Today's Message Index:
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1. 01:17 AM - Re: [Non-DoD Source] Re: Cj6 lift off without jacks (Roger Kemp)
2. 02:42 PM - Harry Flood (Craig Payne)
3. 08:22 PM - Re: Harry Flood (Roger Kemp)
Message 1
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| Subject: | Re: Cj6 lift off without jacks |
Sent from my iPad
> On Aug 21, 2017, at 10:47 AM, Bitterlich, Mark G CIV NAVAIR, WD <mark.bitterlich@navy.mil>
wrote:
>
>
> I guess no one else is going to say it, so I might as well.
>
> Trying to get the landing gear to come down multiple times is perfectly acceptable.
Trying the same thing to get it to go up....... isn't.
>
> Mark
>
>
> -----Original Message-----
> From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Greg Wrobel
> Sent: Monday, August 21, 2017 11:31 AM
> To: yak-list@matronics.com
> Subject: [Non-DoD Source] Re: Yak-List: Cj6 lift off without jacks
>
> Sorry, somehow a partial message was sent. To continue......... I had two good
Jack's but the off sets were longer than necessary. I used a weighed tail stand
and with the gear down the aircraft tipped backwards and fell off the jacks.
Fortunately nothing was damaged. I have redesigned my Jacks, tail stand AND
added the nose stand. It's rock solid. If you have never experienced a gear
retraction and especially an emmergecy extension, it can be quite violent especially
if someone has removed the restrictors in your air lines over the years.
Get good jacks AND both stands!!!!!!!
>
> On Aug 21, 2017 10:07 AM, "Greg Wrobel" <clouddog22@gmail.com> wrote:
>
>
> Bruno, Please, Please, Please read everything everyone is telling you.
Jacking the CJ improperly can cause you more trouble and grief than you want
to experience!!! Things like the airplane falling off the jacks and going through
the wings, or raising the gear and having the Airplane fall off the jacks
ending up on the floor! My first experience was two good Jack's with
>
> On Aug 21, 2017 6:30 AM, "A. Dennis Savarese" <dsavarese0812@bellsouth.net>
wrote:
>
>
> There are 4 jacks needed to jack the CJ properly, and all 4 should
be used when jacking the airplane. Not 3...all 4. Nose, Tail and two wing
jacks. The wing jacks must allow for the gear doors to clear the jacks when
retracting the gear. Also the wing jacks must be designed to properly support
the aircraft because with the gear doors having to clear the jacks, there
will be an offset needed at the top of the jack to fit into the jack point socket
in the wing. That means the wing jack weight distribution is not directly
below the jack point. You definitely do not want the airplane "leaning" or
back on the wing jacks when the airplane is raised off the ground. Doug Sapp
probably has photos of both the original Chinese jacks or of the specialty jacks
he designed and sold for the CJ. You may be able duplicate them.
>
> The nose jack, which cradles the bottom of the engine around the
rocker box covers on cylinders 4, 5, 6, and 7, keeps the nose from tipping
over. The tail stand is also required because the CJ, unlike the Yak 52, is balanced
fore and aft at the wing jack points. (On the Yak 52, the jack points
are well aft of the main spar and thus well aft of the CG, making the Yak 52
extremely nose heavy) On the CJ, if you did not have the tail stand and were
to step onto the left wing to do a gear retraction test, the tail of the CJ
would immediately go right to the ground.
>
> My recommendation, and I concur 100% with what others have said,
is to invest in a PROPER set of jacks for the CJ. Don't be "penny wise and
pound foolish" because it can cause you a lot of grief if you use the wrong jacks.
> Dennis
>
>
>
>
>
> ________________________________
>
> From: Justin Drafts <draftsjust417@gmail.com>
> To: yak-list@matronics.com
> Sent: Monday, August 21, 2017 6:49 AM
> Subject: Re: Yak-List: Cj6 lift off without jacks
>
>
> Oh wow, I would find some good jacks and tail stand.
> This is what the engineers originally intended for lifting the
aircraft and properly distributing its weight. Anything else and I think you
would put the wrong bending stresses throughout the airframe. Better safe than
sorry.
> My thoughts...
> Justin
>
> On Aug 21, 2017 3:49 AM, "airmanv2" <bruno.blanchard2@gmail.com>
wrote:
>
>
>
> Hi every body,
> always with my gear retraction problem.
> Looking for advices to lift the cj6 without the special
jacks.
> is it ok to get a small crane and tide a rope to engine
mount, putting the back of the plane on a drum ???
> thank you for help
> Bruno
>
> --------
> Fly safe
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/ viewtopic.php?p=472026#472026 <http://forums.matronics.com/viewtopic.php?p=472026#472026>
>
>
>
>
>
>
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Message 2
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Do we have any 'listers hunkering down in the flood zone? I'm pulling for
you and hope all stay safe.
Craig Payne
Message 3
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Craig,
You pontoon kits for CJ's?
Doc
Sent from my iPad
> On Aug 27, 2017, at 4:40 PM, Craig Payne <yakman285@gmail.com> wrote:
>
> Do we have any 'listers hunkering down in the flood zone? I'm pulling for you
and hope all stay safe.
>
> Craig Payne
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