If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
|
Thread Tools | Display Modes |
#11
|
|||
|
|||
Doug wrote: Works on my plane (a Husky with Constant Speed prop). If you can change your engine speed with the mixture then you have a governor problem. |
#12
|
|||
|
|||
Cory,
This is what I was concerned about, letting the CHT go over 400 without realising it, having no CHT installed. In cruise I am running less than 75% so this shouldn't be a problem. Instead of fitting an expensive engine monitor I may just purchase a digital CHT so I can see what's going on, however the panel space is pretty tight at present. Dean |
#13
|
|||
|
|||
Dean,
Instead of fitting an expensive engine monitor Expensive is relative here. The things are cheap compared to one (or, in your case, two) engine overhauls. -- Thomas Borchert (EDDH) |
#14
|
|||
|
|||
Dean,
but how do I know that that particular EGT is the highest reading. i.e. is it taken off an individual exhaust outlet or further down the exhaust (i.e. common/averaged reading). You don't. But again: You are not looking for the highest value in EGT. What you are looking for is the first cylinder to reach peak, regardless of the value it is at. The Deakin columns make all this clear (after a while...). The only way to make sure is to install a multi-probe EGT instrument. Actually, with your kind of engine, I would recommend having one. But, as long as you don't have one, using the one probe you have will put you in the ballpark. -- Thomas Borchert (EDDH) |
#15
|
|||
|
|||
Dean wrote:
: Cory, : This is what I was concerned about, letting the CHT go over 400 without : realising it, having no CHT installed. In cruise I am running less than : 75% so this shouldn't be a problem. Instead of fitting an expensive : engine monitor I may just purchase a digital CHT so I can see what's : going on, however the panel space is pretty tight at present. Like I was trying to say before, for simple, crude engines like the O-540, having a whole bunch of readouts probably won't do a whole lot of good. They'll be all over the map and not much you can do about it. That said, the first thing I did on my O-360 was install a CHT and EGT probe for each cylinder. I didn't buy an analyzer, just the Westach gauge and a switch. I ended up buying the "STC'd" kit, but in reality it's the same thing as the non-kit. In fact, the rotary switch they supply is pretty cheap and has already become a bit oxidized internally after 3 years. After switching, you have to wiggle it a bit to make sure you've got really good internal contact. I'd like to replace it with a better switch with internal gold-plated contacts. Depending on how cozy you are with your mechanic (and its corollary of how cozy he is with your local FSDO), I'd suggest something like this: http://www.westach.com/images/showca...HT_Pointer.jpg or maybe http://www.westach.com/images/showca...8-Dual_CHT.jpg or http://www.westach.com/images/showca...al_EGT-CHT.jpg to conserve panel space. A rotary switch (all that the STC kit has, anyway) can be wired in to select whichever jug you want to look at. That makes the primary cost simply that of the probes. Like I said, I put multiprobes on mine, but in reality I rarely switch. I found which one was hottest (right-rear, generally) and leave it on that. -Cory -- ************************************************** *********************** * Cory Papenfuss * * Electrical Engineering candidate Ph.D. graduate student * * Virginia Polytechnic Institute and State University * ************************************************** *********************** |
|
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Book Review:Maintenance/overhaul guide to Lycoming aircraft engines, Christy | Paul | Home Built | 11 | December 26th 04 03:24 AM |
Lycoming 0-360 factory overhaul core charges - Does Air Powertell the truth ? | Mike Spera | Owning | 6 | December 13th 04 01:13 AM |
Lycoming remote oil filter | Evan Carew | Home Built | 0 | November 5th 04 10:09 PM |
Leaning for taxi | Jim Rosinski | Piloting | 28 | September 12th 04 03:53 AM |
Lycoming Sued | jls | Home Built | 0 | February 13th 04 02:01 PM |