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JMB MB339 composite 1:6 PNP

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JMB MB339 composite 1:6 PNP

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Old 09-15-2023, 04:52 PM
  #51  
RBTHNTR64
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Default XSRCJETS.com MB339 has arrived!

After three months of nail biting, and some very tense tracking data, my XSRC MB339 arrived undamaged all the way from China. It was very well packed by the manufacturer Wind RC Production to prevent any damage. I was able to watch the production on Facebook live, and was able to request little changes as the production moved forward. I have to get the BTE Reaction finished before I start on this one. It will be powered with a Swiwin 140 with smoke, and controlled by a FrSky X20SE radio system, and Advanced Radio Smooth Flite 16 for stabilization. I will be doing a complete build on this for XSRC to help them with an instruction manual.
Dr. Tom I sent you a message about your panels. Definitely want to add them and the other improvements you have made.
I also have a question about the crinkled thrust tube. Did that happen due to the heat from the larger engine?
In case anyone was wondering, this model is very close to the JMB Jets MB339.

XSRCJETS.com MB339

XSRCJETS.com MB339

Last edited by RBTHNTR64; 09-15-2023 at 05:11 PM.
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Old 09-26-2023, 02:10 PM
  #52  
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The kit comes wtih sticker gauges. thanks to Tom we have an alternative!





Old 05-27-2024, 07:47 AM
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Hi all, do you think would be necesary reforce the landings mount ???

Thanks in advance.
Carlos
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Old 05-27-2024, 07:52 AM
  #54  
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Originally Posted by RBTHNTR64
The kit comes wtih sticker gauges.
Goos job, it looks great!

2 Carlos,
Well better leave it as it is and then reinforce if something gives. But do a few touch and goes to get a feel for it at higher speed and then land if all is ok. And no need to reinforce anything


I would just suggest stro ger JP springs sonce stocl ones are for a lighter model (i have few pics and video woth difference before/after and it is worth it)

Tom
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Last edited by dr.tom; 05-27-2024 at 07:58 AM.
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Old 05-28-2024, 08:17 PM
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I took a landing gear mount out and that was my fault and we fly off grass. But when I went to fix it, there was gaps between the wood pieces with very light glue here and there. I love the plane and if I get another one, I would go through the gear mounts and make sure they have glue everywhere and maybe add some corner supports on under sides.

Behzad
Old 06-04-2024, 05:43 AM
  #56  
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Originally Posted by DUCMOZ
I took a landing gear mount out and that was my fault and we fly off grass. But when I went to fix it, there was gaps between the wood pieces with very light glue here and there. I love the plane and if I get another one, I would go through the gear mounts and make sure they have glue everywhere and maybe add some corner supports on under sides.

Behzad
Its s a great flying plane and I did the same to mine. Some of the gear mounting blocs seem a little light on glue. I found a few gaps that I did not like and filled with hysol. But going through and checking glue joints is part of every build.
thanks,
Tone
Old 06-18-2024, 10:51 AM
  #57  
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Hello all, I have a friend that have problems with the landing gear, make noise but not move, someone had same problem ???

Thanks in advance.
Carlos

CMJETS.com
Old 06-18-2024, 11:16 AM
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No problem here.
Old 06-19-2024, 01:50 AM
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No problem either
Old 06-19-2024, 01:57 AM
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Carlos,
You did not specify if all 3 retracts are acting up like that or only one?
and if it only one try to change its channel in JP controller. Maybe controller is fried and not retract.

if all 3 retracts do not work then troubleshooting can be done with 6V supplied to retract jack, shortly connect 4S NiMh pack in one and other ditection(polarity +/-) and see if it moves.
If it works that way it means that ehole JP controller is fried.

If you can hear grinding sound in retract engine most likeli its reductor gear is stripped.
and should be trplaced.
But since we are talking about JP they have great customrr service and ship parts cheap and fast.

Tom
Old 06-26-2024, 10:25 AM
  #61  
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Hopefully mine is ready to go this Sunday. Thanks for the thread as it's been helpful. Have a swiwin 120 in it.
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Old 07-03-2024, 07:44 AM
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Maiden done along with three more flights, and I coudn't be happier with the performance.
Old 07-03-2024, 07:54 AM
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Bravo!

Did you change CG location from.manual suggested one?
Old 07-03-2024, 09:33 AM
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Originally Posted by dr.tom
Bravo!

Did you change CG location from.manual suggested one?
I didn't have a manual, didn't even now there was one. my cg is 146.5 atm

tried to post the flight and no I don't have ten post

Old 07-03-2024, 09:34 AM
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post
Old 07-03-2024, 09:34 AM
  #66  
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more
Old 07-03-2024, 09:35 AM
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times
Old 07-03-2024, 01:02 PM
  #68  
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Default Mb339 jmb

Great model, flys well, I have a JetCat 100 in mine. C of G 145.
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Old 07-04-2024, 02:00 PM
  #69  
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Default Almost

There
Old 07-04-2024, 02:01 PM
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Originally Posted by Slapnutz
There
2 more till pic
Old 07-04-2024, 02:02 PM
  #71  
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Originally Posted by Slapnutz
2 more till pic
had 5 great flights today
Old 07-04-2024, 02:04 PM
  #72  
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Originally Posted by Slapnutz
had 5 great flights today
number 10 finally
Old 07-04-2024, 02:07 PM
  #73  
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Default Today’s picture and Sundays last flight


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Old 07-04-2024, 04:32 PM
  #74  
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I had to do a few mods and reinforcements to get it where I liked, but the MB flies well. It's fast becoming my daily flier. It flies a bit slower with the tanks but I really love the way it looks.
Thanks,
Tone
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