My Micro Review Of Multiplex Micro Jet  
View related threads: (in this forum | in all forums)

Tower Hobbies
Enter up to 4 keywords or Tower stock numbers
Logged in as Guest



Users viewing this topic: none
  Printable Version
More Resources on the
Micro Jet - EP
  • See User Ratings
  • Suggest Compatible Equip.
  • Check for Retailers
  • Discussions on this Product


    • All Forums >> Electric Aircraft Universe >> Electric RC Jets >> My Micro Review Of Multiplex Micro Jet
    Page: [1] 2 3 4   next >   >>  

    Login
    Message << Older Topic   Newer Topic >>
    My Micro Review Of Multiplex Micro Jet - 9/29/2003 4:17:51 PM   
    Wingman33


     

    Posts: 82
    Joined: 7/17/2003
    From: Minooka, IL, USA
    Status: offline     		This is the easiest Arf ever to biuld ,EPP foam is a great choice for a biulding medium ,Looks wonderful,Price is rite, BUT************************It flies like a brick it is under powered .a exsesivly short wing gives it scale looks but major flight instability,Im selling this little sucker It says on the box (If you cant stand the heat get out of the kitchen)Hey Guys Your House IS ON FIRE!!!

    Attachments
    Click to see fullsize image.
    Click for fullsize         		Click to see fullsize image.
    Click for fullsize         		Click to see fullsize image.
    Click for fullsize         		Click to see fullsize image.
    Click for fullsize


    < Message edited by Wingman33 -- 9/30/2003 6:47:24 AM >
           Post #: 1

    RE: My Micro Review Of Multiplex Micro Jet - 9/30/2003 6:00:10 PM   
    luc-RCU



    Posts: 256
    Joined: 8/29/2003
    From: Courbevoie, FRANCE
    Status: offline     		lol
    The mpj is a very nice plane but I agree with you there are some drawbacks:
    - Underpowered...cure: I put in it a mega 3 turn
    - glitches on rx: you need the put the antenna out on one side of the wing (or buy a micro-antenna, which I did)
    - Is sensitive in flight: Put the CG on target and don't forget to have both ailerons slightly up at neutral if you want to fly flat.
    - Launching might be a problem: I use my pedal launcher

    After all that, it flies perfectly...

    Attachments
    Click to see fullsize image.
    Click for fullsize


    < Message edited by luc-RCU -- 9/30/2003 6:01:48 PM >

    (in reply to Wingman33)
           Post #: 2

    RE: My Micro Review Of Multiplex Micro Jet - 10/1/2003 3:06:21 PM   
    Wingman33


     

    Posts: 82
    Joined: 7/17/2003
    From: Minooka, IL, USA
    Status: offline     		Very Nicely done! I may have been a little hard on my statments but if they would have made the wing coard juts a little wider they would make a killer jet .

    (in reply to Wingman33)
           Post #: 3

    RE: My Micro Review Of Multiplex Micro Jet - 10/2/2003 7:10:29 PM   
    Wingman33


     

    Posts: 82
    Joined: 7/17/2003
    From: Minooka, IL, USA
    Status: offline     		This Micro jet is giving me more gray hair.the C,G, is on the mark I have been trying 8/500 7/500 8/1100 7/1100a 480 motor a 400 motor, full throttle lanch, 3/4 throttle launch, hard throw ,medium throw.I wish I had a guy from Multiplex with me today!!!!! Im not new at thisand this thing isdriveing me nuts a short trip. Mike

    (in reply to Wingman33)
           Post #: 4

    RE: My Micro Review Of Multiplex Micro Jet - 10/4/2003 10:45:10 PM   
    Wingman33


     

    Posts: 82
    Joined: 7/17/2003
    From: Minooka, IL, USA
    Status: offline     		So what im thinking here is this jet needs more power and less weight check out the 4,8volt motor compared to standerd 400 motors38Watts short af a astro brushless withTWO less cells lighter . what doyou think.??Specifications : From the Graupner site,

    Motor
    ref. Watts
    Volts


    7,2V (GR1794) 35Watts 8,4 Volts
    6V (GR3321) 35Watts 7,2 Volts
    4,8V* (GR3320) 50Watts 6,0 Volts
    astro020 (802) 88Watts 8,4 Volts

    (in reply to Wingman33)
           Post #: 5

    RE: My Micro Review Of Multiplex Micro Jet - 10/7/2003 12:21:51 AM   
    bruff



    Posts: 230
    Joined: 12/24/2001
    From: Gilbert, AZ, USA
    Status: offline     		Flew mine this weekend for the first time. All I can say is WOW!!!. Unlimited vertical and a roll rate that is hard to believe. Now mine is not stock. I have an Astro 020 brushless powered by a TP 2100 LiPo pack in the plane. I have only three flights on it but so far so good.
    Bob

    (in reply to Wingman33)
           Post #: 6

    RE: My Micro Review Of Multiplex Micro Jet - 10/11/2003 11:45:54 PM   
    Wingman33


     

    Posts: 82
    Joined: 7/17/2003
    From: Minooka, IL, USA
    Status: offline     		Finally put this dog out of its misery today.Short wing span makes it a very unstable flier,with the 400 gunther prop and small wing area makes it a underpowered brick. Keep some CA and Kicker handy !! But to all you guys that say you love yours more power to you**** (and it was clocked at 108mph) :O Aw that aint nuthin!! Mine was doing 109mph wene it roll rated its --- rite into the ground WOO HOO!!

    Attachments
    Click to see fullsize image.
    Click for fullsize         		Click to see fullsize image.
    Click for fullsize


    < Message edited by Wingman33 -- 10/12/2003 1:10:28 AM >

    (in reply to Wingman33)
           Post #: 7

    RE: My <span class= - 11/5/2003 10:16:57 AM   
    andyede


     

    Posts: 28
    Joined: 11/2/2003
    From: UK, UNITED KINGDOM
    Status: offline     		Flew mine for the first time yesterday.

    I am using the stock motor and prop. with an Xtra22 ESC and ripmax 8.4V 600mAh NiCad. My building was hampered by a duff speed controller with wanted full throttle all the time. this had the amusing affect of throwing the motor and propeller across the room when i first connected them up. after a replacement everything was fine (apart from the small issue of wiring the motor up the wrong way around....i knew i had to reverse it but for some reason nothing in my brain told me that red to + and black to - was wrong in this case) so set the control throws up approximately as stated in the instructions and went over to my local park. My CoG was very slightly aft but i wasn't too worried about this as i thought i might help the climb out.

    I had tried to get a friend to come and help me throw but ended up in my own so after waiting for all the old giffers to finish walking their dogs around very slowly gave it full power and a good hard chuck!! It seemed to follow a text book ballistic trajectory straight into the ground before i got my hand anywhere near the stick. This cracked the plastic under the nose in a few places but nothing serious to not to be out done by a bi tof foam i picked it up to try again....

    As i was thinking about how to make it abit more successful i remembered reading about putting in some up trim atleast for the first launch so i added about 1 1/2 - 2mm up and tried again. Good hard throw slightly upwards and we were away. It sank but the nose didn't drop and it very soon picked up speed and was climbing away. The motor torque took it ot the left slightly which since i am normally a glider pilot and havn't flown powered for years was abit of a flashback experience.

    I soon realized that where i was flying is not nearly big enough. i was having real trouble trying to not fly over the trees and was still desperately trying to trim the thing. the rearward CG was making it really unstable and i didn't have a very good roll rate. also i was stalling in the turns, i could hear the prop slipping as the airflow broke from the top of the wing. after about a min i thought it might be time to get it on the ground and adjust my control throws so after 2 slow passes got it on the ground alittle way away. I upped aileron control quite abit and elevator alittle, and also puled the battery forward a few mm but couldn't really check it cos of the breeze. Second flight, launched same as before had some more contorl but CG was still aft and was still very unstable. Battery soon died from te 2 flights so brought it in again and went home to charge and play.

    I sorted the CG out, increased the aileron throws some more and sorted out the damage from the first throw. I decided i needed more room so i went up on the south downs (UK) where i had big open fields to fly in and a nice smooth wind. i had 3 more flights up there and didn't change a thing. I was loving it but it got dark too soon to get anymore in.

    This things gets upto speed damn quick when you put the nose down! i soon got the hang of it, sweeping turns and low passes look great but don't try and turn it too tight or you will hear the prop slip and the speed drop. The change in airspeed between up and down wind can interesting when doing proper circuits but most of the time i was dossing about doing fast stuff. There is one thing i do need to change however. i found that it really tries to put its nose down when under power and i had to hold in quite alot to make it climb so i've put a bit of balsa under the rear of the motor to see if that helps but i have yet to fly it again. This is because my speed controller seems to have melted and i havn't got a clue why....very annoying.

    After the first few flights i thought this was going to be a dog to fly but i really enjoyed the last few. i was confident enough to fly low doing turns and circuits ata bout 2/3 throttle and landings were easier than i thought to. Some power s needed but it is still controlable and can be slowed up more than you would think. no power at all is interesting cos it slows down alot and it easy to stall if you pull up to much. i didn't time it but i think i was getting about 4 - 5 min flight times, maybe more. I'll get back when i've had some more flights to see how its still going

    (in reply to Wingman33)
           Post #: 8

    RE: My <span class= - 11/7/2003 7:43:40 AM   
    andyede


     

    Posts: 28
    Joined: 11/2/2003
    From: UK, UNITED KINGDOM
    Status: offline     		i've packed out the back of the motor to give about 5 maybe more degrees of up thrust and its still putting its nose down with power on. i'm thinking of leaving it like that and programming in some up elevator with increased thottle.

    i have to stop flying in a field with big flints in it cos as the landing speeds are quite high its starting to take its toll on the underside of the model...

    (in reply to andyede)
           Post #: 9

    RE: My Micro Review Of Multiplex Micro Jet - 8/9/2004 5:19:02 AM   
    akastan


     

    Posts: 12
    Joined: 12/27/2002
    From: Houston, TX, USA
    Status: offline     		I had launch problems too. I constructed a launch rail from PVC pipe and some sailplane line. It is 6 feet long with the end 6' off the ground and at 30 degree up angle. I give the stick slight up on launch and we are up and flying. I have opted for less battery weight and less air time. Five or six minutes is about all I can handle flying a bullet like this. It is a lot more fun now that I get it airborne every time without a problem

    (in reply to andyede)
           Post #: 10

    RE: My Micro Review Of Multiplex Micro Jet - 8/18/2004 12:47:22 AM   
    SJN



    Posts: 4387
    Joined: 9/28/2002
    From: Copenhagen, DENMARK
    Status: online     		I think the stock setup flys great !

    2 small movies of mine.

    stock sp 400 8 kan 1050 cells. 2 multiplex mx3 servos and schulze 50be esc, jeti 7k rx.

    4mb http://bornholm.adsl.dk/modelfly/files/Microjet/mjtop.WMV

    6mb http://bornholm.adsl.dk/modelfly/files/Microjet/MJVideo.WMV

    (in reply to akastan)
           Post #: 11

    RE: My Micro Review Of Multiplex Micro Jet - 9/3/2004 2:24:49 PM   
    Sparhawk



    Posts: 393
    Joined: 8/19/2002
    From: Dartmouth, NS, CANADA
    Status: offline     		I think one of the best things you can do to get a bit more performance out of it is to ditch that bendy gunther prop and add an adapter and a APC 5x5 or 4.75x4.75 prop. With that prop, handlaunches are still a good throw, but it doesn't dip at all. All at my club fly with that setup on various battery setups and it flies great. The APC prop even reduces some of that cavitation that you hear on a tight turn/loop.

    Spar

    _____________________________

    Oh great are the days my landings = my take-offs....!
    Revver Bro #158

    (in reply to SJN)
           Post #: 12

    RE: My Micro Review Of Multiplex Micro Jet - 9/30/2004 2:03:03 PM   
    Woody 51



    Posts: 1159
    Joined: 6/21/2003
    From: GeelongVictoria, AUSTRALIA
    Status: offline     		Building one at present.

    AXI 2208/20 Brushless, APC 4.75 x 4.75 prop and 3 cell Lipoly (10 C)

    SJN, How do you think this set up will go? I'm thinking of also incorporating a little motor left thrust, to counter the prop torque characteristic at launch.

    < Message edited by Woody 51 -- 9/30/2004 2:05:12 PM >

    _____________________________

    A crash keeps one's opinion of one's flying ability, in perspective.

    (in reply to Sparhawk)
           Post #: 13

    RE: My Micro Review Of Multiplex Micro Jet - 10/30/2004 6:06:42 AM   
    Woody 51



    Posts: 1159
    Joined: 6/21/2003
    From: GeelongVictoria, AUSTRALIA
    Status: offline     		Well, it flies just great with the AXI Brushless and the 4.75 x 4.75 prop on a 3 cell Lipoly.
    Also tried a 6 x 3 prop on a 2 cell Lipoly pack. Slower, but still quite stable and a lot of fun . Seems the main problem lies in that gutless lump of a motor provided with the kit. Go Brushless guys, it needs the extra grunt.

    _____________________________

    A crash keeps one's opinion of one's flying ability, in perspective.

    (in reply to Woody 51)
           Post #: 14