Today's Message Index:
----------------------
1. 12:44 AM - brake pressures (Mark Sandidge)
2. 03:16 AM - Re: Harley-powered airliners..... (Elwood140@aol.com)
3. 06:30 AM - Re: This is a Surprise (Don Walker)
4. 07:24 AM - Re: This is a Surprise (JNBOLDING1)
5. 08:08 AM - Re: Experimenting with prop pitch..... (Grant Corriveau)
6. 08:08 AM - Re: Experimenting with prop pitch..... (Grant Corriveau)
7. 08:08 AM - Re: Experimenting with prop pitch..... (Grant Corriveau)
8. 08:16 AM - Re: brake pressures (Don Honabach)
9. 10:22 AM - Re: This is a Surprise (CLOJAN@aol.com)
10. 10:37 AM - Re: Experimenting with prop pitch..... (caspainhower@aep.com)
11. 11:14 AM - Re: This is a Surprise (Doug Mendonca)
12. 12:17 PM - Re: Experimenting with prop pitch..... (Weston, Jim)
13. 08:12 PM - Re: Experimenting with prop pitch..... (JERICKSON03E@aol.com)
Message 1
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
05/30/2003 02:43:47 AM
--> Zenith-List message posted by: "Mark Sandidge" <MSandidge@peabodyenergy.com>
Regarding the thread on brake lines and pressures, before I ran my lines I
requested info from Matco. The following is their response. " The cylinders
are capable of pressures as high as 1500-2000 psi although a brake system
rarely needs more than 500 psi. The paraflex tubing we sell has a working
pressure of 450 psi and burst of 1800 psi. Something in that range should
be plenty. The pressure with intensifiers is 56% higher but the high end
operating range is still about 1500-2000 psi but with 500 psi being about
what is typically needed. The intersifiers are most commonly used where
pedal geometry is insufficient to produse 450 psi with a mild pedal force
(of about 50 pounds). If the brake geometry mechanical advantage is 2.5 to
1 or greater, there should be no need for the intensifiers." This was the
response from George Happ at Matco.
Hope this helps
Mark Sandidge
E-mail Disclaimer -----
The information contained in this e-mail, and in any accompanying documents,
may constitute confidential and/or legally privileged information. The
information is intended only for use by the designated recipient. If you are
not the intended recipient (or responsible for the delivery of the message to the
intended recipient), you are hereby notified that any dissemination,
distribution, copying, or other use of, or taking of any action in reliance on
this e-mail is strictly prohibited. If you have received this email
communication in error, please notify the sender immediately and delete the
message from your system.
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: Harley-powered airliners..... |
--> Zenith-List message posted by: Elwood140@aol.com
Yep, I can hear it now. A J3 that says 'potato, potato, potato' with an
eagle on the back.
Larry Wood
Do Not Archive
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: This is a Surprise |
--> Zenith-List message posted by: "Don Walker" <dwalk3dw@msn.com>
HOAX! The picture of the redrive is a Stratus and will not fit their set
up. Also the engine and mount looks a little silly. Don W
----- Original Message -----
From: "Scott Laughlin" <cookwithgas@hotmail.com>
Subject: Re: Zenith-List: This is a Surprise
> --> Zenith-List message posted by: "Scott Laughlin"
<cookwithgas@hotmail.com>
>
> Jeff:
>
> It all looks like a joke. If you look at it, there is a business address
> and phone number. That may be bogus. I still think the folks at ZAC
would
> say something about this if it is for real.
>
> Take care,
>
> Scott Laughlin
> www.cooknwithgas.com
>
>
> ----Original Message Follows----
> From: "Jeff Small" <zodiacjeff@msn.com>
> To: <zenith-list@matronics.com>
> Subject: Re: Zenith-List: This is a Surprise
> Date: Thu, 29 May 2003 17:56:21 -0400
>
> --> Zenith-List message posted by: "Jeff Small" <zodiacjeff@msn.com>
>
>
> >site advertising a company selling the Zodiac as a completed airplane to
> the
> >public. "Hog Air" with a Harley Davidson engine.
>
> >http://www.hog-air.com/
>
> >Maybe they are jumping the gun a little on the sport aircraft market.
> Will
> >Zenair allow this?
>
> If you want a surprise you should bring up the site and see a picture of
> your aircraft on it. Hog Air has no permission to use pictures of my a/c
> and I have no affiliation with this company.
>
> I have asked that the picture be removed. As other pictures on the site
are
> "stolen" from ZAC, you might want to check for yours.
>
> As the info - "A Zenith XL HD" what is an XL HD, and other items such as
> pictures of HDS wings, are inaccurate, perhaps this is a ruse.
>
> Regards Jeff
>
>
Message 4
| 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: This is a Surprise |
--> Zenith-List message posted by: "JNBOLDING1" <JNBOLDING1@mail.ev1.net>
>HOAX! The picture of the redrive is a Stratus and will not fit their set
>up. Also the engine and mount looks a little silly. Don W
>
>
>> It all looks like a joke. If you look at it, there is a business address
>> and phone number. That may be bogus. I still think the folks at ZAC
>would
>> say something about this if it is for real.
>>
>> ://www.hog-air.com/
>>
>> >Maybe they are jumping the gun a little on the sport aircraft market.
>> Will
>> >Zenair allow this?
>>
>> If you want a surprise you should bring up the site and see a picture of
>> your aircraft on it. Hog Air has no permission to use pictures of my a/c
>> and I have no affiliation with this company.
>>
>> I have asked that the picture be removed. As other pictures on the site
>are
>> "stolen" from ZAC, you might want to check for yours.
>>
>> As the info - "A Zenith XL HD" what is an XL HD, and other items such as
>> pictures of HDS wings, are inaccurate, perhaps this is a ruse.
>>
>> Regards Jeff
>>
If it is not a real deal I'm disappointed, can you imagine the raw emotion if one
of the things flew over main street during Sturgis?? The sight of THOUSANDS
of Hog drivers peeing down both legs makes the hair on the back of my neck stand
up!! LOW&SLOW John
Message 5
| 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: Experimenting with prop pitch..... |
--> Zenith-List message posted by: Grant Corriveau <grantc@ca.inter.net>
>> Please excuse me if this is totally ridiculous but, could your prop be on
>> backwards?
>>
>>
>
> Good thought, but the thrust would be in the forward direction. (Reverse
> thrust)
> John W. Tarabocchia
At first I thought this was 'tongue-in-cheek' but actually with the Warp
Drive carbon fiber props (isn't that what you have?)... I suppose it is
possible to install the blades in the wrong direction... highly unlikely but
still something to check.
i.e. the curved (upper) surfaces should be facing forward and the flat
surfaces should be facing the pilot.
Message 6
| 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: Experimenting with prop pitch..... |
--> Zenith-List message posted by: Grant Corriveau <grantc@ca.inter.net>
> Subject: Re: Zenith-List: Experimenting with prop pitch.....
>
>> With the prop on backwards the thrust is still in the same direction but the
>> prop is much less efficient. The analogy is a wing flying inverted. We used
>> to install the prop backwards on u-control models to slow them down for new
>> flyers.
I have a 'left side goes down' (i.e. viewed from the pilot's seat) prop
because my CAM100 spins opposite to other engines.
I suppose it is possible with confusion between clockwise and
counterclockwise propellors, for a propellor to be installed backwards and
STILL run with the leading edges forward, if a 'normal' prop was installed
on my engine...
Anyways - if the leading edge is leading, and the curvy side is forwards,
then this not the problem.
;-) Grant
Message 7
| 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: Experimenting with prop pitch..... |
--> Zenith-List message posted by: Grant Corriveau <grantc@ca.inter.net>
> Subject: Zenith-List: Experimenting with prop pitch.....
>
> Any more comments or ideas would be greatly appreciated.
John,
Good data -- thanks for sharing... how accurate is your asi? Do you have an
exterior static port?
Have you calibrated/checked the vsi? I did have a leak in my vsi glass/face
at one point that was causing it to underread by about 300 fpm...
Grant
Message 8
| 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 |
|
--> Zenith-List message posted by: "Don Honabach" <don@pcperfect.com>
Thanks to everyone for your comments and help.
I talked with Matco this morning and decided to go ahead and just use
the Parker Paraflex tubing they typically provide. Since it has a
greater working pressure of 450 versus the 300 that ZAC supplied it
seems like a no brainer. Only issue is that the paraflex tubing is
stiffer and may be harder to run, but everything is open right now so
it's not a big deal. Might be different though if things were riveted.
I'm also considering ordering their intensifier, but having mixed
thoughts. Has any one done this and had good or bad results?
Sometimes I think it would be easier to just install the Flinstone's
system ;)
Regards,
Don
-----Original Message-----
From: Mark Sandidge [mailto:MSandidge@peabodyenergy.com]
Subject: Zenith-List: brake pressures
--> Zenith-List message posted by: "Mark Sandidge"
--> <MSandidge@peabodyenergy.com>
Regarding the thread on brake lines and pressures, before I ran my lines
I requested info from Matco. The following is their response. " The
cylinders are capable of pressures as high as 1500-2000 psi although a
brake system rarely needs more than 500 psi. The paraflex tubing we sell
has a working pressure of 450 psi and burst of 1800 psi. Something in
that range should be plenty. The pressure with intensifiers is 56%
higher but the high end operating range is still about 1500-2000 psi but
with 500 psi being about what is typically needed. The intersifiers are
most commonly used where pedal geometry is insufficient to produse 450
psi with a mild pedal force (of about 50 pounds). If the brake geometry
mechanical advantage is 2.5 to 1 or greater, there should be no need for
the intensifiers." This was the response from George Happ at Matco.
Hope this helps
Mark Sandidge
E-mail Disclaimer -----
The information contained in this e-mail, and in any accompanying
documents, may constitute confidential and/or legally privileged
information. The
information is intended only for use by the designated recipient. If
you are not the intended recipient (or responsible for the delivery of
the message to the
intended recipient), you are hereby notified that any dissemination,
distribution, copying, or other use of, or taking of any action in
reliance on this e-mail is strictly prohibited. If you have received
this email communication in error, please notify the sender immediately
and delete the message from your system.
direct advertising on the Matronics Forums.
Message 9
| 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: This is a Surprise |
--> Zenith-List message posted by: CLOJAN@aol.com
In a message dated 5/29/03 5:56:42 PM Eastern Daylight Time,
zodiacjeff@msn.com writes:
> As the info - "A Zenith XL HD" what is an XL HD,
In this case I think the HD stands for Harley davidson. If their harley
engines virbrate anything like the ones I have riden, the Zenith airframe is not
substantial enough to support it. jack
Message 10
| 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: Experimenting with prop pitch..... |
05/30/2003 01:36:20 PM
--> Zenith-List message posted by: caspainhower@aep.com
Does the Warp drive prop your using have the "constant speed platform"
option. I'm wondering what the opinion is of using ground adjustable warp
drive or Ivo props vs. using an in-flight electrically adjustable Ivo. I
will be installing a lyc O-235 for xcountry flying and want max cruise and
efficiency as well as climb and take-off performance. Is that asking too
much?
Craig S.
601 XL
This e-mail message and all attachments transmitted with it from the
Nuclear Generation Group of American Electric Power are for the sole
use of the intended recipient(s) and may contain confidential and
privileged information. Any unauthorized review, use, disclosure or
distribution is prohibited. If you are not the intended recipient, please
contact the sender by reply e-mail and destroy all copies of the original
message.
Message 11
| 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: | This is a Surprise |
--> Zenith-List message posted by: "Doug Mendonca" <doug@photorola.com>
Last year I corresponded with a guy in Sacramento, Ca. who was seriously
considering going into manufacturing after the Light Sport Aircraft
rules become law. He approached ZAC about it, who gently side-stepped
the question and basically said, "the consensus standards aren't
finalized yet, so at this point it's too early to comment on the
feasibility of small scale manufacturing even if the current designs
meet the consensus standard".
That's quite a revelation - they didn't immediately slam the door on
him, so it appears they are weighing their options. The way I see it,
ZAC could manufacture themselves, license companies such as AMD
(www.newplane.com), or continue to sell plans that could be built and
sold in the new category if the "consensus standard" is met.
Interesting times!
-d.
-----Original Message-----
From: Scott Laughlin [mailto:cookwithgas@hotmail.com]
Subject: Re: Zenith-List: This is a Surprise
--> Zenith-List message posted by: "Scott Laughlin"
<cookwithgas@hotmail.com>
Jeff:
It all looks like a joke. If you look at it, there is a business
address
and phone number. That may be bogus. I still think the folks at ZAC
would
say something about this if it is for real.
Take care,
Scott Laughlin
www.cooknwithgas.com
----Original Message Follows----
From: "Jeff Small" <zodiacjeff@msn.com>
Subject: Re: Zenith-List: This is a Surprise
--> Zenith-List message posted by: "Jeff Small" <zodiacjeff@msn.com>
>site advertising a company selling the Zodiac as a completed airplane
to
the
>public. "Hog Air" with a Harley Davidson engine.
>http://www.hog-air.com/
>Maybe they are jumping the gun a little on the sport aircraft market.
Will
>Zenair allow this?
If you want a surprise you should bring up the site and see a picture of
your aircraft on it. Hog Air has no permission to use pictures of my
a/c
and I have no affiliation with this company.
I have asked that the picture be removed. As other pictures on the site
are
"stolen" from ZAC, you might want to check for yours.
As the info - "A Zenith XL HD" what is an XL HD, and other items such as
pictures of HDS wings, are inaccurate, perhaps this is a ruse.
Regards Jeff
Message 12
| 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: | Experimenting with prop pitch..... |
--> Zenith-List message posted by: "Weston, Jim" <Jim.Weston@delta.com>
Ok, I've watched this thread for a while and I just can't help it, I've got to
put my two cents into the subject.
Actually, with a Warp Drive propeller and it's ability to spin the blades around
their torsional axis by 360 degrees and then tighten them down where ever you
like, you can set the blades to give either forward or reverse thrust. You
can do this with either the leading edge or the trailing edge of the blade striking
the air first. (i.e. you can set positive or negative pitch leading edge
forward, or flip them around 180 degrees and set positive or negative pitch
trailing edge forward.) There is only one of the four combinations that is efficient,
per the blade design.
My two cents worth. Anyone have change for a nickel?
Jim Weston
McDonough, Ga.
-----Original Message-----
From: Beckman, Rick [mailto:Rick.Beckman@atk.com]
Subject: RE: Zenith-List: Experimenting with prop pitch.....
--> Zenith-List message posted by: "Beckman, Rick" <Rick.Beckman@ATK.COM>
> Please excuse me if this is totally ridiculous but, could your prop be on
> backwards?
>
>
Good thought, but the thrust would be in the forward direction. (Reverse
thrust)
Sorry to burst a bubble, but the thrust would be in the same
direction. Think
of the pitch as the compass line on a DG. If you have a line across
90 to 180, the
reciprocal ( like turning the prop over) is still 180 to 90. Same
line, same pitch.
Rick XL
Message 13
| 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: Experimenting with prop pitch..... |
--> Zenith-List message posted by: JERICKSON03E@aol.com
In a message dated 5/30/2003 2:18:21 PM Central Daylight Time,
Jim.Weston@delta.com writes:
>
> Ok, I've watched this thread for a while and I just can't help it, I've got
> to put my two cents into the subject.
>
> Actually, with a Warp Drive propeller and it's ability to spin the blades
> around their torsional axis by 360 degrees and then tighten them down where
> ever you like, you can set the blades to give either forward or reverse thrust.
> You can do this with either the leading edge or the trailing edge of the
> blade striking the air first. (i.e. you can set positive or negative pitch
> leading edge forward, or flip them around 180 degrees and set positive or
> negative pitch trailing edge forward.) There is only one of the four combinations
> that is efficient, per the blade design.
>
>
Good comments to think about. There is a point to it, as made above.
In prop talk, the FACE of the prop is the surface you should see from the
tail of the airplane. The flat surface. It is the same case for tractor and
pusher installations, and RH or LH engine rotation.
Leading and trailing edges are different for RH or LH rotation.
Inspection is the most frequent maintenance action, so we should be careful
to know what we are inspecting for. Use the tech data, always.
As noted above, blades can be set incorrectly in some prop set ups. And other
props can be installed backwards. Be careful.
Jerry Erickson
701SP
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! --
|