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Harmon Rocket HR-2 jack points

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mark936(at)webtv.net
Guest

Posted: Mon Jul 16, 2007 10:51 am Post subject: Harmon Rocket HR-2 jack points

how are you guys lifting or jacking your planes up for tire changes?



I got ready to use a wing jack on the tie down point and John Harmon

shot that down,  said aft of CG and 3/16th bolts.



Lots of RV TW guys are using wing jacks and jacking plane off ground

albeit lighter by two hundred pounds.



I didn't want to stress it by lifting it by the engine mount .  



Just curious about different methods.



thx

jhstarn(at)verizon.net
Guest

Posted: Mon Jul 16, 2007 11:37 am Post subject: Harmon Rocket HR-2 jack points

We had some 1/2 thick aluminum scrap and a piece of angle. Cut a 2" hole in the 6" round piece so it kinda looks like a fat horse shoe. Drilled holes in the open end & used a 3/4 angle to close the opening buy installing two bolts. The open end is wide enough to slip onto the gear leg. The angle hits the bottom "thru bolt" and the horse shoe solid end rests on the gear leg. The hole is such that when installed it is level with the ground, we then just put a floor jack under the large part of the horseshoe end (facing inside) & jack it up. We have 2X4" cut & screwed together & rest the axle on them once the wheel is removed......Guess I have to take some photos of our "tools".   KABONG

 	  Quote: 	
		  From: mark936(at)webtv.net

Date: 2007/07/16 Mon PM 01:50:38 CDT

To: rocket-list(at)matronics.com

Subject: Re: Harmon Rocket HR-2 jack points

 	  Quote: 	

how are you guys lifting or jacking your planes up for tire changes?

I got ready to use a wing jack on the tie down point and John Harmon

shot that down,  said aft of CG and 3/16th bolts.

Lots of RV TW guys are using wing jacks and jacking plane off ground

albeit lighter by two hundred pounds.

I didn't want to stress it by lifting it by the engine mount .

Just curious about different methods.

thx

lschneider39(at)cox.net
Guest

Posted: Mon Jul 16, 2007 11:58 am Post subject: Harmon Rocket HR-2 jack points

What would John think of doing one wheel at a time using wing jacks? It 

leaves the CG more neutral with one wheel left on the ground and low fuel. 

Larry



---

mark936(at)webtv.net
Guest

Posted: Mon Jul 16, 2007 1:30 pm Post subject: Harmon Rocket HR-2 jack points

john likes to lift with straps on engine mount but I heard somewhere

that you could do possible damage.  So I was looking for jacks.



we have a gizmo like Kabong mentioned but with 10 inches of chain for

one wheel/leg at a time.



I heard that a hoist on the engine for AFT problems along with the wing

jacks works well since there are six bolts in there.



I'll probably do the hoist either on the engine with straps or leg gear

after Harry H. finishes with the cherry picker on the field.  And I'm

not there so I won't have much say so.  It will just get done.



I have full fuel in the wing.



Thanks for input.  (you know how hard it was getting those unused three

legged jacks in the C-182 from a RV friend at Compton?)  



and I'll still have to buy him a bottle of wine.

SSmith(at)lacsd.org
Guest

Posted: Mon Jul 16, 2007 2:00 pm Post subject: Harmon Rocket HR-2 jack points

Hey Mark:



	Thanks for the feedback and information - I will be very careful if I decide to lift from the engine mount again!!   Lifting with straps around the engine sounds like a real good idea - Stu.



--

fairlea(at)amtelecom.net
Guest

Posted: Mon Jul 16, 2007 2:03 pm Post subject: Harmon Rocket HR-2 jack points

Take a standard gear clamp, or two if you are nervous, and put them on the

lower gear leg socket.  Around where the bolt goes through the leg. Place

them so that the "screw" portion is facing down.  The provides a lip that a

standard floor jack can grip on to.  I, and others, have used this method

for years.  Have some blocks ready to put under the axle after the wheel is

removed so that you can take the weight off the jack while you work on the

tire.  Make sure you chock the other wheel.



Tom Martin



--

walter(at)tondu.com
Guest

Posted: Mon Jul 16, 2007 5:55 pm Post subject: Harmon Rocket HR-2 jack points

On 07/16  2:28, mark936(at)webtv.net wrote:



 > 

 > 

 > john likes to lift with straps on engine mount but I heard somewhere

 > that you could do possible damage.  So I was looking for jacks.

 > 

 > we have a gizmo like Kabong mentioned but with 10 inches of chain for

 > one wheel/leg at a time.

 > 

 > I heard that a hoist on the engine for AFT problems along with the wing

 > jacks works well since there are six bolts in there.

 > 

 > I'll probably do the hoist either on the engine with straps or leg gear

 > after Harry H. finishes with the cherry picker on the field.  And I'm

 > not there so I won't have much say so.  It will just get done.

 > 

 > I have full fuel in the wing.

 > 

 > Thanks for input.  (you know how hard it was getting those unused three

 > legged jacks in the C-182 from a RV friend at Compton?)  

 > 

 > and I'll still have to buy him a bottle of wine.

 

Dettori Badde Nigolosu from Sardegna, Italy, 1999 vintage.  Oh wait,

you can't get any, I just bought the last bottle.  How about a beer...



Actually you would think those wings would be able to handle it especially

with a grade 8 bolt, especially if you raised the tail.  I thought 

rockets were stronger than that.    Using the engine mount seems

like a worse idea.  The engine mount bolts aren't designed to lift

an entire airplane, just the motor and associated power the engine 

develops.  Plus, you are going to need a tall jack to get the wheels

off the ground.  Just pondering outloud.



-- 

Walter Tondu

http://www.rv7-a.com - Flying!

http://www.evorocket.com - Building

T.gummo(at)verizon.net
Guest

Posted: Mon Jul 16, 2007 6:52 pm Post subject: Harmon Rocket HR-2 jack points

 	  Quote: 	
		  

 Actually you would think those wings would be able to handle it especially

 with a grade 8 bolt, especially if you raised the tail.  I thought

 rockets were stronger than that.    Using the engine mount seems

 like a worse idea.  The engine mount bolts aren't designed to lift

 an entire airplane, just the motor and associated power the engine

 develops.  Plus, you are going to need a tall jack to get the wheels

 off the ground.  Just pondering outloud.



 -- 

 Walter Tondu


	




It has to do with CG.  When I tried to jack the plane at both tie down 

points, I looked up to see the tailwheel leave the ground.  You have to 

either tie the tail down or add weight to the tail to jack both wheels off 

the ground at the same time.  Say to align the wheel pants.



Tom Gummo

Apple Valley, CA

Harmon Rocket-II



do not archive



http://mysite.verizon.net/t.gummo/index.html

walter(at)tondu.com
Guest

Posted: Mon Jul 16, 2007 7:04 pm Post subject: Harmon Rocket HR-2 jack points

> It has to do with CG.  When I tried to jack the plane at both tie down 

 > points, I looked up to see the tailwheel leave the ground.  You have to 

 > either tie the tail down or add weight to the tail to jack both wheels off 

 > the ground at the same time.  Say to align the wheel pants.

 

I see, makes sense.  I would get a 5 gallon bucket and fill it with

concrete with a tough chain in it, sticking up through the concrete.

Use it to keep the tail imobile.  I just don't like the idea of jacking

with the engine mount, just a personal preference.



It's easy with the nose gear planes, which is my only experience.



Thanks for the information. 

-- 

Walter Tondu

http://www.rv7-a.com - Flying!

http://www.evorocket.com - Building

T.gummo(at)verizon.net
Guest

Posted: Mon Jul 16, 2007 7:48 pm Post subject: Harmon Rocket HR-2 jack points

My is a Harmon Rocket II, I don't know anything about the CG with the new 

wing.



Tom Gummo

Apple Valley, CA

Harmon Rocket-II



do not archive



http://mysite.verizon.net/t.gummo/index.html



---

smokyray(at)yahoo.com
Guest

Posted: Thu Jul 19, 2007 7:45 am Post subject: Harmon Rocket HR-2 jack points

As for jacking up my Rocket, I use a floor jack with a small block Chevy engine lifting ring removed from the intake manifold bolts. The ring end bolts to the top of my floor jack the the "u" shaped end that bolts to the manifold becomes the lifting "U" that goes underneath my lower gear leg bolts and perfectly cradles the LG leg. Works great and I carry one of the chevy lifting rings in my toolbox, any floor jack will work. 

  For flat tires I "green slime" all my tubes before I install them (old motocross habit) to avoid flats in the field and carry a "come-along" rated for 3000 lbs. I have lifted my Rocket by the engine mount with the come-along. 



Rob Ray



Tom Gummo <T.gummo(at)verizon.net> wrote:[quote] --> Rocket-List message posted by: "Tom Gummo" 



My is a Harmon Rocket II, I don't know anything  about the CG with the new 

wing.



Tom Gummo

Apple Valley, CA

Harmon Rocket-II



do not archive



http://mysite.verizon.net/t.gummo/index.html



---

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