Enstrom 280 Ground Hop

[Montanamack]

any ideas on solving ground hop on enstrom 280fx

[67november]

contact Enstorm, they should have an answer, or at least you can make them aware of your problem.

 

Customer Service/Support Contacts

Phone number for all contacts: 906-863-1200

[apiaguy]

When is it occuring? During run-up? At flight rpm flat pitch? As you begin to pull collective?

 

Only options are going to be strut maintenance or rotor track and balance. But depending on when it occurs will give you the clue to what the problem is.

[Montanamack]

When is it occuring? During run-up? At flight rpm flat pitch? As you begin to pull collective?

 

Only options are going to be strut maintenance or rotor track and balance. But depending on when it occurs will give you the clue to what the problem is.

 

 

when you pull pitch...on a hard surface..as you get light on the skids...bad enough you can not do a two stage pick-up..have to pull right throught getting light on the skids....i am told this is common with Enstrom...only have 35 hours flying enstoms??

[BOATFIXERGUY]

One of two things... your struts have too much pressure in them or you need to bleed the dampners.

 

You can isolate this pretty easy...

For dampners: When you're preflighting the blades, if it's not smooth when you "lead and lag" them there's air in the dampners. Also, If in forward flight you get a "lope," then it's the dampners. Bleed them.

 

For the struts, pull down on the tail. It should squat a little. I've seen A/P's over fill them. If it doesn't squat...too much nitro. Enstrom has in the manual the correct settings, but it really needs to be fine tuned for what you normally do with the bird. i.e two vs three passengers.

 

john

[gomwrench]

One of two things... your struts have too much pressure in them or you need to bleed the dampners.

 

You can isolate this pretty easy...

For dampners: When you're preflighting the blades, if it's not smooth when you "lead and lag" them there's air in the dampners. Also, If in forward flight you get a "lope," then it's the dampners. Bleed them.

 

For the struts, pull down on the tail. It should squat a little. I've seen A/P's over fill them. If it doesn't squat...too much nitro. Enstrom has in the manual the correct settings, but it really needs to be fine tuned for what you normally do with the bird. i.e two vs three passengers.

 

john

 

 

Does the ground bounce go away when you get light on the skids? If that the case, you have a binding somewhere in a landing gear pivot point. I just recently returned from enstrom maint school and they stressed oleos and binding in a pivot point somewhere in the ldg gear being a culprit for ground bounce that goes away when you get light.

 

Of course damper bleeding can fix just about any problem. Them dampers sure are maint hogs.