Has anybody made a jacking cradle?

cfiatzph · Post by **cfiatzph** » Thu Dec 14, 2006 6:23 pm

Just curious how many people on here have jacking cradles? My jacking bracket is crap and I'm always afraid its going to slip and fall on the axles. With a craddle I'd be pretty much guaranteed it won't sleep and I can do a shake test and take the legs off without a problem if I want to remove them. Anybody have any pictures of their craddles? I can't find my book with the plans.

Thanks

minton · Post by **minton** » Thu Dec 14, 2006 8:49 pm

try the maint. manual. in the back it has one

Post by **GAHorn** » Thu Dec 14, 2006 8:58 pm

Here's a simple way to do it. Just place the jacks against carpet covered boards at the fwd spar or directly on the tie-down rings instead.

http://home.earthlink.net/~n6d4/170b.htm

Notice Bob's last two pics which demonstrate how compression tailwheel steering springs can rip out the rear bulkhead and cause other damage.

bradbrady · Post by **bradbrady** » Fri Dec 15, 2006 2:02 am

I have a real simple cradle, that uses two low wing jacks. If I can, tormorow, I'll take Pic's and send.
brad

cfiatzph · Post by **cfiatzph** » Fri Dec 15, 2006 1:45 pm

Where does the craddle on the bottom of the aircraft attach to? Is it directly between the gear legs? The reason I ask is this particular aircraft has a Garmin 430 will all kinds of stuff sticking out the bottom of the airplane. Markers, transponder, comm etc etc etc.

sphillips · Post by **sphillips** » Fri Dec 15, 2006 2:56 pm

When you are jacking individual gear legs, whether it be a conventional gear or tricycle, once the wheel assy is removed put a a 4X4 or 6X6 under the axle. Then lower the axle onto the lumber.

cfiatzph · Post by **cfiatzph** » Fri Dec 15, 2006 6:17 pm

Anybody have a scan of the maint manual that discusses how to make a craddle. The reason I want to do this is because I'm planning to remove the legs sometime soon.

bradbrady · Post by **bradbrady** » Mon Dec 18, 2006 2:40 am

cfiatzph,
Do you have a first name? Any way, I went out Friday to check the hanger for the cradle that I said that I would show. I couldn't find it! Then I got thinking, I lent it out about 4 years ago! (I should wright these things down!!!!) I think I have found it! waiting on a call back. but pretty much know where it is! As I said it is pretty simple, two straps running up each side of the gear legs coupled toghter with a few straps and the jack points just inside the leg openings. If you don't have any thing in the gear leg area, you will not have any problem with the type of cradle I have! I can't see anyone putting an antenna in this area! But stranger things have happned! If you are willing to pay for shipping both ways I'll lend it to you any time! Or anyone else! (As long as I'm right and have found it!) But any way, if you elect to go this way, make a copy! (I don't have a pat. or want one) and you have one for yourself, If you like it!
brad

johneeb · Post by **johneeb** » Sat Dec 23, 2006 5:13 am

brad, is this what you were looking for.

bradbrady · Post by **bradbrady** » Sun Dec 24, 2006 1:49 am

John,
That is even more simple than mine! I have two straps running, one up the upper side like yours and a strap running up the lower side. ( so if something slips it will be mitiguated) the two sides are connected toghter and run up the side of the A/C beond the strutt opening. I talked to the person that I thought had my cradle and no joy! (I wonder where It is) I'm sure it will show up. (because the only people that would want it are 170 people) and if I don't find it in the pile of things I have put together since the fire, someone will say (OH brad I have your cradle)!! well see.
brad

blueldr · Post by **blueldr** » Mon Dec 25, 2006 12:31 am

I made my fuselage cradle by cutting a piece of 4x4 lumber to conform to the fuselage bulkhead just aft of the landing gear and lining it with carpet.

This cradle will fit all the early models of Cessnas--- C-170,C-172,
C-175,C-180,and C-182.

minton · Post by **minton** » Sun Jan 11, 2009 9:13 pm

The Cessna repair manual has a good one

n2582d · Post by **n2582d** » Mon Jan 12, 2009 1:44 am

: Click to Enlarge

: Click to Enlarge

Post by **GAHorn** » Mon Jan 12, 2009 2:46 pm

cfiatzph wrote:Where does the craddle on the bottom of the aircraft attach to? Is it directly between the gear legs? The reason I ask is this particular aircraft has a Garmin 430 will all kinds of stuff sticking out the bottom of the airplane. Markers, transponder, comm etc etc etc.

Cessna's instructions have you jack the aircraft by lifing AT/UPON THE GEAR LEGS. "The jacking block must be long enough to bear against the landing gear spring, clear of the fuselage." Notice that they are NOT lifting the aircraft by the gearbox/belly. This requires the gear legs to actually be utilized to lift the aircraft. Clearly this requires the gearlegs to remain in place, which is useless if the reason for jacking is to remove the gearlegs. This is why I like lifting the aircraft by the wings at/near the outer strut attach points as you would a retractable Cessna.

jrenwick · Post by **jrenwick** » Tue Jan 13, 2009 1:56 am

gahorn wrote:...This is why I like lifting the aircraft by the wings at/near the outer strut attach points as you would a retractable Cessna.

Or lift by the engine mount with a hoist from the overhead or an engine hoist, if you've got one standing around (much cheaper than a set of wing jacks). Put a weight on the floor under the lightest wing, and attach a tiedown rope to it.

Is there a problem with lifting a 170 this way?

John

The International Cessna 170 Association

Has anybody made a jacking cradle?

Has anybody made a jacking cradle?

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