief]

EGT? carb temp? for a twin like a b25?

[Skytrooper]

I work at Ultra Flightline

[Porsche-O-Phile]

Typically used on piston twins. Yes, looks quite old. Don't know much beyond that (I've flown many a/c with similar gauges but not that particular one!)

[recycled sixtie]

Originally Posted by crustychief

EGT? carb temp? for a twin like a b25?

CHT I think means cylinder head temperature.

[tcar]

Originally Posted by crustychief

EGT? carb temp? for a twin like a b25?

CHT= Cylinder Head Temp...

B-25 was a North American plane, not Boeing.

Boeing 247 is all I can think of.

B tried to make the 247 "the" airliner but was overshadowed by the DC-2 and DC-3.
Part of the issue was that B would only sell them to United Airlines, which they owned at the time.

[crustychief]

Originally Posted by tcar

CHT= Cylinder Head Temp...

B-25 was a North American plane, not Boeing.

Boeing 247 is all I can think of.

B tried to make the 247 "the" airliner but was overshadowed by the DC-2 and DC-3.
Part of the issue was that B would only sell them to United Airlines, which they owned at the time.

I understand CHT = cylinder head. but it is not indicated on the front of the gauge. I work on old warbirds and many of them use gauges from manufacturers other than the prime contractor. Most of our planes have CHT on the gauge and also list the temps in X100. we do have planes with carb temp monitors but we only have three twin engine planes. B-25, C119, and a DC3.

[island911]

247 (not seeing it)

[Eric Coffey]

Originally Posted by Porsche-O-Phile

Typically used on piston twins. Yes, looks quite old.

Yep, looks like a dual CHT for an older/vintage piston twin (DC-3, etc.).
Or, could be from an older 4-engine piston as well (B-29, etc.), where there would be two gauges.
Typically there would be a placard attached to the top mount screws to designate which bank (and the individual engines) each gauge/needle corresponded to.

[Walter_Middie]

http://atomictoasters.com/wp-content/uploads/2012/12/XB-39-Engineers-Station.jpg

An internal search of the Boeing website turned up nothing. Google search of 77B112 Lewis turned up electrical temp gauge.

Looks to be from the era of B-17, B-29, etc....Picture above is a B-39. Looks close.

[bell]

Ron madaio used to run one in his 911, the 2 channel one (like yours) ended up in my 911 and he went with a 6 channel digital one that was over the top and super cool.
It used sensors that replaced the crush washers on the spark plugs.

[304065]

Mark I think it's a Turbocharger inlet temp gauge from a Boeing Stratocruiser. From the flight engineer panel on the left side. Like this:





Our friend probably got it from the boneyard or a surplus store to measure something or other.

[Eric Coffey]

Originally Posted by 304065

Mark I think it's a Turbocharger inlet temp gauge from a Boeing Stratocruiser. From the flight engineer panel on the left side.

I would think the temp range is too low for a turbine inlet temp gauge. My money is on CHT for a twin or 4-engine piston.

[fanaudical]

My thought is that this is for a horizontally-opposed engine (2, 4, or 6) which is why I made the comment about the radial engines above. I have a similar gauge from Westach installed in my Targa for monitoring CHT (center cylinder each bank).

Cool panel pics - I'll admit I have what is probably a "gauge fetish" - I love well-presented analog gauge dash panels. I've not bought certain cars just because the dashboard layout was "unacceptable".

[Superman]

Originally Posted by bell

Ron madaio used to run one in his 911, the 2 channel one (like yours) ended up in my 911 and he went with a 6 channel digital one that was over the top and super cool.
It used sensors that replaced the crush washers on the spark plugs.

Yes, over the top. I remember....

Yes, Cylinder Head Temperature. Often, the sending unit was at the spark plug.