Today's Message Index:
----------------------
1. 07:32 AM - Re: MTW/OSH 2005 (Herb Coussons)
2. 07:46 AM - Re: polar inertia (Brian Lloyd)
3. 07:48 AM - Re: polar inertia (Brian Lloyd)
4. 08:02 AM - MTW/OSH and Catherding (Duncan aka Russ)
5. 09:12 AM - Yak Air Bottles (Roger Baker)
6. 09:31 AM - Re: Yak Air Bottles (Dee L. Conger)
7. 09:58 AM - Starter (Herb Coussons)
8. 11:14 AM - Re: Yak Air Bottles (Roger Doc Kemp)
9. 11:30 AM - Re: MTW/OSH and Catherding (Roger Doc Kemp)
10. 02:21 PM - Engine Monitoring Systems - JPI will be building a 9 cylinder EDM 930 (Charlie Lynch)
11. 03:03 PM - Re: Engine Monitoring Systems - JPI will be building a (Brian Lloyd)
12. 03:09 PM - Re: Engine Monitoring Systems - JPI will be building a (Brian Lloyd)
13. 03:31 PM - Re: Yak Air Bottles (Dee L. Conger)
14. 03:34 PM - Re: Engine Monitoring Systems - JPI will be building a 9 cylinder EDM 930 (Dee L. Conger)
15. 03:35 PM - Re: Engine Monitoring Systems - JPI will be building a 9 cylinder EDM 930 (Dee L. Conger)
16. 04:07 PM - Re: Engine Monitoring Systems - JPI will be building a (DaBear)
17. 04:23 PM - Re: Engine Monitoring Systems - JPI will be building a (DaBear)
18. 05:07 PM - Re: Engine Monitoring Systems - JPI will be building a (Brian Lloyd)
19. 05:09 PM - Re: Engine Monitoring Systems - JPI will be building a (Brian Lloyd)
Message 1
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| Subject: | Re: MTW/OSH 2005 |
--> Yak-List message posted by: Herb Coussons <drc@wscare.com>
Russ I will forward the email registration to you - everyone use it
and Russ will have all the info he needs
Herb
On May 25, 2005, at 12:33 PM, Duncan aka Russ wrote:
> --> Yak-List message posted by: "Duncan aka Russ"
> <Duncan1574@ExecPc.com>
>
> RPAers who will be attending MTW/OSH 2005.
>
> Please send me the following information ASAP.
>
> Aircraft type CJ/YAK5x/L29/L39/Marchetti/etc
> Number in party 1/2
> Coming to MTW in formation ? # of a/c in flight, possible flight
> callsign
> Tee-shirt size(s) (just a possibility @ this point but probable
> based on
> quantities desired)
>
>
> Russ "Air Boss" Witte-Dycus
> North Central Event Coordinator
> Red Star Pilot's Association
> http://www.flyredstar.org
>
>
Message 2
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| Subject: | Re: polar inertia |
--> Yak-List message posted by: Brian Lloyd <brian-yak@lloyd.com>
HodgeJW@aol.com wrote:
> --> Yak-List message posted by: HodgeJW@aol.com
>
> Hey Guys,
>
> Anybody here know anything about polar inertia?
yes. This topic has been discussed here several times. You might want to check
the archives for 'polar moment of inertia'.
I brought this subject up with Bushi Cheng, the aircraft's designer about 5
years ago when he was at OSH from China. He said that there is sufficient
margin of authority to accommodate the weight in the tail as opposed to in the
radio rack and that the aircraft will continue to be recoverable from a spin
even at full aft CG with the weight placed in the tail cone.
The long and short of it is:
"Don't worry, be happy."
--
Brian Lloyd 6501 Red Hook Plaza
brian-yak@lloyd.com Suite 201
http://www.lloyd.com St. Thomas, VI 00802
+1.340.998.9447 (voice) +1.270.912.0788 (fax)
I fly because it releases my mind from the tyranny of petty things . . .
- Antoine de Saint-Exupery
Message 3
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| Subject: | Re: polar inertia |
--> Yak-List message posted by: Brian Lloyd <brian-yak@lloyd.com>
Never mind. My mail program served up an old message and made me think it was
new. Sorry.
--
Brian Lloyd 6501 Red Hook Plaza
brian-yak@lloyd.com Suite 201
http://www.lloyd.com St. Thomas, VI 00802
+1.340.998.9447 (voice) +1.270.912.0788 (fax)
I fly because it releases my mind from the tyranny of petty things . . .
- Antoine de Saint-Exupery
Message 4
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| Subject: | MTW/OSH and Catherding |
--> Yak-List message posted by: "Duncan aka Russ" <Duncan1574@ExecPc.com>
RPAers, How is it that there are only six people registered on the events
calendar, yet I just counted 10 of you coming to MTW?
::walksawaymumblingsomethingaboutEDScommericalaboutcatherding::
Russ "Air Boss" Witte-Dycus
North Central Event Coordinator and Cat Herder
Red Star Pilot's Association
http://www.flyredstar.org
p.s. http://www.visit4info.com/details.cfm?adid=13938
also, checkout the airplane ad, very amusing
Message 5
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--> Yak-List message posted by: Roger Baker <f4ffm2@adelphia.net>
On the subject of air pressure containment vessels (air bottles) for
Yaks: I have been researching replacement bottles for Yaks for several
weeks now. Jerry Kummer and I are just about ready to see if there are
people in the Yak community that want to get (and stock) some of these
tanks...as it doesn't make economic sense to build less than about 20
units.
What we have worked on so far is a tank that will be a direct "bolt in"
replacement for the Yak 52 main system tank...of stainless steel, stock
size and configuration, hydrostatically checked. We've also looked
into carbon fiber wrapped vessels of non standard configuration. It is
possible to have either type bottle built here in SoCal. We haven't
got final cost figures from everybody involved, but as soon as we do,
I'll make a posting here on the site about it.
At this point, I think that replacement tanks can be made for near the
figure for which stock OEM tanks (if you can find one...I only know of
one here in the US) were selling. I'll need several committments from
the Yak community (after we get full costing info) before proceeding
with the manufacturing.
Stand by for more info here on the yak list.
Roger Baker
Message 6
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--> Yak-List message posted by: "Dee L. Conger" <dee@ansatainc.com>
What is the ballpark price for your tanks? I have no idea what the OEM
replacement costs.
Dee L. Conger
(858) 754-3010 Direct
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Roger Baker
Subject: Yak-List: Yak Air Bottles
--> Yak-List message posted by: Roger Baker <f4ffm2@adelphia.net>
On the subject of air pressure containment vessels (air bottles) for
Yaks: I have been researching replacement bottles for Yaks for several
weeks now. Jerry Kummer and I are just about ready to see if there are
people in the Yak community that want to get (and stock) some of these
tanks...as it doesn't make economic sense to build less than about 20
units.
What we have worked on so far is a tank that will be a direct "bolt in"
replacement for the Yak 52 main system tank...of stainless steel, stock
size and configuration, hydrostatically checked. We've also looked
into carbon fiber wrapped vessels of non standard configuration. It is
possible to have either type bottle built here in SoCal. We haven't
got final cost figures from everybody involved, but as soon as we do,
I'll make a posting here on the site about it.
At this point, I think that replacement tanks can be made for near the
figure for which stock OEM tanks (if you can find one...I only know of
one here in the US) were selling. I'll need several committments from
the Yak community (after we get full costing info) before proceeding
with the manufacturing.
Stand by for more info here on the yak list.
Roger Baker
Message 7
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--> Yak-List message posted by: Herb Coussons <drc@wscare.com>
Guys,
I have a new in box lightweight starter - the same as put on the TW
by George Coy - I do not need it and would sell it to anyone who may
want or need it for about 15% less than new.
If interested call or email
Herb
920-639-8434
Message 8
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--> Yak-List message posted by: "Roger Doc Kemp" <viperdoc@mindspring.com>
Are you doing the round bottles or is it the modified scuba tank that I saw
on the websit? What's that going to do for wieght and balance?
Doc
> [Original Message]
> From: Roger Baker <f4ffm2@adelphia.net>
> To: <yak-list@matronics.com>
> Date: 5/26/2005 11:09:43 AM
> Subject: Yak-List: Yak Air Bottles
>
> --> Yak-List message posted by: Roger Baker <f4ffm2@adelphia.net>
>
> On the subject of air pressure containment vessels (air bottles) for
> Yaks: I have been researching replacement bottles for Yaks for several
> weeks now. Jerry Kummer and I are just about ready to see if there are
> people in the Yak community that want to get (and stock) some of these
> tanks...as it doesn't make economic sense to build less than about 20
> units.
>
> What we have worked on so far is a tank that will be a direct "bolt in"
> replacement for the Yak 52 main system tank...of stainless steel, stock
> size and configuration, hydrostatically checked. We've also looked
> into carbon fiber wrapped vessels of non standard configuration. It is
> possible to have either type bottle built here in SoCal. We haven't
> got final cost figures from everybody involved, but as soon as we do,
> I'll make a posting here on the site about it.
>
> At this point, I think that replacement tanks can be made for near the
> figure for which stock OEM tanks (if you can find one...I only know of
> one here in the US) were selling. I'll need several committments from
> the Yak community (after we get full costing info) before proceeding
> with the manufacturing.
>
> Stand by for more info here on the yak list.
>
> Roger Baker
>
>
Message 9
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| Subject: | MTW/OSH and Catherding |
--> Yak-List message posted by: "Roger Doc Kemp" <viperdoc@mindspring.com>
Like ya said man..you be da "cat herder".
Doc
> [Original Message]
> From: Duncan aka Russ <Duncan1574@ExecPc.com>
> To: RPA <yak-list@matronics.com>
> Date: 5/26/2005 9:59:17 AM
> Subject: Yak-List: MTW/OSH and Catherding
>
> --> Yak-List message posted by: "Duncan aka Russ" <Duncan1574@ExecPc.com>
>
> RPAers, How is it that there are only six people registered on the
events
> calendar, yet I just counted 10 of you coming to MTW?
> ::walksawaymumblingsomethingaboutEDScommericalaboutcatherding::
>
> Russ "Air Boss" Witte-Dycus
> North Central Event Coordinator and Cat Herder
> Red Star Pilot's Association
> http://www.flyredstar.org
>
> p.s. http://www.visit4info.com/details.cfm?adid=13938
>
> also, checkout the airplane ad, very amusing
>
>
Message 10
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| Subject: | Engine Monitoring Systems - JPI will be building a 9 cylinder |
EDM 930
--> Yak-List message posted by: "Charlie Lynch" <lynch@netjets.com>
I have spoken with several RPA members about the different next
generation engine monitoring systems from vendors such as Blue Mountain,
Dynon, E.I., JPI, etc. The first two vendors have really great EMS type
systems but no one has a 9 cylinder unit. I called the people at Dynon,
but they could not even speculate about building a 9 cylinder unit.
JPI has a really interesting unit called the EDM 930. It has all kinds
of amazing features. I sent them a note yesterday asking if they would
be building a 9 cylinder unit and explained that in our group only there
are a large number of 9 cylinder radial engines. I received the
following reply.
Hi Charlie,
The EDM 930 we carry now, does not work with 9 Cyl engines, but after
passing on your email to the owner of the company he will now have our
team of engineers work on building an EDM 930 for radial engines.
It will be specially designed for 9 cylinder engines. The engineers are
working on it as we speak.
Best regards,
Dennis N.
This is really exciting news for those who want a next generation system
to let them know what is going on inside more than one of their
cylinders. The link to the current EDM 930 page is here:
http://www.jpinstruments.com/edm_930.html
Charlie
**********
This message contains information which may be confidential and privileged. Unless
you are the addressee (or authorized to receive for the addressee), you may
not use, copy or disclose to anyone the message or any information contained
in the message. If you have received the message in error, please advise the
sender by reply e-mail and delete the message.
Message 11
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| Subject: | Re: Engine Monitoring Systems - JPI will be building a |
9 cylinder EDM 930
--> Yak-List message posted by: Brian Lloyd <brian-yak@lloyd.com>
Charlie Lynch wrote:
> --> Yak-List message posted by: "Charlie Lynch" <lynch@netjets.com>
>
>
> I have spoken with several RPA members about the different next
> generation engine monitoring systems from vendors such as Blue Mountain,
> Dynon, E.I., JPI, etc. The first two vendors have really great EMS type
> systems but no one has a 9 cylinder unit. I called the people at Dynon,
> but they could not even speculate about building a 9 cylinder unit.
I spoke with Blue Mountain and they can easily do 9 cylinders as they have
enough A:D channels in their equipment and can add more if necessary. This is
the direction I am planning to go with my project.
One of the things to consider is that you really don't need 9 channels of EGT
with a radial since the mixture distribution is very even. You aren't really
going to have a "leanest cylinder". You can get away with a single EGT probe
just fine. 9xEGT becomes useful only for troubleshooting. But if you have the
channels, that is probably worthwhile.
But 9xCHT is very useful (IMHO).
--
Brian Lloyd 6501 Red Hook Plaza
brian-yak@lloyd.com Suite 201
http://www.lloyd.com St. Thomas, VI 00802
+1.340.998.9447 (voice) +1.270.912.0788 (fax)
I fly because it releases my mind from the tyranny of petty things . . .
- Antoine de Saint-Exupery
Message 12
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| Subject: | Re: Engine Monitoring Systems - JPI will be building a |
9 cylinder EDM 930
--> Yak-List message posted by: Brian Lloyd <brian-yak@lloyd.com>
There are some other issues to consider in engine instrumentation systems for
our aircraft.
One other issue is monitoring both inlet and outlet oil temperature. I doubt
whether any of the "standard" engine monitors will deal with that. That is
another reason for choosing Blue Mountain; you can add channels and then label
them. Also they seem receptive to making changes for specific uses. That is
the beauty of dealing with a smaller vendor.
--
Brian Lloyd 6501 Red Hook Plaza
brian-yak@lloyd.com Suite 201
http://www.lloyd.com St. Thomas, VI 00802
+1.340.998.9447 (voice) +1.270.912.0788 (fax)
I fly because it releases my mind from the tyranny of petty things . . .
- Antoine de Saint-Exupery
Message 13
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--> Yak-List message posted by: "Dee L. Conger" <dee@ansatainc.com>
I'm looking at a 500ci carbon fiber-wrapped cylinder that is much
smaller than a scuba tank - weights 6 lbs, about the same as the stock
unit and is good to 3000PSI. Shouldn't have any effect on weight /
balance. If it works, I'll post specifics on the site.
Dee L. Conger
(858) 754-3010 Direct
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Roger Doc Kemp
Subject: RE: Yak-List: Yak Air Bottles
--> Yak-List message posted by: "Roger Doc Kemp"
<viperdoc@mindspring.com>
Are you doing the round bottles or is it the modified scuba tank that I
saw
on the websit? What's that going to do for wieght and balance?
Doc
> [Original Message]
> From: Roger Baker <f4ffm2@adelphia.net>
> To: <yak-list@matronics.com>
> Date: 5/26/2005 11:09:43 AM
> Subject: Yak-List: Yak Air Bottles
>
> --> Yak-List message posted by: Roger Baker <f4ffm2@adelphia.net>
>
> On the subject of air pressure containment vessels (air bottles) for
> Yaks: I have been researching replacement bottles for Yaks for
several
> weeks now. Jerry Kummer and I are just about ready to see if there
are
> people in the Yak community that want to get (and stock) some of these
> tanks...as it doesn't make economic sense to build less than about 20
> units.
>
> What we have worked on so far is a tank that will be a direct "bolt
in"
> replacement for the Yak 52 main system tank...of stainless steel,
stock
> size and configuration, hydrostatically checked. We've also looked
> into carbon fiber wrapped vessels of non standard configuration. It
is
> possible to have either type bottle built here in SoCal. We haven't
> got final cost figures from everybody involved, but as soon as we do,
> I'll make a posting here on the site about it.
>
> At this point, I think that replacement tanks can be made for near the
> figure for which stock OEM tanks (if you can find one...I only know of
> one here in the US) were selling. I'll need several committments from
> the Yak community (after we get full costing info) before proceeding
> with the manufacturing.
>
> Stand by for more info here on the yak list.
>
> Roger Baker
>
>
Message 14
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| Subject: | Engine Monitoring Systems - JPI will be building a 9 cylinder |
EDM 930
--> Yak-List message posted by: "Dee L. Conger" <dee@ansatainc.com>
I agree - in fact, I may not even install the 9 EGT probes since there
is no mixture to adjust!
Dee L. Conger
(858) 754-3010 Direct
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Brian Lloyd
Subject: Re: Yak-List: Engine Monitoring Systems - JPI will be building
a 9 cylinder EDM 930
--> Yak-List message posted by: Brian Lloyd <brian-yak@lloyd.com>
Charlie Lynch wrote:
> --> Yak-List message posted by: "Charlie Lynch" <lynch@netjets.com>
>
>
> I have spoken with several RPA members about the different next
> generation engine monitoring systems from vendors such as Blue
Mountain,
> Dynon, E.I., JPI, etc. The first two vendors have really great EMS
type
> systems but no one has a 9 cylinder unit. I called the people at
Dynon,
> but they could not even speculate about building a 9 cylinder unit.
I spoke with Blue Mountain and they can easily do 9 cylinders as they
have
enough A:D channels in their equipment and can add more if necessary.
This is
the direction I am planning to go with my project.
One of the things to consider is that you really don't need 9 channels
of EGT
with a radial since the mixture distribution is very even. You aren't
really
going to have a "leanest cylinder". You can get away with a single EGT
probe
just fine. 9xEGT becomes useful only for troubleshooting. But if you
have the
channels, that is probably worthwhile.
But 9xCHT is very useful (IMHO).
--
Brian Lloyd 6501 Red Hook Plaza
brian-yak@lloyd.com Suite 201
http://www.lloyd.com St. Thomas, VI 00802
+1.340.998.9447 (voice) +1.270.912.0788 (fax)
I fly because it releases my mind from the tyranny of petty things . . .
- Antoine de Saint-Exupery
Message 15
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| Subject: | Engine Monitoring Systems - JPI will be building a 9 cylinder |
EDM 930
--> Yak-List message posted by: "Dee L. Conger" <dee@ansatainc.com>
Charlie - I too spoke with the owner of JPI who assures me that this
will be a software update to their unit. I've already cut my panel in
my Yak 50 for the 930, and will post the results when I receive the
unit. Should be quite a nice unit if it all works.
Dee L. Conger
(858) 754-3010 Direct
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Charlie Lynch
Subject: Yak-List: Engine Monitoring Systems - JPI will be building a 9
cylinder EDM 930
--> Yak-List message posted by: "Charlie Lynch" <lynch@netjets.com>
I have spoken with several RPA members about the different next
generation engine monitoring systems from vendors such as Blue Mountain,
Dynon, E.I., JPI, etc. The first two vendors have really great EMS type
systems but no one has a 9 cylinder unit. I called the people at Dynon,
but they could not even speculate about building a 9 cylinder unit.
JPI has a really interesting unit called the EDM 930. It has all kinds
of amazing features. I sent them a note yesterday asking if they would
be building a 9 cylinder unit and explained that in our group only there
are a large number of 9 cylinder radial engines. I received the
following reply.
Hi Charlie,
The EDM 930 we carry now, does not work with 9 Cyl engines, but after
passing on your email to the owner of the company he will now have our
team of engineers work on building an EDM 930 for radial engines.
It will be specially designed for 9 cylinder engines. The engineers are
working on it as we speak.
Best regards,
Dennis N.
This is really exciting news for those who want a next generation system
to let them know what is going on inside more than one of their
cylinders. The link to the current EDM 930 page is here:
http://www.jpinstruments.com/edm_930.html
Charlie
**********
This message contains information which may be confidential and
privileged. Unless you are the addressee (or authorized to receive for
the addressee), you may not use, copy or disclose to anyone the message
or any information contained in the message. If you have received the
message in error, please advise the sender by reply e-mail and delete
the message.
Message 16
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| Subject: | Re: Engine Monitoring Systems - JPI will be building a |
9 cylinder EDM 930
--> Yak-List message posted by: DaBear <dabear@damned.org>
I'm looking at the Grand Rapids Technology engine monitor system. It is
also upgradeable to an EFIS and Moving map. I'm looking at it after
looking at the JPI, blue mountain, and others. When I spoke to the
folks at GRT, they told me that their unit will do 9 EGT and 6 CHT,
however if I want, they'll do a software mod and do 9 CHT and 3 EGT
(they are limited by inputs). I like their system after talking with
the folks there.
Al
Dee L. Conger wrote:
>--> Yak-List message posted by: "Dee L. Conger" <dee@ansatainc.com>
>
>I agree - in fact, I may not even install the 9 EGT probes since there
>is no mixture to adjust!
>
>Dee L. Conger
>(858) 754-3010 Direct
>
>-----Original Message-----
>From: owner-yak-list-server@matronics.com
>[mailto:owner-yak-list-server@matronics.com] On Behalf Of Brian Lloyd
>To: yak-list@matronics.com.9.cylinder.EDM.930
>Subject: Re: Yak-List: Engine Monitoring Systems - JPI will be building
>a 9 cylinder EDM 930
>
>--> Yak-List message posted by: Brian Lloyd <brian-yak@lloyd.com>
>
>Charlie Lynch wrote:
>
>
>>--> Yak-List message posted by: "Charlie Lynch" <lynch@netjets.com>
>>
>>
>>I have spoken with several RPA members about the different next
>>generation engine monitoring systems from vendors such as Blue
>>
>>
>Mountain,
>
>
>>Dynon, E.I., JPI, etc. The first two vendors have really great EMS
>>
>>
>type
>
>
>>systems but no one has a 9 cylinder unit. I called the people at
>>
>>
>Dynon,
>
>
>>but they could not even speculate about building a 9 cylinder unit.
>>
>>
>
>I spoke with Blue Mountain and they can easily do 9 cylinders as they
>have
>enough A:D channels in their equipment and can add more if necessary.
>This is
>the direction I am planning to go with my project.
>
>One of the things to consider is that you really don't need 9 channels
>of EGT
>with a radial since the mixture distribution is very even. You aren't
>really
>going to have a "leanest cylinder". You can get away with a single EGT
>probe
>just fine. 9xEGT becomes useful only for troubleshooting. But if you
>have the
>channels, that is probably worthwhile.
>
>But 9xCHT is very useful (IMHO).
>
>
>
Message 17
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| Subject: | Re: Engine Monitoring Systems - JPI will be building a |
9 cylinder EDM 930
--> Yak-List message posted by: DaBear <dabear@damned.org>
Opps, I mean 9 CHT and 6 EGT. They said by putting in a switch they
could do the other 3 (EGT or CHT). But (I hate to do this in public) I
agree with Brian in that EGT is not of much value in an M14P since we
don't have a mixture control. Now, if we have 9 CHT, can we
troubleshoot the same as if we had 9 EGT? Or should I put in a switch?
Al
DaBear wrote:
>--> Yak-List message posted by: DaBear <dabear@damned.org>
>
>I'm looking at the Grand Rapids Technology engine monitor system. It is
>also upgradeable to an EFIS and Moving map. I'm looking at it after
>looking at the JPI, blue mountain, and others. When I spoke to the
>folks at GRT, they told me that their unit will do 9 EGT and 6 CHT,
>however if I want, they'll do a software mod and do 9 CHT and 3 EGT
>(they are limited by inputs). I like their system after talking with
>the folks there.
>
>Al
>
>Dee L. Conger wrote:
>
>
>
>>--> Yak-List message posted by: "Dee L. Conger" <dee@ansatainc.com>
>>
>>I agree - in fact, I may not even install the 9 EGT probes since there
>>is no mixture to adjust!
>>
>>Dee L. Conger
>>(858) 754-3010 Direct
>>
>>-----Original Message-----
>>From: owner-yak-list-server@matronics.com
>>[mailto:owner-yak-list-server@matronics.com] On Behalf Of Brian Lloyd
>>To: yak-list@matronics.com.9.cylinder.EDM.930
>>Subject: Re: Yak-List: Engine Monitoring Systems - JPI will be building
>>a 9 cylinder EDM 930
>>
>>--> Yak-List message posted by: Brian Lloyd <brian-yak@lloyd.com>
>>
>>Charlie Lynch wrote:
>>
>>
>>
>>
>>>--> Yak-List message posted by: "Charlie Lynch" <lynch@netjets.com>
>>>
>>>
>>>I have spoken with several RPA members about the different next
>>>generation engine monitoring systems from vendors such as Blue
>>>
>>>
>>>
>>>
>>Mountain,
>>
>>
>>
>>
>>>Dynon, E.I., JPI, etc. The first two vendors have really great EMS
>>>
>>>
>>>
>>>
>>type
>>
>>
>>
>>
>>>systems but no one has a 9 cylinder unit. I called the people at
>>>
>>>
>>>
>>>
>>Dynon,
>>
>>
>>
>>
>>>but they could not even speculate about building a 9 cylinder unit.
>>>
>>>
>>>
>>>
>>I spoke with Blue Mountain and they can easily do 9 cylinders as they
>>have
>>enough A:D channels in their equipment and can add more if necessary.
>>This is
>>the direction I am planning to go with my project.
>>
>>One of the things to consider is that you really don't need 9 channels
>>of EGT
>>with a radial since the mixture distribution is very even. You aren't
>>really
>>going to have a "leanest cylinder". You can get away with a single EGT
>>probe
>>just fine. 9xEGT becomes useful only for troubleshooting. But if you
>>have the
>>channels, that is probably worthwhile.
>>
>>But 9xCHT is very useful (IMHO).
>>
>>
>>
>>
>>
>
>
>
>
Message 18
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| Subject: | Re: Engine Monitoring Systems - JPI will be building a |
9 cylinder EDM 930
--> Yak-List message posted by: Brian Lloyd <brian-yak@lloyd.com>
DaBear wrote:
> --> Yak-List message posted by: DaBear <dabear@damned.org>
>
> I'm looking at the Grand Rapids Technology engine monitor system. It is
> also upgradeable to an EFIS and Moving map. I'm looking at it after
> looking at the JPI, blue mountain, and others. When I spoke to the
> folks at GRT, they told me that their unit will do 9 EGT and 6 CHT,
> however if I want, they'll do a software mod and do 9 CHT and 3 EGT
> (they are limited by inputs). I like their system after talking with
> the folks there.
And I wish these designers would make things that are more flexible. It is
annoying that they assume that there will only be 6 cylinders so they only
have 12 thermocouple inputs.
--
Brian Lloyd 6501 Red Hook Plaza
brian-yak@lloyd.com Suite 201
http://www.lloyd.com St. Thomas, VI 00802
+1.340.998.9447 (voice) +1.270.912.0788 (fax)
I fly because it releases my mind from the tyranny of petty things . . .
- Antoine de Saint-Exupery
Message 19
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| Subject: | Re: Engine Monitoring Systems - JPI will be building a |
9 cylinder EDM 930
--> Yak-List message posted by: Brian Lloyd <brian-yak@lloyd.com>
DaBear wrote:
> --> Yak-List message posted by: DaBear <dabear@damned.org>
>
> Opps, I mean 9 CHT and 6 EGT.
No, you had it right the first time. They have 12 thermocouple channels and if
you use 9 for EGT you have only 3 for CHT and vice versa.
> They said by putting in a switch they
> could do the other 3 (EGT or CHT).
I think they were using the switch to get you three more or six of one or the
other.
> But (I hate to do this in public) I
> agree with Brian in that EGT is not of much value in an M14P since we
> don't have a mixture control. Now, if we have 9 CHT, can we
> troubleshoot the same as if we had 9 EGT? Or should I put in a switch?
As I indicated, with the M14P and the Huosai the mixture is uniform in all the
cylinders due to the mechanical mixing by the supercharger impeller so EGT per
cylinder doesn't help that much in normal operations. A single EGT will help
the Huosai driver set the mixture.
OTOH, if you are troubleshooting an EGT per cylinder can help you identify
various problems. A bad plug will show up as a suddenly high EGT in that
cylinder. Doing a mag check will let you find the exact plug that is having a
problem. All EGT going high can indicate a lost mag. Suddenly low EGT
accompanied by rising CHT can indicate detonation.
So there is a reason to have EGT per cylinder. The thing is, you want to be
able to look at all of them all the time to be able to notice the problem.
I do wish that the newer engine monitors would try to do something smart
rather than try to emulate a bunch of steam gauges. Frankly, I don't want to
look at them in normal operation. And when you are flying on someone's wing
you can't look at the gauges anyway. It would be much better if the system was
smart enough to *tell* you when there is something wrong.
--
Brian Lloyd 6501 Red Hook Plaza
brian-yak@lloyd.com Suite 201
http://www.lloyd.com St. Thomas, VI 00802
+1.340.998.9447 (voice) +1.270.912.0788 (fax)
I fly because it releases my mind from the tyranny of petty things . . .
- Antoine de Saint-Exupery
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