MJX-F45 Single Rotor FP - Page 386 - RC Groups
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Jan 20, 2013, 02:27 AM
John
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Last edited by OldOz; Jan 20, 2013 at 03:17 AM.
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Jan 20, 2013, 02:45 AM
Registered User
asanovrus's Avatar
Quote:
Originally Posted by fauconnier
I have one of each. There is no significant difference. The protocol is not the same, you can't use the transmitter with the other heli. Right now, you will get the best price at Aliexpress, $83 U.S. for the new model, with the small package, a safer way to ship.
This http://www.topstoys.com/new-free-shi...em-p-3532.html (bottom of the page) says that version 2 has gyro lying down while on version 1 it stand up. Is that worth doing incompatible versions?
Jan 20, 2013, 03:00 AM
John
Quote:
Originally Posted by asanovrus
This http://www.topstoys.com/new-free-shi...em-p-3532.html (bottom of the page) says that version 2 has gyro lying down while on version 1 it stand up. Is that worth doing incompatible versions?
What I find interesting is why on earth the BL upgrade kit described should need two versions, irrespective of Version 2 Rx and gyro changes? - as above, old and tired. Maybe someone can enlighten me. .
Last edited by OldOz; Jan 20, 2013 at 03:36 AM.
Jan 20, 2013, 03:54 AM
Scotsman in Germany
tiggertoo1962's Avatar

twitchy servos


Hi guys

Big Bird II arrived yesterday just before I had to go to work. Only had enough time to find out that the charger doesn't work (email sent straight away) and that the heli made a "tsst, tsst, tsst" sound when running on the bench. Thought it might have been flybar strikes caused by slop in the blades, so I shimmed them without any noticable improvement. My thoughts then turned to unbalanced blades maybe having the same effect (strikes) but since I don't yet have fine scales I couldn't check it. Made a vid for analysis below. As can be seen, the flybar looks to be balanced and not hitting the blades.

"tsst, tsst, tsst" noise (0 min 40 sec)


Had a closer look this morning and discovered that the aile and elev servos have their own minds, and start twitching when the battery is plugged in. Happens even before binding with the TX. The noise I heard is obviously the servos twitching when the motor is running.

twitchy servos (0 min 17 sec)


Is there an easy fix for this or do I need to send the heli back as a duffer?

Sorry about the vid quality... took it on my #808 so couldn't see what I was filming

Cheers
Fin
Jan 20, 2013, 04:04 AM
Registered User
Quote:
Originally Posted by asanovrus
You said that heli is ok, but what was the camera?
Camera is ok too, rinsed with clean water, dried with compressed air.
The camera is a 808#16 key chain cam with the B lens.

There is a whole active newsgroup for this camera.
https://www.rcgroups.com/forums/show....php?t=1777846

Regards
Jan 20, 2013, 04:08 AM
Registered User
asanovrus's Avatar
Quote:
Originally Posted by OldOz
What I find interesting is why on earth the BL upgrade kit described should need two versions, irrespective of Version 2 Rx and gyro changes? - as above, old and tired. Maybe someone can enlighten me. .
I notice MJX doing weird things with their products. x200 has incompatible radio with all others(f45, x100, f47). WL radios are all compatible, even camera quad v959 can fly with all others (v911,v912,v929,v939,v949) expect you can't turn on the camera. If I didn't order 2 of f45 and didn't need camera on big heli I would move to WL v912 which is almost the same (a bit smaller) but no brushless and other upgrades available so far. All my other helis will be certainly WL
Jan 20, 2013, 04:14 AM
Registered User
asanovrus's Avatar
Quote:
Originally Posted by Flyor
Camera is ok too, rinsed with clean water, dried with compressed air.
The camera is a 808#16 key chain cam with the B lens.

There is a whole active newsgroup for this camera.
https://www.rcgroups.com/forums/show....php?t=1777846

Regards
I'm amazed how camera and videos could survive after visiting underwater world for some time. Keep on experimenting What next? flying over open fire?
Jan 20, 2013, 04:20 AM
Registered User
Quote:
Originally Posted by arrowshooter

.... You/We are truly an amazing group. (no crying now)

Steve
It is an amazing group, but you still have a partly F45/450 so don't be a stranger

Thanks for the list, I'm tempted to go there also... maybe one day

Regards
Jan 20, 2013, 04:49 AM
Registered User
Quote:
Originally Posted by tiggertoo1962
...
Is there an easy fix for this or do I need to send the heli back as a duffer?
That's strange, maybe the swash plate can't move freely, does it also happen when you disconnect the servos from the swash plate?

Regards
Jan 20, 2013, 04:50 AM
John
Quote:
Originally Posted by Flyor
It is an amazing group, but you still have a partly F45/450 so don't be a stranger

Thanks for the list, I'm tempted to go there also... maybe one day

Regards
Or the 'basic' 450 U/G
- http://www.hobbyking.com/hobbyking/s...dProduct=14571 (frame)
- http://www.hobbyking.com/hobbyking/s...dProduct=11884 (motor)
- http://www.hobbyking.com/hobbyking/s...dProduct=15259 (pinion)
- http://www.hobbyking.com/hobbyking/s...idProduct=4312 (ESC)
- http://www.hobbyking.com/hobbyking/s...dProduct=14665 (battery)

Gives you a BL with a difference: can lift 250g+ payload, and do 45+ kph. Plus - you still have a 'F45', and will qualify for this thread and Arrowshooters new one!
Actually, the whole shebang above is only about 40 bucks dearer than the 'full upgrade kit' a few posts back.
You know you want to, Flyor!
Cheers
John.
Jan 20, 2013, 04:58 AM
Registered User
http://www.hobbyking.com/hobbyking/s...Lipo_Pack.html

Hi, its me again, I am having trouble deciding what batteries to go as an upgrade, does the above link will work on f45 as well?

Can anyone give me a link on what is the best battery for the f45. Having troubles finding them here in the forum.....lots of info though but it makes me more confused....lol.
Jan 20, 2013, 05:09 AM
John
Quote:
Originally Posted by nolivy
http://www.hobbyking.com/hobbyking/s...Lipo_Pack.html

Hi, its me again, I am having trouble deciding what batteries to go as an upgrade, does the above link will work on f45 as well?

Can anyone give me a link on what is the best battery for the f45. Having troubles finding them here in the forum.....lots of info though but it makes me more confused....lol.
This (from memory) is the best for stock f45
http://www.hobbyking.com/hobbyking/s...dProduct=23820
Will require some minor mods to battery holder, but fits well otherwise and has right connectors.
Jan 20, 2013, 05:09 AM
Scotsman in Germany
tiggertoo1962's Avatar
Quote:
Originally Posted by Flyor
That's strange, maybe the swash plate can't move freely, does it also happen when you disconnect the servos from the swash plate?

Regards
Just tried it again. Doesn't twitch any more, but now I have a constant buzzing when I plug the battery in - as though the servo it trying to do something - and have no aile reaction at all to the sticks. Elev servo seems to be OK now, but I think the bird's going back. Something stinks
Jan 20, 2013, 05:09 AM
Registered User
Quote:
Originally Posted by OldOz
Or the 'basic' 450 U/G
- http://www.hobbyking.com/hobbyking/s...dProduct=14571 (frame)
- http://www.hobbyking.com/hobbyking/s...dProduct=11884 (motor)
- http://www.hobbyking.com/hobbyking/s...dProduct=15259 (pinion)
- http://www.hobbyking.com/hobbyking/s...idProduct=4312 (ESC)
- http://www.hobbyking.com/hobbyking/s...dProduct=14665 (battery)

Gives you a BL with a difference: can lift 250g+ payload, and do 45+ kph. Plus - you still have a 'F45', and will qualify for this thread and Arrowshooters new one!
Actually, the whole shebang above is only about 40 bucks dearer than the 'full upgrade kit' a few posts back.
You know you want to, Flyor!
Cheers
John.
Hmm, this caught me alot..... care to share a tutorial how to do this on the f45 please? Thanks.
Jan 20, 2013, 05:09 AM
Frank
Quote:
Originally Posted by tiggertoo1962
Hi guys

Big Bird II arrived yesterday just before I had to go to work. Only had enough time to find out that the charger doesn't work (email sent straight away) and that the heli made a "tsst, tsst, tsst" sound when running on the bench. Thought it might have been flybar strikes caused by slop in the blades, so I shimmed them without any noticable improvement. My thoughts then turned to unbalanced blades maybe having the same effect (strikes) but since I don't yet have fine scales I couldn't check it. Made a vid for analysis below. As can be seen, the flybar looks to be balanced and not hitting the blades.

http://www.youtube.com/watch?v=QPvD9...ature=youtu.be

Had a closer look this morning and discovered that the aile and elev servos have their own minds, and start twitching when the battery is plugged in. Happens even before binding with the TX. The noise I heard is obviously the servos twitching when the motor is running.

http://www.youtube.com/watch?v=eeG0t...ature=youtu.be

Is there an easy fix for this or do I need to send the heli back as a duffer?

Sorry about the vid quality... took it on my #808 so couldn't see what I was filming

Cheers
Fin
Wow Fin,
You got a problem child there,
Try moving the servo wires around, I had a problem something like that after rebuilding my 45 completely
my tail was moving on its own, and I just moved the wire routing, and was all ok again, maybe getting a frequence from the electronics on pcb.

Frank


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