Register

If this is your first visit, please click the Sign Up now button to begin the process of creating your account so you can begin posting on our forums! The Sign Up process will only take up about a minute of two of your time.

Page 20 of 25 FirstFirst ... 101819202122 ... LastLast
Results 476 to 500 of 624

  1. #476

    Join Date
    Jun 2004
    Location
    ReutIsrael, ISRAEL
    Posts
    3,099
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Jetlegend Mig 29 Fulcrum

    so one thing im still not sure about is once the system is all mounted up and working, and i fill up the reservoir for the first time, all the lines are full with air. once the pump starts flowing oil, it will go into tubes full of air, and on the other side of the tube is a sealed cylinder - where will all this air go ?
    www.liorzahavi.com
    www.youtube.com/i3dm

  2. #477
    tp777fo's Avatar
    Join Date
    Feb 2002
    Location
    Greer, SC
    Posts
    2,110
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Jetlegend Mig 29 Fulcrum

    Rob (F15driver) had the same problem. Running the system moves the bubbles towards the oil tank. To help it alone remove the lines and hold them straight up as much as you can. This will allow the fluid to collect at the bottom. Fill the tank totally full and run the system several times. You will see the bubble at the tank get larger. This is the air in the lines collecting in the tank. Fill the tank again and keep doing this. We got all the air out of Rob's system in a couple of tries.
    Tom Perry
    In Dog beers, I only had one!

  3. #478

    Join Date
    Jun 2004
    Location
    ReutIsrael, ISRAEL
    Posts
    3,099
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Jetlegend Mig 29 Fulcrum

    ORIGINAL: tp777fo

    Rob (F15driver) had the same problem. Running the system moves the bubbles towards the oil tank. To help it alone remove the lines and hold them straight up as much as you can. This will allow the fluid to collect at the bottom. Fill the tank totally full and run the system several times. You will see the bubble at the tank get larger. This is the air in the lines collecting in the tank. Fill the tank again and keep doing this. We got all the air out of Rob's system in a couple of tries.
    Remove which lines and hold them straight up ?

    BTW - i guess the unit doesnt have any servo travel programming - do you set the valve travel mechanically by changing the length of the servo horn ?

    I hope to test mine for the first time tommorow !
    www.liorzahavi.com
    www.youtube.com/i3dm

  4. #479
    tp777fo's Avatar
    Join Date
    Feb 2002
    Location
    Greer, SC
    Posts
    2,110
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Jetlegend Mig 29 Fulcrum

    Robs lines had been cut to the correct length but not tied down in the fuselage, we could pull them up and out of the fuselage to allow the air to escape.
    Tom Perry
    In Dog beers, I only had one!

  5. #480
    ianober's Avatar
    Join Date
    Aug 2002
    Location
    San Mateo, CA
    Posts
    4,427
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Jetlegend Mig 29 Fulcrum

    Just cycle the gear 3-4 times then refill the oil tank. Cycle again 3-4 times and then the system should be air free. Its a self bleeding system basically.

    Not sure what your getting at about the servo travel. The valve is controlled by a servo so you should be able to program the travel of the servo to use the valve like any other manual valve.

  6. #481

    Join Date
    Jun 2004
    Location
    ReutIsrael, ISRAEL
    Posts
    3,099
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Jetlegend Mig 29 Fulcrum


    ORIGINAL: ianober
    The valve is controlled by a servo so you should be able to program the travel of the servo to use the valve like any other manual valve.
    But if you change the end poitn of the gear channel does the electronic controller still work well ?
    www.liorzahavi.com
    www.youtube.com/i3dm

  7. #482
    Aussie Bart's Avatar
    Join Date
    May 2006
    Location
    Sale, AUSTRALIA
    Posts
    372
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Jetlegend Mig 29 Fulcrum

    Yep, just needs to see a change in signal
    Bart

  8. #483

    Join Date
    Jun 2004
    Location
    ReutIsrael, ISRAEL
    Posts
    3,099
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Jetlegend Mig 29 Fulcrum

    My Eurokit hydraulic gear works perfect since the start ! test video:

    [youtube]http://www.youtube.com/watch?v=JhI_yJzb_8w[/youtube]

    It did take one pump of oil, a few cycles tilting the fuse in different directions, and then another pump of oil into the tank, to bleed most of the air out. but the gear works awesome after this short break in !

    Im a happy camper ! seems like Eurokit did a really nice job with this hydraulic convserion. unlike other units, it worked from the get go !

    Added some pics of the installation as it was done by craftsman builder Mr. Peter Nir.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	cz79835.jpg 
Views:	35 
Size:	355.7 KB 
ID:	1578255   Click image for larger version. 

Name:	yt61603.jpg 
Views:	36 
Size:	366.4 KB 
ID:	1578256   Click image for larger version. 

Name:	io29132.jpg 
Views:	30 
Size:	308.0 KB 
ID:	1578257   Click image for larger version. 

Name:	vp38577.jpg 
Views:	40 
Size:	340.0 KB 
ID:	1578258   Click image for larger version. 

Name:	mx23781.jpg 
Views:	28 
Size:	342.1 KB 
ID:	1578259  

    www.liorzahavi.com
    www.youtube.com/i3dm

  9. #484

    Join Date
    Jan 2002
    Location
    Scottsdale, AZ
    Posts
    733
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Jetlegend Mig 29 Fulcrum

    Looks really good Lior,

    what did you need to do to the stock gear air cylinders so the oil would work and not leak. This may be the new way to work gear for many jets.

    Thanks

    Kevin

  10. #485

    Join Date
    Jun 2004
    Location
    ReutIsrael, ISRAEL
    Posts
    3,099
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Jetlegend Mig 29 Fulcrum


    ORIGINAL: Kmarks

    Looks really good Lior,

    what did you need to do to the stock gear air cylinders so the oil would work and not leak. This may be the new way to work gear for many jets.

    Thanks

    Kevin
    NOTHING - thats the best part.

    All stock !
    www.liorzahavi.com
    www.youtube.com/i3dm

  11. #486
    Edgar Perez's Avatar
    Join Date
    Dec 2001
    Location
    Gurabo, PUERTO RICO (USA)
    Posts
    2,003
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Jetlegend Mig 29 Fulcrum


    ORIGINAL: i3dm
    ORIGINAL: Kmarks
    Looks really good Lior,
    what did you need to do to the stock gear air cylinders so the oil would work and not leak. This may be the new way to work gear for many jets.
    Thanks
    Kevin
    NOTHING - thats the best part.
    All stock !
    Ok. Im' confused here. This thread indicates the need to use hysol to plug some hole or make new shuttle internals to avoid the oil blowback in the cylinders. Are you indicating that is no longer needed or i'm reading it wrong?
    If no longer needed, is that due to the new gear design (versus the original used by Bart and other in this thread)?

    Thanks
    Edgar Perez
    Puerto Rico

  12. #487

    Join Date
    Jun 2004
    Location
    ReutIsrael, ISRAEL
    Posts
    3,099
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Jetlegend Mig 29 Fulcrum


    ORIGINAL: Edgar Perez

    Ok. Im' confused here. This thread indicates the need to use hysol to plug some hole or make new shuttle internals to avoid the oil blowback in the cylinders. Are you indicating that is no longer needed or i'm reading it wrong?
    If no longer needed, is that due to the new gear design (versus the original used by Bart and other in this thread)?
    Thats exactly right. the new gear design has solid shuttles so no mods required.

    www.liorzahavi.com
    www.youtube.com/i3dm

  13. #488

    Join Date
    Jun 2004
    Location
    ReutIsrael, ISRAEL
    Posts
    3,099
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Jetlegend Mig 29 Fulcrum

    Guys,

    Whats the recommended CG for the JL Mig-29 ?
    www.liorzahavi.com
    www.youtube.com/i3dm

  14. #489

    Join Date
    Dec 2004
    Location
    PlaistowWest Sussex, UNITED KINGDOM
    Posts
    407
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Jetlegend Mig 29 Fulcrum

    If you read back in this thread there is information relating to the CG position. I found that the CG, that Jet Legend give is too far forward. I am flying mine with the CG at the back of the first wooden cross brace, in the engine compartment. (there is a photo of the position somewhere in this thread). A few pictures of mine flying at the weekend. http://www.rcuniverse.com:80/forum/m...mpage_9/tm.htm





    John
    CRASHING IS NOT AN OPTION.

  15. #490

    Join Date
    Jun 2004
    Location
    ReutIsrael, ISRAEL
    Posts
    3,099
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Jetlegend Mig 29 Fulcrum


    ORIGINAL: johnls

    If you read back in this thread there is information relating to the CG position. I found that the CG, that Jet Legend give is too far forward. I am flying mine with the CG at the back of the first wooden cross brace, in the engine compartment. (there is a photo of the position somewhere in this thread). A few pictures of mine flying at the weekend. http://www.rcuniverse.com:80/forum/m...mpage_9/tm.htm

    John

    Do you mean the front most wing spar ?

    Did anybody have any trouble with the gear doors ? my main door on the right side doesnt close all the way up... it stops a little shy from the fuse.
    www.liorzahavi.com
    www.youtube.com/i3dm

  16. #491

    Join Date
    Dec 2004
    Location
    PlaistowWest Sussex, UNITED KINGDOM
    Posts
    407
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Jetlegend Mig 29 Fulcrum

    Not the wing spar. The ply cross brace that goes over the engine and is held in by two bolts. I am pointing to it with the end of a screw driver. My doors shut OK but sometimes move when flying, with G load.



    John
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Bz77748.jpg 
Views:	30 
Size:	77.0 KB 
ID:	1581943  
    Attached Images Attached Images  
    CRASHING IS NOT AN OPTION.

  17. #492

    Join Date
    Jul 2005
    Location
    hull, UNITED KINGDOM
    Posts
    639
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Jetlegend Mig 29 Fulcrum

    Well, I finally flew mine yesterday... I used John's CG position too.

    Anyway, the MIG was very nice, felt very solid and easy to handle. The landings are a non-event - just so easy.

    Hope to have a couple of pictures uploaded soon...

    Cheers

    Jeff
    Exclusive UK JetLegend Dealer

  18. #493

    Join Date
    Dec 2004
    Location
    PlaistowWest Sussex, UNITED KINGDOM
    Posts
    407
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Jetlegend Mig 29 Fulcrum

    Congratulations on the flight Jeff. It almost lands it self, doesn't it!!




    John
    CRASHING IS NOT AN OPTION.

  19. #494

    Join Date
    Jan 2004
    Location
    leeds, UNITED KINGDOM
    Posts
    194
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Jetlegend Mig 29 Fulcrum



    Yes Jeff flights & landings looked very good.
    Well done

    Rgds Martin.

  20. #495

    Join Date
    Jul 2005
    Location
    hull, UNITED KINGDOM
    Posts
    639
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Jetlegend Mig 29 Fulcrum

    Thanks guys...

    Looking forward to the next ones.

    Jeff
    Exclusive UK JetLegend Dealer

  21. #496

    Join Date
    Jul 2005
    Location
    hull, UNITED KINGDOM
    Posts
    639
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Jetlegend Mig 29 Fulcrum

    Some pictures - thanks to John Mac...

    Jeff
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	hf99713.jpg 
Views:	46 
Size:	52.8 KB 
ID:	1583512   Click image for larger version. 

Name:	Ay73824.jpg 
Views:	27 
Size:	18.3 KB 
ID:	1583513   Click image for larger version. 

Name:	Ge96370.jpg 
Views:	46 
Size:	24.9 KB 
ID:	1583514  
    Exclusive UK JetLegend Dealer

  22. #497
    dionysusbacchus's Avatar
    Join Date
    Dec 2002
    Location
    McQueeney, TX
    Posts
    2,016
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Jetlegend Mig 29 Fulcrum

    .
    "Don't believe everything you read on the internet"
    --Abraham Lincoln

  23. #498

    Join Date
    Jun 2004
    Location
    ReutIsrael, ISRAEL
    Posts
    3,099
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Jetlegend Mig 29 Fulcrum

    What the heck happend to that line ? and where is the video ?
    www.liorzahavi.com
    www.youtube.com/i3dm

  24. #499
    F15driver's Avatar
    Join Date
    Dec 2001
    Location
    New Braunfels, TX
    Posts
    250
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Jetlegend Mig 29 Fulcrum

    If you look closely at the bad hydraulic line you'll notice the main Red, Black and Blue electric lines that go into the side of the Jet Central Rhino. I'm 99% certain this electric line which powers the Kero Start on the turbine was laying on top of the hydraulic line. I hadn't run the turbine for awhile and it took 2 starts to get it going. I think the high current draw required to start these turbines warms the electric lines and because I had to go through the start routine twice, I think the electric lines were warm enough to soften the hydraulic line. When I hit the gear down switch, I think the pump hydraulic pressure burst the line and caused only one gear to go down before all the sewing machine oil blew into the engine bay area.

    With the right main hanging down and the other two stuck in their up position, my choice was to land on the paved runway and skin the entire bottom or try to ease it into the grass in a nose high attitude. I chose the latter option and it was the right one. The right main gear base plate was separated from the strut which will need repair and two of the gear door hinges were broken. Two gear doors also were cracked in a couple of places and the right wing had a small indentation which is easily repairable.

    The puff of smoke you see in the one frame is when the hydraulic oil was pumped into the engine area and some actually went through the turbine. Aside from a lot of grass on the inside of the airplane and the inlets having a bunch of grass, the FOD screen kept it all out of the turbine.

    So, the lesson here is to pay particular attention to where your battery cables and engine power electric lines are run. Do not have them next to hydraulic or pneumatic lines. All in all, I was lucky that the right main being down did not cause the plane to cartwheel when it landed. The nose high landing with the turbine shut down saved the airframe. Lesson learned.

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

  25. #500
    JohnMac's Avatar
    Join Date
    Oct 2002
    Location
    Leeds, UNITED KINGDOM
    Posts
    1,309
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Jetlegend Mig 29 Fulcrum

    Hi Rob, Are you sure that these power lines get noticabley warmer during start? If they get hot enough to do that to the hydraulic pipe then the insulation must be degrading. This would mean thes cables are way undersize. What current draw are we talking about on a Kero strtengine any way?


Page 20 of 25 FirstFirst ... 101819202122 ... LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
All times are GMT -6. The time now is 10:55 AM.

SEO by vBSEO 3.6.1 ©2011, Crawlability, Inc.