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Ripmax Hawker Hunter landing gear issue

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Ripmax Hawker Hunter landing gear issue

Old 01-22-2019, 09:53 AM
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Bigells
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Default Ripmax Hawker Hunter landing gear issue

Iím writing this post in the hope of getting some help from the jet community. Iím building a Ripmax Hunter kit. The kit was about 6 years old when I got it.

Iím having a problem with one of the wing landing gear actuators. After it was set up and testing began the left gear actuator became slower and slower with each cycle to the point now it is frozzen up and will not move.
I took the gear apart and the piston seems to be the issue. An orange silicon type material is extruding out of the piston at the pushrod exit. It looks to have jammed the actuator up.

I have written to Ripmax with no response. Im looking for any help with this and or if some one has a spare they would be willing to sell that would be great.
Is thier a substatute for this actuator that can be purchased.

Any help to to get this plane to fly from being AOG would be greatly appreciated.

regards
Bigells
Old 01-22-2019, 12:01 PM
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Dave Wilshere
 
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Pm Colin Straus on the RCJI thread, he maybe able to help.
Old 01-22-2019, 12:19 PM
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rhklenke
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Originally Posted by Bigells View Post
Iím writing this post in the hope of getting some help from the jet community. Iím building a Ripmax Hunter kit. The kit was about 6 years old when I got it.

Iím having a problem with one of the wing landing gear actuators. After it was set up and testing began the left gear actuator became slower and slower with each cycle to the point now it is frozzen up and will not move.
I took the gear apart and the piston seems to be the issue. An orange silicon type material is extruding out of the piston at the pushrod exit. It looks to have jammed the actuator up.

I have written to Ripmax with no response. Im looking for any help with this and or if some one has a spare they would be willing to sell that would be great.
Is thier a substatute for this actuator that can be purchased.

Any help to to get this plane to fly from being AOG would be greatly appreciated.

regards
Bigells
I have a set of that gear for my Hawker Hunter I am building from the Mick Reeves kit. I've not seen the issue you are talking about. Can you post a picture of the problem so we can see it?

Bob
Old 01-22-2019, 12:23 PM
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Bigells
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Default Hunter gear issue

There is not much to see, the actuator is frozen up.
Old 01-22-2019, 02:05 PM
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Dave Wilshere
 
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Cylinder might be the same as on JL gear.
Old 01-22-2019, 02:09 PM
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Originally Posted by Bigells View Post
There is not much to see, the actuator is frozen up.
I can't tell from your description where the "orange silicon type material" is coming out. When you say that you " took the gear apart," does that include taking the cylinder apart and removing the piston such that you can see the piston O-ring?

You're going to have to take the cylinder apart, remove the piston, and inspect the piston O-ring and the O-ring on the cylinder where the pushrod comes out.

Bob
Old 01-22-2019, 04:04 PM
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speed is life
 
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Hi Bigells,
I have the same Ripmax/ Flying Legends/GJC Hunter that you are taking about.
The orange silicon type goo is what is left of your cylinder piston O-ring.....my gear never froze up completely but it got so stiff that it would not retract reliably. The O-rings were swollen mush.
No telling what that orange O-ring was made of but they will swell/fall apart/or turn to goo.
I had to remove and replace all my retract cylinder O-rings with metric Viton replacements.
Sorry, but I canít remember what size I had to use.

The Flying Legends/Ripmax kit was produced by FeiBao.

Good Luck,
Mike

Last edited by speed is life; 01-22-2019 at 04:32 PM.
Old 01-23-2019, 04:51 AM
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DAVAL
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I sent my Hawker Hunter gear to Down & Lock & made them Electric
I think I have the cylinder out of the gear if your interested
Dave
Old 01-23-2019, 09:29 AM
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Bigells
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Default Hawker Hunter gear.

Hi
Yes I would be interested in them. What would you like for them?
What did it cost you for the conversion to electrical?

Steven


Old 01-27-2019, 08:12 PM
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Bigells
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Default H Hunter gear cylinders

Originally Posted by DAVAL View Post
I sent my Hawker Hunter gear to Down & Lock & made them Electric
I think I have the cylinder out of the gear if your interested
Dave
Hi Dave
Please let me know what you would like for the cylinders, I could really use them.
Regards
Bigells
Old 01-27-2019, 11:38 PM
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Hi Bigells,

Did you receive the reply to your PM I sent you last week?

Colin Straus

Ripmax Ltd and RCJI Magazine
Old 01-28-2019, 04:01 AM
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DAVAL
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Hi
With shipping it cost me $975.00. They really work great & flaw less.
You can have my old cylinder --I will never need them , just pay for the shipping.
my email is rjdave49@gmail.com

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