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RE: Jetlegend Mig 29 Fulcrum - 2/20/2011 11:53 AM   
Aussie Bart



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Status: offline 		Hi Jeff

Have you had a chance to fly it yet??

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RE: Jetlegend Mig 29 Fulcrum - 2/20/2011 4:07 PM   
Edgar Perez



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quote:

ORIGINAL: Edgar Perez

I made a drawing with the full conversion. Can anyone confirm its correct?
Thanks



quick question: Seems to me that using a Y-connector (QSMY-4) or a T-connector (QSMT-4) achieves the same, right?

Just found out I have some T-connectors around...


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RE: Jetlegend Mig 29 Fulcrum - 2/20/2011 4:47 PM   
Jim Cattanach



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Status: offline 		Does exactly the same job. The use of one rather than the other, is just a matter of direction of the lines.

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RE: Jetlegend Mig 29 Fulcrum - 2/20/2011 8:26 PM   
enrico63


 

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Status: offline 		Hi I ' m Enrico from Italy  and I have a question for you. I 've  a FEJ viper and I'd like ti convert the landing gear in hiraulic version. Can i Use  the same piston of my retract and buy only the ums conversion kit? Best regards Enrico 

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RE: Jetlegend Mig 29 Fulcrum - 2/20/2011 8:28 PM   
Aussie Bart



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Status: offline 		Yes Enrico, standard piston and seals are perfect

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RE: Jetlegend Mig 29 Fulcrum - 2/20/2011 8:31 PM   
enrico63


 

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Status: offline 		TKS I'll order my conversion tomorrow and if it works well  I'll buy it also for my F14. The air system is a very big problem in every model. Regards Enrico 

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RE: Jetlegend Mig 29 Fulcrum - 2/20/2011 8:39 PM   
enrico63


 

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Status: offline 		Sorry I 've the last question. Why you use the pilot Festo valve ? it 's not in the  ums scheme and how do you connect that valve? I 'll be happy if you could answer my question. Then i'll not disturb you. Promise. 

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RE: Jetlegend Mig 29 Fulcrum - 2/20/2011 9:25 PM   
jeff sewell


 

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Status: offline 		Bart,

I managed to get enough time to mount a switch tonight...even had the turbine spooled on gas!

Not much to do but little time to do it as usual!

Balancing and set-up to do...

May get to the next meeting at Elvington with it.

looking forward very much to flying it...eventually!

Jeff



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RE: Jetlegend Mig 29 Fulcrum - 2/21/2011 3:27 AM   
ianober



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quote:

ORIGINAL: enrico63

Sorry I 've the last question. Why you use the pilot Festo valve ? it 's not in the  ums scheme and how do you connect that valve? I 'll be happy if you could answer my question. Then i'll not disturb you. Promise. 



Enrico, read through this thread and you will find the answers to both of your questions. Good luck.

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RE: Jetlegend Mig 29 Fulcrum - 2/21/2011 7:54 AM   
Aussie Bart



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Status: offline 		Enrico
You will not need any locking valves, these are only used on the JL Mig & SU27 because they have NO mechanical locking up or down. I use the standard hydraulic system (no Festo locking valves) in my Vampire and JLT45 as they have mechanical locks built in the trunnions.

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RE: Jetlegend Mig 29 Fulcrum - 2/23/2011 6:54 PM   
ianober



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Status: offline 		Thanks to Rob I got a jet-tronics sequencer hooked up and it worked a treat!! The timing is good and allows for plenty of time for the gear to stow before closing the doors. I have not hooked up the air to the system yet cause I still need to see about getting the left main fixed so that it gets all the way into the fuse. Once that is done then I should be all set but the hydraulics are working great. Big thanks to Bart for the assistance and education on how to get the system up and running. I think I may be using hydraulics on my A-6 when she is ready to go (long time )

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RE: Jetlegend Mig 29 Fulcrum - 2/23/2011 7:47 PM   
Jim Cattanach



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Status: offline 		Going out tomorrow to fly mine & try & solve the out of trim roll problem.

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RE: Jetlegend Mig 29 Fulcrum - 2/23/2011 8:06 PM   
i3dm


 

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ORIGINAL: Jim Cattanach

Going out tomorrow to fly mine & try & solve the out of trim roll problem.


WHich out of trim roll problem ?

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RE: Jetlegend Mig 29 Fulcrum - 2/23/2011 8:26 PM   
ianober



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ORIGINAL: i3dm


quote:

ORIGINAL: Jim Cattanach

Going out tomorrow to fly mine & try & solve the out of trim roll problem.


WHich out of trim roll problem ?


Start reading at post #434.

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RE: Jetlegend Mig 29 Fulcrum - 2/24/2011 3:58 PM   
Jim Cattanach



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Status: offline 		I changed from elevons to seperate elevator & ailerons. Took off & the jet slowly rolled over. No amount of opposite control made any difference. The jet is a total loss. There was a major flaw in mine, but I could not find the reason.
I think I will avoid Chinese jets for now.
Good luck guys.

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RE: Jetlegend Mig 29 Fulcrum - 2/24/2011 5:01 PM   
ianober



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Status: offline 		I am sorry to hear that Jim. Did you measure the incidence on each wing to see if they were different? I have a feeling that could have been it.

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RE: Jetlegend Mig 29 Fulcrum - 2/24/2011 5:41 PM   
Jim Cattanach



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Status: offline 		I don't have an incidence meter. I used an electrical protractor & both wings were almost identical. The amount of variation when using elevons was a lot & I was reluctant to try with just ailerons. I thought that with the ailerons being out on the wingtips, it would be enough to counter the variation. WRONG. It is a mystery I could not find any reason for & I checked the jet over for hours, with no result.

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RE: Jetlegend Mig 29 Fulcrum - 2/25/2011 9:27 AM   
enrico63


 

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Status: offline 		Tks for the informations but i Have bought a hydraulic conversion kit fro ums india. The order status says COMPLETED but I have no other information from them I tried to contact them.No result. Do you have experience with them?  Regards Enrico 

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RE: Jetlegend Mig 29 Fulcrum - 2/25/2011 1:32 PM   
Edgar Perez



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Status: offline 		UMS did deliver ok. I only got an email from them after receiving the parts, for a customer satisfaction survey.

I will say not to worry...

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RE: Jetlegend Mig 29 Fulcrum - 2/25/2011 7:23 PM   
JohnMac



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Status: offline 		Both wings where OK measured whrere? Was there any twist in the wings or the tailplane?

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RE: Jetlegend Mig 29 Fulcrum - 2/25/2011 8:20 PM   
Rider-60



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Status: offline 		Jim,

sorry for your loss,

might be a bit late but have you had a look at the pipe? if it is twisted it could induce a roll like a vector system.

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RE: Jetlegend Mig 29 Fulcrum - 2/26/2011 5:30 AM   
Jim Cattanach



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quote:

ORIGINAL: JohnMac

Both wings where OK measured whrere? Was there any twist in the wings or the tailplane?


John. I used the protractor on many different measured points on the surfaces & everything was virtually identical. Line of sight showed nothing. Lateral balance was spot on. The jet appeared straight & true. With the amount of adjustment needed to counter the effect, the cause should have been obvious to see. The effect remained constant at all speeds & throttle settings. It will remain a mystery it seems.

Rider-60. The tailcones have arrows on them to make sure they are fitted correctly. The pipe was straight, true & level. Also as I said, the effect did not alter with the turbine at idle, or full power.

Jeff Sewell (UK Jet Legend rep) has contacted me with a generous offer of a choice of replacement Jet Legend products at around cost price. I would like another Mig, but may chicken out & choose another I like, (the L39). Many thanks Jeff. You provide excellent customer support. I will be in touch later today.

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RE: Jetlegend Mig 29 Fulcrum - 2/26/2011 8:13 AM   
JohnMac



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Status: offline 		Hi Jim,
Like you say anything that causes such a pronounced roll should be blindingly obvious. It sounds like you can discount radio too as I cannot imagine a scenario were these events would play out due to any kind of radio failure. Like you say, a real mystery. Sorry for your loss and I hope you next project is more succesful.
Regards,
John

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RE: Jetlegend Mig 29 Fulcrum - 3/12/2011 9:03 PM   
i3dm


 

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Status: offline 		Guys,

How are you usually filling up the hydraulic system oil reservoir for the first time, and how do you purge the air on the first few runs of the hydraulic system ?

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RE: Jetlegend Mig 29 Fulcrum - 3/12/2011 9:58 PM   
johnls


 

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Status: offline 		With the reservoir vertical, unscrew the top and fill it up. To purge the air out of the system, after a few cycles it will go as the air rises to the top. If you have a problem you may have to stand the model on its nose and cycle the system.



John

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