I used a solid-state sensor, the National LM135AH-LM235AH in a metal TO-46 package
Elippse -
Do you have a pic of your install?
Hi Bill - this is interesting info. Can you post some carb temps that you have seen (ideally with OATs)? I've been planning for a carb and after an unpleasent ice incident at 65 OAT I'd like to have a carb temp sensor. I've "heard" that most RV's don't have very effective carb heat, but I cant find anyone who's posted any numbers. Maybe you have them?BTW, I found with my installation (RV-9 w/ O-290-D2) that the carb temp actually goes up when you throttle back.
Hi Bill - this is interesting info. Can you post some carb temps that you have seen (ideally with OATs)? I've been planning for a carb and after an unpleasent ice incident at 65 OAT I'd like to have a carb temp sensor. I've "heard" that most RV's don't have very effective carb heat, but I cant find anyone who's posted any numbers. Maybe you have them?
Thanks for any info,
Don't waste your time... not accurate period!
Are you referring to the probes like on the RMI uMonitor or devices like the Iceman?
Right now, I'm rejigging my carb heat system to enclose the sides of the flange that sits on the top of the FAB. I've already added a Wicks heat muff, and I think the extra work I'm doing now will help with the temp rise.
I'll post pics when complete.
Vern
so, did you notice the reading when it iced or is the probe location to far from where the ice occurs?By the way, I have experienced carb ice three times in 850 RV-6 hours. Twice on the ground during taxi to runup, and once in the air during cruise. In both instances, the standard Vans carb heat setup quickly cleared the ice.
so, did you notice the reading when it iced or is the probe location to far from where the ice occurs?
I think I see the same results with my RMI probe. I find the carb temperature guage to be of limited use except that it will indicate the temperature rise when you use carb heat.
Right now, I'm rejigging my carb heat system to enclose the sides of the flange that sits on the top of the FAB. I've already added a Wicks heat muff, and I think the extra work I'm doing now will help with the temp rise.
I'll post pics when complete.
Vern
Here's the pics. First photo are the bits to seal off the flange (including cardboard templates). Second photo shows the aluminum bits attached and the third pic is the final configuration with the strips of baffle seal to help seal around the actuator.
...
According to the Van's Aircraft construction and operating manual, one method of building the
internal carburetor heat system is to "run a 2-inch air hose from a heat muff and position it to
feed into the alternative air inlet of the carb[uretor] air box without being attached and closed."
According to the FAA inspector who examined the aircraft following the accident, this is the
method by which the pilot constructed the airplane. According to the inspector, the 2-inch hose is
not large enough to adequately supply enough heat to the carburetor to sufficiently melt the ice.
The aircraft was issued an airworthiness certificate by the FAA on August 24, 1995. [/i]
L.Adamson --- RV6A
Ok, we took note of what was going on today. OAT's at 10,500 were in the 20's. Carb temps were around 50. Slowing down and entering the pattern the OAT's were up to 44 and the carb temp was at 70. Pulling the carb temp raised it to 74 degrees.Hi Bill - this is interesting info. Can you post some carb temps that you have seen (ideally with OATs)? I've been planning for a carb and after an unpleasent ice incident at 65 OAT I'd like to have a carb temp sensor. I've "heard" that most RV's don't have very effective carb heat, but I cant find anyone who's posted any numbers. Maybe you have them?
Thanks for any info,