Today's Message Index:
----------------------
1. 01:17 PM - Re: YAK 52 jack point (Bill1200)
2. 03:50 PM - Re: Housai Valve Seats (Roger Bieberdorf)
3. 08:56 PM - Re: Housai Valve Seats (vectorwarbirds@AOL.COM)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: YAK 52 jack point |
One more question, I see there are actually 4 jack points, one on each wing and
2 at the nose wheel. Is it necessary to use all 4, or will 3 do?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=230014#230014
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Housai Valve Seats |
AUTO FUEL?--- Does it have alcohol or MBTE in it?- rb
--- On Wed, 2/11/09, vectorwarbirds@aol.com <vectorwarbirds@aol.com> wrote:
From: vectorwarbirds@aol.com <vectorwarbirds@aol.com>
Subject: Re: Yak-List: Housai Valve Seats
Just for everyones information we cut Housai and M14P valve seats all the t
ime, they are not hardened valve seats, just the opposite, they are easy to
cut and it takes no special tools that any master mechanic would not have
or be able to use.- They are three angle cuts and I suspect they are bron
ze or similar material.
Anyone who says they needed to dress the stone three times on those seats n
eeds new stones!
We also have been running auto fuel (87oct) for six years now (200hrs per y
ear) with no problems whatsoever.- I suspect most peoples problems arrise
from not correctly adjusting the valves out of laziness or not knowing how
.
Gary 'Bunndini' Bunn
Vector Warbirds USA
-----Original Message-----
From: Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E <mark.bitterlich
@navy.mil>
Sent: Wed, 11 Feb 2009 1:59 pm
Subject: RE: Yak-List: Housai Valve Seats
MALS-14 64E" <mark.bitterlich@navy.mil>
Graeme, with respect, this is a subject that I feel is unwise to dismiss
based on what your friend said when he ground the valve seats in your
engine.
1. Unless those seats were made to the exact same specs, you also can
not be sure of anything that applies to an engine made in another
country, I.E. a Housai compared to an M-14.
2. Not only is the hardness of the seat material massively different at
grinding temperatures as compared to combustion temperatures, but the
valve material (as well as the valve seats) comes into play.
Valve seats are a science unto themselves. For an interesting discourse
on the subject, read this:
http://www.patentstorm.us/patents/7216427/description.html
Bottom line. If you want to run 100% unleaded fuel in these engines for
a long period of time with no additives, and not be concerned about it
at all, that is clearly your choice.
Personally, I tend to side with every technical article written on the
subject.
Mark Bitterlich
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Graeme Frew
Sent: Wednesday, February 11, 2009 3:24 PM
Subject: Yak-List: Housai Valve Seats
Guys I am sure this will apply to the Russian engine as well. About 5
years ago I had cause to have some valves reground on my Housai engine.
A guy who builds race engines made some tooling and cut the seats for
me. He said they were the hardest valve seats he had ever seen and had
to dress the stone three times per angle he cut in the seat. I figure
your lower or no lead fuel will work fine in these engines though your
mileage may vary.
Graeme Frew
ex Nanchang
=0A=0A=0A
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Housai Valve Seats |
We have run up to 5% ethanol in our mogas, but most gas up here in Prescott is
free of ethanol and no MBTE.? It has no effect on any CJ rubber or the diaphragm
as we have run long term submersion tests on all.?
Bunndini
-----Original Message-----
From: Roger Bieberdorf <rogerbyak@yahoo.com>
Sent: Thu, 12 Feb 2009 4:49 pm
Subject: Re: Yak-List: Housai Valve Seats
AUTO FUEL???? Does it have alcohol or MBTE in it?? rb
--- On Wed, 2/11/09, vectorwarbirds@aol.com <vectorwarbirds@aol.com> wrote:
From: vectorwarbirds@aol.com <vectorwarbirds@aol.com>
Subject: Re: Yak-List: Housai Valve Seats
Just for everyones information we cut Housai and M14P valve seats all the time,
they are not hardened valve seats, just the opposite, they are easy to cut and
it takes no special tools that any master mechanic would not have or be able
to use.? They are three angle cuts and I suspect they are bronze or similar material.
Anyone who says they needed to dress the stone three times on those seats needs
new stones!
We also have been running auto fuel (87oct) for six years now (200hrs per year)
with no problems whatsoever.? I suspect most peoples problems arrise from not
correctly adjusting the valves out of laziness or not knowing how.
Gary 'Bunndini' Bunn
Vector Warbirds USA
-----Original Message-----
From: Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E <mark.bitterlich@navy.mil>
Sent: Wed, 11 Feb 2009 1:59 pm
Subject: RE: Yak-List: Housai Valve Seats
MALS-14 64E" <mark.bitterlich@navy.mil>
Graeme, with respect, this is a subject that I feel is unwise to dismiss
based on what your friend said when he ground the valve seats in your
engine.
1. Unless those seats were made to the exact same specs, you also can
not be sure of anything that applies to an engine made in another
country, I.E. a Housai compared to an M-14.
2. Not only is the hardness of the seat material massively different at
grinding temperatures as compared to combustion temperatures, but the
valve material (as well as the valve seats) comes into play.
Valve seats are a science unto themselves. For an interesting discourse
on the subject, read this:
http://www.patentstorm.us/patents/7216427/description.html
Bottom line. If you want to run 100% unleaded fuel in these engines for
a long period of time with no additives, and not be concerned about it
at all, that is clearly your choice.
Personally, I tend to side with every technical article written on the
subject.
Mark Bitterlich
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Graeme Frew
Sent: Wednesday, February 11, 2009 3:24 PM
Subject: Yak-List: Housai Valve Seats
Guys I am sure this will apply to the Russian engine as well. About 5
years ago I had cause to have some valves reground on my Housai engine.
A guy who builds race engines made some tooling and cut the seats for
me. He said they were the hardest valve seats he had ever seen and had
to dress the stone three times per angle he cut in the seat. I figure
your lower or no lead fuel will work fine in these engines though your
mileage may vary.
Graeme Frew
ex Nanchang
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|