Search
Notices
Engineers & Technicians Aeronautical engineering and aircraft MX

Janitrol user manual

Thread Tools
 
Search this Thread
 
Old 06-25-2012, 04:37 AM
  #11  
Moderator
 
Cubdriver's Avatar
 
Joined APC: May 2006
Position: ATP, CFI etc.
Posts: 6,056
Default

The thermocouple is suppressed during heater ignition, and when that stops it shuts off the fuel flow if heater ignition should fail. I have never seen a checklist that called for cabin heat before engine start, but I suppose if one engine quits and then starts dribbling fuel it could get ignited anywhere such as at the heater.
Cubdriver is offline  
Old 06-25-2012, 06:53 AM
  #12  
Eats shoots and leaves...
 
bcrosier's Avatar
 
Joined APC: Apr 2007
Position: Didactic Synthetic Aviation Experience Provider
Posts: 849
Default

Originally Posted by Cubdriver View Post
The thermocouple is suppressed during heater ignition, and when that stops it shuts off the fuel flow if heater ignition should fail. I have never seen a checklist that called for cabin heat before engine start, but I suppose if one engine quits and then starts dribbling fuel it could get ignited anywhere such as at the heater.
Ahh, that makes sense. Also, I should clarify - the checklist didn't call for it, but back in the day we used to plug in a power cart and run the Janitrol sort of like a mini-apu to preheat the cabin in the 411 before the pax arrived.

I'm again confused by this though: "I suppose if one engine quits and then starts dribbling fuel it could get ignited anywhere such as at the heater."

Huh?
bcrosier is offline  
Old 06-25-2012, 10:15 AM
  #13  
Moderator
 
Cubdriver's Avatar
 
Joined APC: May 2006
Position: ATP, CFI etc.
Posts: 6,056
Default

A running engine isn't going to drip as much but I guess it could. Would probably catch on fire all by itself if that happens. Any fuel leak is a fire hazard obviously. I do not think I would preheat a light twin cabin using a Janitrol like that, but if you did it then it must have worked out ok.
Cubdriver is offline  
Old 06-25-2012, 10:17 AM
  #14  
Gets Weekends Off
 
Joined APC: Sep 2008
Position: The Far Side
Posts: 968
Default

I've not known of one (or a Southwind, for that matter) to be wired through, say, and oil pressure switch. They'd all fire up with just the master on, if that's what you wanted. This is on Seneca IIs, PA30s, and Aztecs (and one Jeep). Overall I found them very reliable.

Goodman now owns the Janitrol name; there's no mention of it on their website that I can find. Stewart-Warner still mentions combustion heaters; OP might contact them for a manual. The Southwind operated similarly to the Janitrol, IIRC.
rotorhead1026 is offline  
Old 06-25-2012, 10:24 AM
  #15  
Gets Weekends Off
 
JamesNoBrakes's Avatar
 
Joined APC: Nov 2011
Position: Volleyball Player
Posts: 3,982
Default

There's the electric fan that's part of it, not sure if it matters.
JamesNoBrakes is offline  
Old 06-25-2012, 03:31 PM
  #16  
Eats shoots and leaves...
 
bcrosier's Avatar
 
Joined APC: Apr 2007
Position: Didactic Synthetic Aviation Experience Provider
Posts: 849
Default

Originally Posted by Cubdriver View Post
A running engine isn't going to drip as much but I guess it could. Would probably catch on fire all by itself if that happens. Any fuel leak is a fire hazard obviously. I do not think I would preheat a light twin cabin using a Janitrol like that, but if you did it then it must have worked out ok.
In retrospect I'm not certain it was the wisest thing to do, but it did work. Someone was always sitting in the a/c, so we did have that going for us, and functionally I don't think there's much difference between operating it in that fashion and doing so whist taxiing (no significant amount of ram air flow).
bcrosier is offline  
Old 06-25-2012, 06:49 PM
  #17  
New Hire
Thread Starter
 
Joined APC: Jul 2011
Posts: 2
Default

thanks to all of you; lot's of great info!
marinesteban is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Jack Bauer
Regional
100
10-27-2007 10:33 AM
LeoSV
Hangar Talk
1
07-22-2007 06:23 PM
HSLD
Hangar Talk
0
07-05-2007 02:15 PM
Squawk_5543
Regional
20
05-10-2007 08:44 AM
miker1369
Major
0
04-21-2006 03:38 PM

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



Your Privacy Choices