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#1
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The T337H has a heat exchanger and only uses the heat from 2 cylinders. I guess it works good because the pilots don't whine about being cold.
Kim |
#2
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I replaced the heater in my T337B two years ago with an O/H'd one from Janitrol ("Kelly Aerospace" now) and it was just under $2K through Harold Haskins (Dothan, AL). It was a totally new core and parts so while it was an "overhauled" heater it really is new now. I pulled the old one out and put the new one in and then my A&P's finished up one dififcult part of the process that was giving me some trouble and signed it off (less than $200). I spent half a day getting it out and half a day getting the new one back in. For certain steps of the in and out process it was really a 2-man job, and I had a good friend help for a couple of hours.
I can't get too excited over that endlessly quoted line "why light a fire" in the airplane for heating stuff. The heater works fine, it does the job, and if the other type had worked well at the time they designed the T's and P's I suspect they'd have used that instead. My A/C is certificated to 33K feet, and it needs a good heater when you get high and cold. Last edited by Paul Sharp : 02-17-09 at 10:14 PM. |
#3
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heat exchange
Quote:
You suppose there is a way to convert to the 337H set-up and eliminate the Janitrol heater? ________ NASH 600 SPECIFICATIONS Last edited by rmorris : 03-12-11 at 12:02 PM. |
#4
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The cost of a T337H Fwd exhaust system is 4K-5K then you have the ducting and control valves It will be much more cost effective to buy a new heater or two. The biggest problem with a Janitrol heater was getting a cracked combustion chamber and everyone expiring from CO posioning. But a heater/muffler type system will do the same thing.
Kim |
#5
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Janitrol heater
Can the Janitrol heater be removed on a P model? We operate 100% of the time in the Caribbean, Mexico and Ceentral America. Never have a problem being too cold.
I would like to permanently remove the Janitrol and get rid of some of the space consuming plumbing. However, we want to do it correctly and legally. Are there any options?
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Rick Gardner www.caribbeanskytours.com |
#6
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Janitrol overhaul or other options
OK, my Janitrol heater has now failed the decay test and is removed by the a&p doing other work on my front engine. Curious on options others have done. I need heat (turbo I usually fly high, and it has been very cold recently without a heater at 21K in November .
Looking for cost effective options, because I am already having to handle an engine overhaul right now in the pocketbook. Again, looking for all options and comments please. either her, or email me at rmorris@agsi.us Thanks, Robert |
#7
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Not many options out there Robert, find an overhauled Janitrol or go for the C&D non AD unit
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Herb R Harney 1968 337C Flying the same Skymaster for 47 years |
#8
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heat exchanger
Trading voicemails with mechanic sounds like he might be able to make a heat exchange option similar to what is in his normally aspirate skymaster and remove the janitrol heater, which was an option from factory, by doing a 337 form.
Other than the obvious. make sure my CO2 detectors in the cabin are working before each flight. Any other thoughts on the subject? What about its ability to heat at high altitudes, versus the Janirol? Anyone have the heat exchange (non-Janitrol style) heater and fly in the upper teens or even low 20s? |
#9
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Robert
Check out this thread, http://www.337skymaster.com/messages...light=janitrol There is an attachment that details the exhaust for the T model. It indicates a muff over the muffler but only one and I don't see any scat tube connections. You could try to duplicate a normal aspirated system on your T model but it will require a field approval for the STC as I don't think there is an STC out there. I could be wrong so you might want to give Don Neiser a call or Owen Bell as they may know. Good luck
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Herb R Harney 1968 337C Flying the same Skymaster for 47 years |