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Monowheel Jacking

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NevEyre(at)aol.com
Guest

Posted: Fri Apr 14, 2006 7:15 am Post subject: Monowheel Jacking

Hi Jon,

Safe to hoist the plane up from the undercarriage frame, take the plenum  off 

if you have a 912, other wise, no problems.

Put padded saw horses under the wings, padded with pillows / cushions,  where 

the the spars are , in front of the outriggers, to check the roll, if you  

are going to get in for gear retraction.

Cheers,

Nev.

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hagargs(at)earthlink.net
Guest

Posted: Fri Apr 14, 2006 10:58 am Post subject: Monowheel Jacking

Jon:



I just did this about 3 weeks ago.  Attach an engine hoist just behind the 

engine like you mentioned.  I used a shackle and some nylon webbing.  Don't

worry about having a lot of weight suspened from a single point.  The plane

is not supposed to be heavy any way, right.   Don't try to support any

amount of weight with the wings and stands unless you have a very large

bearing surface to lay on.  Keep the weight off of the  wings and on the

engine mount. Just put some items under the wings to stop them from

rotating and having the wingtips hit the ground.  I was able to sit inside

and rotate the gear on the engine stand.  Have someone outside by the stand

while you are doing this. Depending on how far your boom is out the stand

might tend to rotate.  Adjust the  boom or have your buddy stand on the

hoist



Steve Hagar 

A143

Mesa, AZ



Steve Hagar

hagargs(at)earthlink.net

 	  Quote: 	
		   [Original Message]

 From: JonSmith <jon.smith680(at)tesco.net>

 Date: 4/14/2006 5:52:10 AM

 Subject: Monowheel Jacking



 



 Hi all, Sorry to "raise" this subject yet again - but I'd just like to

ask people's opinion...  
	


 	  Quote: 	
		   Is it considered safe practice to lift a fully rigged monowheel for the

retraction test/ inspection using a hoist?
	


 	  Quote: 	
		   In the past I've always messed around with jacks and trestles under the

wing spars which works fine, if a little precarious!  A friend though has a
	


hydraulic engine hoist which seems ideal and much easier - I was just

worried that there would be a lot of weight suspended from a single point

on the airframe.  

 	  Quote: 	
		   Where is the best place to attach the strap?  I've heard talk about using

the undercarriage mounting frame just behind the engine mounts??
	


 	  Quote: 	
		   If someone could reassure me - or otherwise - I'd be most grateful!

 Best Regards,

 Jon

 ----------------

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tony.bale(at)virgin.net
Guest

Posted: Sun Apr 16, 2006 2:17 pm Post subject: Monowheel Jacking

John,

            We have now raised '336' 3 times for various reasons, once with

a hoist and twice with a forklift. When using the hoist take care, the

aircraft will roll a long way forward when you lift it, it will also be

unstable and drop wings etc. We were fortunate to be building on a farm so

had access to a big forklift, this is much easier and cleaner if you have

the option. We found the hoist very restrictive, and easy to damage the

fuselage so protect it and the wings - however you may not have the option.



One word of caution (and this is very obvious in hindsight) - leave the

retraction tests as late as possible and dont work around the flap / gear

mechanism afterwards unless you have to. We simply fitted a small stowage

box in the rear luggage shelf and found out on the flight test it restricted

undercarriage dropping - and we had tested the gear 50+ times prior to

flight.



We lifted from the undercarriage / engine mount without problems, but if you

use a hoist remeber to add your weight to the aircrafts to make sure you

have sufficient capacity (aircraft weight circa 800 lb depending on build)

and get the longest arm possible.



ATB



Tony.



100 hours up and planning to fit the Airmaster, just preparing for the first

annual and working on the C of G mods (battery etc).

---

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