 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
cjaviator
Joined: 20 Aug 2014
Posts: 29
Location: New Zealand
|
 Posted: Wed Apr 06, 2016 4:44 pm Post subject: M-14 powered CJ CHT issues |
 |
|
Hi all.
New Zealand recently got her first CJ conversion to M-14 power and she goes like a dream apparently.The guys have been flying through our summer with barel acceptable CHT's (too low) but are concerned that as our relatively temperate winter comes on the CHT's will drop too low.
No cowl gills are fitted and they are wondering what is the best way to get the temps up to normal levels?
A Whirlwind prop with spinner is installed.
Any suggestions out there would be greatly appreciated.
Regards, Jay
New Zealand
| | - The Matronics Yak-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Yak-List |
|
|
|
| Back to top |
|
 |
richard.goode(at)russiana
Guest
|
| Posted: Thu Apr 07, 2016 12:10 am Post subject: M-14 powered CJ CHT issues |
|
|
The answer is very simple. Cylinder temperature on the M 14 P is very much a function of the suction jet size. This is a compensating jet and therefore the bigger the jet the less fuel gets into the engine. The original engine "spares kit" used to include some spare jets, but most have been lost now. These jets should be changed to control the temperature of the engine – indeed we recommend that they should be changed between summer and winter.
Changing the jet is very quick once the engine is exposed.
We have now put back into production these jets, and have a complete range from 1.1 mm up to 2.0 mm available.
Separately, we have been doing some research into the acceleration jet, which gives an extra little burst of fuel when the throttle is opened. We have established that almost all engines are fitted with a 1.2 mm acceleration jet, which we feel is, in most cases too large and therefore you get that typical "stumble" with some black smoke when the throttle is opened. We know that some operators simply block the jet, but then you are liable to get a weak mixture on opening the throttle, and a much more scientific procedure is to fit a smaller jet – like the suction jets it is very simple to change. So, we now manufacture acceleration jets in 0.6 and 0.9 millimetres sizes.
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Jay McIntyre
Sent: 07 April 2016 01:43
To: yak list
Subject: M-14 powered CJ CHT issues
Hi all.
New Zealand recently got her first CJ conversion to M-14 power and she goes like a dream apparently.
The guys have been flying through our summer with barel acceptable CHT's (too low) but are concerned that as our relatively temperate winter comes on the CHT's will drop too low.
No cowl gills are fitted and they are wondering what is the best way to get the temps up to normal levels?
A Whirlwind prop with spinner is installed.
Any suggestions out there would be greatly appreciated.
Regards, Jay
New Zealand
--
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.
| | - The Matronics Yak-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Yak-List |
|
|
|
| Back to top |
|
|
JL2A
Joined: 07 Apr 2015
Posts: 113
Location: Australia
|
| Posted: Fri Apr 08, 2016 5:22 pm Post subject: Re: M-14 powered CJ CHT issues |
|
|
How low is too low?
| | - The Matronics Yak-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Yak-List |
|
|
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
