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  1. #501

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    RE: Jetlegend Mig 29 Fulcrum

    Hi Rob,
    Sorry to hear of your problems. Perhaps I should have mentioned it, but I too had a hydraulic line swell into a bubble many months ago. I saw it before it burst and replaced the line, with mine I know that heat was not an issue and I look at the lines in my preflight check. My system is now operating well, the only problem I have now is I am now on the fourth of the UMS hydraulic pumps. They all leak and let air get into the system, I have just ordered a Eurokit pump.






    John
    CRASHING IS NOT AN OPTION.

  2. #502

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    RE: Jetlegend Mig 29 Fulcrum

    I think Jet Central was before saying their kero start pulls 18A for about 10 seconds.
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  3. #503
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    RE: Jetlegend Mig 29 Fulcrum

    John,

    So you had a line bubble also. Very interesting. I'm going to research the availability of high pressure 4 mm lines for replacement of all of my lines. This was the last place I expected problems as I had cycled the gear at least 40 times w/o any problems whatsoever. My problem with the line may just have been coincidental with the location of the turbine electrical lines. Dunno.

    As far as the flying went, I think your CG at the back of the cross brace was right on. I needed about three clicks of down and two clicks of left and she flew straight and level. This airplane definitely has a presence in the air.

    Haven't disassembled the gear yet to learn the extent of the damage. I think it will be fairly simple to repair. I also noticed one of the door hinges that broke was the really small one on the left main door. I've not seen these available anywhere in the after market. This could be a challenge to locate one.

    It appears Murphy's Law is still valid. On the 41st. cycle, which also happened to be the maiden flight, the line burst. Why didn't it burst on the 39th. cycle on the ground?

    Rob
    F15driver
    Don't look back, they may be gaining on you!

  4. #504

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    RE: Jetlegend Mig 29 Fulcrum

    Rob,
    My bubble was in a 3mm line from the main gear where it rubbed on the fuselage. The other thing I have noticed is that when the model is in the air the main gear turns and retracts against the airflow, this in turn must load the system up much more than on the ground. I get airborne and throttle back until the gear is away.





    John
    CRASHING IS NOT AN OPTION.

  5. #505
    dionysusbacchus's Avatar
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    RE: Jetlegend Mig 29 Fulcrum

    .

    Jet Mafia RC Turbine Flyers Seguin

  6. #506

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    RE: Jetlegend Mig 29 Fulcrum

    my Eurokit set came with a BLUE color line (non Festo). which line were you guys using ?
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  7. #507

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    RE: Jetlegend Mig 29 Fulcrum

    Festo.




    John
    CRASHING IS NOT AN OPTION.

  8. #508
    dionysusbacchus's Avatar
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    RE: Jetlegend Mig 29 Fulcrum

    Awesome plane!
    Jet Mafia RC Turbine Flyers Seguin

  9. #509

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    RE: Jetlegend Mig 29 Fulcrum

    My Mig 29 will be ready soon and i would like to ask you guys:

    1. whats the recommended control throws ?
    2. recommended CG is at the back of the main wing cross bar, right ?
    3. Did you put any ballast weight in the stabs ? with Hitec 7955 servos i get a buzz in the servos and stab, probably because the stab's trailing edge is heavy..
    4. Did you mount the end of the pipe about 5-10mm inside the tail cone like JL recommends in the plan ?
    5. did anyone mount a P-160 in the Mig ? if so can you post pics ? it seems that with the above pipe mounting the engine would have to go forward a lot, and probably the starter would have to protrude through the front of the inlet ducting.
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  10. #510
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    RE: Jetlegend Mig 29 Fulcrum

    Here is a picture of Jeff Sewells installation with a Wren 160. I am fitting a Merlin 160 in mine and my starter will have to protrude throught the centre of the intake ducts. I alsways statically balance my stabs. Others don't bother. Moot point!
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  11. #511

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    RE: Jetlegend Mig 29 Fulcrum


    ORIGINAL: JohnMac

    Here is a picture of Jeff Sewells installation with a Wren 160. I am fitting a Merlin 160 in mine and my starter will have to protrude throught the centre of the intake ducts. I alsways statically balance my stabs. Others don't bother. Moot point!
    Interesting:

    1. Is the Wren 160 shorter in length than the P-160 ? seems like it.
    2. are everyone having to mount the batteries so far back in order to achieve the correct CG ?
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  12. #512
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    RE: Jetlegend Mig 29 Fulcrum

    Yes and Yes.
    I am fitting a Merlin 160 and like the Jetcat it is longer so needs the duct cutting out for the starter as I mentioned.

  13. #513

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    RE: Jetlegend Mig 29 Fulcrum

    Can anyone post some install pics of a P-160 ? how did you route the fuel lines ? did you manage to install a FOD net inside ? this would be a problem since the intake will disturb the net.
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  14. #514

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    RE: Jetlegend Mig 29 Fulcrum

    ORIGINAL: i3dm

    My Mig 29 will be ready soon and i would like to ask you guys:

    1. whats the recommended control throws ?
    2. recommended CG is at the back of the main wing cross bar, right ?
    3. Did you put any ballast weight in the stabs ? with Hitec 7955 servos i get a buzz in the servos and stab, probably because the stab's trailing edge is heavy..
    4. Did you mount the end of the pipe about 5-10mm inside the tail cone like JL recommends in the plan ?
    5. did anyone mount a P-160 in the Mig ? if so can you post pics ? it seems that with the above pipe mounting the engine would have to go forward a lot, and probably the starter would have to protrude through the front of the inlet ducting.

    This thread seems to have gone to sleep - my Mig 29 will fly in a week or so - can you guys advise the recommended control throws ?
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    www.liorzahavi.com
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  15. #515

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    RE: Jetlegend Mig 29 Fulcrum

    Hi,
    I used the throws on the plans - seem to be ok but for a little tweaking to taste.

    Jeff
    Exclusive UK JetLegend Dealer

  16. #516

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    RE: Jetlegend Mig 29 Fulcrum

    I dont have the plan by me at the moment - any expo or anything else required ?
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  17. #517

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    RE: Jetlegend Mig 29 Fulcrum

    My Mig-29 had 5 wonderful flights this past weekend at Ein Yahav - Israel.

    Maiden flight was with a 15 knots cross wind and was still a breeze !

    Some pics...
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  18. #518

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    RE: Jetlegend Mig 29 Fulcrum

    Congrats, on your maiden. They fly well don't they!!





    John
    CRASHING IS NOT AN OPTION.

  19. #519

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    RE: Jetlegend Mig 29 Fulcrum

    Very well !

    This is only flight #3, with a special landing

    [youtube]http://www.youtube.com/watch?v=XFoCQ5gJ6LI[/youtube]
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  20. #520
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    RE: Jetlegend Mig 29 Fulcrum

    Congratulations, this plane just looks great, enjoy

  21. #521

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    RE: Jetlegend Mig 29 Fulcrum

    Some more pics of the first flights, taken by our wonderful photographer Mr. Avgar Idan.

    Thanks for the pics Avgar my friend !
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  22. #522

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    RE: Jetlegend Mig 29 Fulcrum

    For those interested, here are some more videos of my MIG-29:

    Maiden flight (in 15 knots cross wind ) :
    [youtube]http://www.youtube.com/watch?v=nl0EL3FEbT0[/youtube]

    flight #2:
    [youtube]http://www.youtube.com/watch?v=qeHSyPkYt1w[/youtube]

    flying with some SM Viperjets (with Nessy Gil and Yossi Shveka):
    [youtube]http://www.youtube.com/watch?v=xlWxt8ufiek[/youtube]
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  23. #523

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    RE: Jetlegend Mig 29 Fulcrum

    Dear Bart
    Your advise on the hydraulic conversion is very helpful. Could I ask you just to list all the the extra festo items and quantity of each you suggested to, have the unit working correctly.
    Thank you
    JB

  24. #524

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    RE: Jetlegend Mig 29 Fulcrum

    Some more of the JL Mig-29...

    nice landing:
    [youtube]http://www.youtube.com/watch?v=XFoCQ5gJ6LI&feature=channel_video_title[/youtube]

    some lights from details4scale:
    [youtube]http://www.youtube.com/watch?v=wU4lRa216rw&feature=channel_video_title[/youtube]

    simulated after burners also from details4scale:
    [youtube]http://www.youtube.com/watch?v=lMSa97h4fKI&feature=channel_video_title[/youtube]

    I also installed navigation lights (on fins and wing tips) - no video yet...
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  25. #525

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    RE: Jetlegend Mig 29 Fulcrum

    Hi,
    I've now logged about 40 flights on my MIG and am really enjoying it. Feels locked in and very smooth and easy to land.

    Mine is using the 'updated' retract system with the secondary locking cylinder. There has only been a couple of issues with them failing to lock up or down; one were one of the mains snagged on a loose pipe (my fault) and another with a problem with the nose door.

    I have filed the peaks on the slots on the side frames on the secondary cylinder slightly, as the main cylinder can lock the system under higher pressures. This happens when the main cylinder applies force on the secondary locking pin and this pin cannot withdraw over the peaks of the locking mechanism whilst under high load.

    The only other thing that this system needs is to be kept clean and lubed properly, as part of regular servicing.

    Cheers

    Jeff
    Exclusive UK JetLegend Dealer


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