Couch Potato

Do you think up to 8 seconds would be enough for a hydraulic gear up (or down) sequence before the doors move ?

Thanks.

johnls

My Mig hydraulic gear takes 8 seconds to retract and I have set the doors to 11 seconds.



John

ianober

My Feedback: (12)

Depends on the system and how fast the motor is and also of your sequencer is using "true" seconds for timing. I say that because I tried using an RCBee sequencer for my hydraulices and it claims it can go up to 8 seconds but it is really more like 4 seconds. That was not enough time for me. I think the best sequencer for hydraulics is the Jettronic one, it uses true seconds and allows for plenty of time as well as differentially timing for up and down.

Couch Potato

Hello Guys,

I am asking this on behalf of a friend who is converting a SM Mig-29 from pneumatics to hydraulics.
He already has the JL-Bee sequencer which claims to go up to 8 seconds delay, well spotted Ian !
I will advise him that he may have to get the Jet-Tronic instead.

John I saw your Mig @ Shawbury and thanks for the advice.
I told my mate how good your A/B rings were !

If you count 8 seconds in your head (1000,2000.........8000) it seems a long time !

Julian S.

ianober

My Feedback: (12)

Julian, what system is he using for his pump and controller?

Couch Potato

Hydraulic system from India.
It has been suggested to me that there are better (albeit more expensive) solutions out there ?

ianober

My Feedback: (12)

Thats the one I am running, the UMS. There is a Eurokit version out there that does cost more but I have experience in a side by side comparison. Below is a video I took to do some troubleshooting but it will give you a good idea of how long it takes for my SU's wheels to get up in the plane:
[youtube]http://www.youtube.com/watch?v=_mVdezMiwRg[/youtube]

Couch Potato

Thanks Ian, I shall point my friend Wapflyer to this thread.

I'm sat here watching your video clip with a stop-watch, must get out more !

ianober

My Feedback: (12)

Great Julian, hope it helps out! Go to the pub and get a pint, thats getting out right?

jetmodeller

Hi Looks to me like they are not locking out,when locked out they should stay up regardless of presure!!regards Keith

Jgwright

Are you sure that you do not have any pipes in the way stopping the retract from locking?

John

ianober

My Feedback: (12)

Oh thanks for the input guys, the system has been fixed since then. There are no mechanical locks, hence the use of the hydraulic system. The problem was a bad check valve, already swapped it out and it works great. I posted the video to illustrate the amount of time it takes for the gear to retract, it was the only video I had.