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Old Oct 16, 2012, 03:37 AM
Eternal beginner
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France, Alsace, Strasbourg
Joined Jun 2012
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Quote:
Originally Posted by OldOz View Post
Interesting point raised by Serpicus.
The last (of four, one alas RIP now) F45 was definitely not performing as well as the first 3. Maybe something has been changed to make it easier for those stepping up from Coax? - but it's not a battery thing, or anything immediately obvious. I'll try to check into the difference as soon as I catch up on work..
I have 2 F45's, and they also don't fly exactly in the same manner.
It's not that the one flies better then the other, they behave just a little different, mainly in fast forward flight. And this with about the same mechanical settings, and with the same transmitter.

Roland
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Old Oct 16, 2012, 04:02 AM
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Quote:
Originally Posted by OldOz View Post
Interesting point raised by Serpicus.
The last (of four, one alas RIP now) F45 was definitely not performing as well as the first 3. Maybe something has been changed to make it easier for those stepping up from Coax? - but it's not a battery thing, or anything immediately obvious. I'll try to check into the difference as soon as I catch up on work..
Thank you OldOz and thanks to all who have answered.
The point is that I don't exactly remember the throttle at takeoff point, but I feel that it was more reactive.
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Old Oct 16, 2012, 07:57 AM
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The unexpected is here http://www.rcgroups.com/forums/showthread.php?t=1752494
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Old Oct 16, 2012, 07:58 AM
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The unexpected is here http://www.rcgroups.com/forums/showthread.php?t=1752494
Who will be the first to mod it? Brushless anyone?
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Old Oct 16, 2012, 08:57 AM
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Quote:
Originally Posted by slothy89 View Post
Half throttle sounds about right... Do your flight times feel any shorter/longer?
If they are considerably shorter, there is a chance the battery is damaged.
At the moment I've made just few minutes flight, this morning before go to job, and I can't figure the real flight time. But I've tried two batteries and same effect with both.
Now I've watched this video on youtube:
MJX HELI F-45 F645 F-645 (7 min 49 sec)

and seems that even he uses about half throttle to takeoff.
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Old Oct 16, 2012, 08:58 AM
Brent 黑雁
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Canada, AB, Ponoka
Joined Jan 2012
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Quote:
Originally Posted by freezywilly View Post
The unexpected is here http://www.rcgroups.com/forums/showthread.php?t=1752494
Who will be the first to mod it? Brushless anyone?
Looks nice, but I personally have too many helis too fly. I just got a Walkera MiniCP to fly inside and work on 3D. It's about the same size.
It's up to you, freezywilly.
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Old Oct 16, 2012, 10:08 AM
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LOL well I am a glutton for punishment. Have to add another to the list.
With my bad experiences with Walkera they are blacklisted.
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Old Oct 16, 2012, 11:00 AM
Brent 黑雁
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Canada, AB, Ponoka
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Quote:
Originally Posted by freezywilly View Post
LOL well I am a glutton for punishment. Have to add another to the list.
With my bad experiences with Walkera they are blacklisted.
I have heard others say the same thing.
With the three I have been flying, I really have had no issues. I have only crashed my V120 several times, but only required minor repairs when something does break.
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Old Oct 16, 2012, 01:03 PM
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United States, CA, Modesto
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Body Paint

Here is the newest paint job. Masking a little shoddy but cool just the same.
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Old Oct 16, 2012, 01:14 PM
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What to factor in for a brushless main motor?

I don't want to wait on the EH200, and there are a number of brushless motors out there designed for 200 or 300 helis, and I'm confused as to which is better for the F 45 and why?

1. Is there any particular size or weight limitation that needs to be factored in?

2. Does it make any difference if its 4200 or 4500kV?

3. Are there any limitations with what shaft size can be used?

I would want to use a motor which can use the stock 2s 7.4 battery and be mounted with the minimum hassle.....

Thanks in advance,
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Old Oct 16, 2012, 01:40 PM
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Quote:
Originally Posted by Lentar View Post
I don't want to wait on the EH200, and there are a number of brushless motors out there designed for 200 or 300 helis, and I'm confused as to which is better for the F 45 and why?

1. Is there any particular size or weight limitation that needs to be factored in?

2. Does it make any difference if its 4200 or 4500kV?

3. Are there any limitations with what shaft size can be used?

I would want to use a motor which can use the stock 2s 7.4 battery and be mounted with the minimum hassle.....

Thanks in advance,
I have written here about the Park 370 4100kv inrunner and it is great. I am running it on 7.4v and it is plenty zippy and I am getting good run times out of it. I have the 5400kv Park 370 coming in the mail to put in the new F45 I have coming. That will be fun!
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Old Oct 16, 2012, 01:47 PM
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Quote:
Originally Posted by Lentar View Post
I don't want to wait on the EH200, and there are a number of brushless motors out there designed for 200 or 300 helis, and I'm confused as to which is better for the F 45 and why?

1. Is there any particular size or weight limitation that needs to be factored in?

2. Does it make any difference if its 4200 or 4500kV?

3. Are there any limitations with what shaft size can be used?

I would want to use a motor which can use the stock 2s 7.4 battery and be mounted with the minimum hassle.....

Thanks in advance,
To answer your questions:
1. You need to stick with a 24mm diameter
2. no
3. Most shafts are either 2mm or the 2.3mm as with the EH200.

Need to make sure you get an 05 mod pinion for proper gear mesh. I learned that one the hard way. If you stick with the 10t pinion you will not have to modify the chassis for proper fit.
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Old Oct 16, 2012, 02:57 PM
John
Australia, QLD, Brisbane
Joined Aug 2012
542 Posts
Alternative BL motor -
I've ordered this (with a 3mm 10t 0.5 pinion) -
http://www.hobbyking.com/hobbyking/s...dProduct=11884
actually for a different project, but going to try it in the F45 first. Still available, but apparently stock getting low now as well.
The new MJX -
Got to say, I'm a bit disappointed too. Was secretly hoping for a beginner (brushed?) CP, perhaps along the Master lines. Would have been a sure fire seller, and just can't quite see where a big market will be for the 47. But MJX is a TOY company, after all!
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Old Oct 16, 2012, 03:01 PM
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Quote:
Originally Posted by arrowshooter View Post
To answer your questions:
1. You need to stick with a 24mm diameter
I have two motors, but both have a 26mm diameter. Does that mean I won't be able to fit them in?
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Old Oct 16, 2012, 03:07 PM
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Quote:
Originally Posted by Lentar View Post
I have two motors, but both have a 26mm diameter. Does that mean I won't be able to fit them in?
Not without heavy modification to the chassis and motor mount.
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