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Old Oct 11, 2011, 05:57 AM
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United Kingdom, England, Arundel
Joined Aug 2011
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Hi
Anyone know of anywhere in the world I can buy a spare flybar? Ebay has just about every thing to rebuild one of these super little helis - but can I find a flybar....NO WAY

Thanks
Tony
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Old Oct 11, 2011, 08:30 AM
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Zurich
Joined Apr 2006
3,593 Posts
Just write him [from P. 35 / Post #515] >
Quote:
Originally Posted by xlcrlee View Post
Marcel has such parts here in Switzerland
(his eMail addr. is > Marcel Hauser <marcelhauser@bluewin.ch> )
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Old Oct 11, 2011, 08:44 AM
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correction to the 5888 LIPO weight I posted

Quote:
Originally Posted by djdavies83 View Post
thanks lee, I think I may get away with it as my setup should only weigh about 4g with cam, tx and Lipo.

I'll post a link to the setup I'm looking at when I have more time.
I stupidLee relied on the weight that showed up in my one SWISS-Google search [google.ch]. So last night I actually weighed one of my 5888 LIPOs [w/ wires and mini overcharge PCB].

And .... surprise, surprise .... it weighs about the same as the various LIPOs caall99 found!

Sorry!


But the weights I posted for the totals are correct (I actually weighed them, together because my digital scale is accurate only to one gram, which I could interpolate by adding some known-value weights). And the "2 grams-extra is 2 grams too much" was the result of some actual tests I made.


Lee
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Old Oct 13, 2011, 07:42 AM
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Zurich
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replacement flybar >

Quote:
Originally Posted by LeChef View Post
Hi
Anyone know of anywhere in the world I can buy a spare flybar? Ebay has just about every thing to rebuild one of these super little helis - but can I find a flybar....NO WAY

Thanks
Tony
click and scroll down to find flybar >

http://www.hhq.com.au/store/cart.php...tegory_id=2715



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Old Oct 13, 2011, 12:06 PM
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United Kingdom, England, Arundel
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Lee, once again you have proved to be a life save.
THANK YOU very much

Tony
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Old Oct 13, 2011, 02:11 PM
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Blue Bell, PA
Joined Aug 2002
19 Posts
Can't fly this 5888

This is the second 5888. First one died early and got sent back for exchange.
I cannot get this thing to hover any how I try.
Just yaws wildly and rolls wildly. Flips over or augers in in seconds.

I have read the whole thread and saved all of Lee's posts but can't
get to do any of those things until I can get it to fly for more than
2 seconds.

It also seems completely different each flight so its not like
I can apply what I saw from last flight.

I have done RC flight (planes) for a long time.

I have done some heli.
I have a Parrot AR Drone -- which I realize has much more stabilization!

I have lots of time on coaxial simulator Blade mcx
and can fly it pretty well

Is it too much to ask to get this to hover indoors?

What can I do to fly this 5888?
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Old Oct 13, 2011, 02:19 PM
Power-line attraction pilot
United States, MA, Natick
Joined Jun 2011
520 Posts
Lee,

Thank you for looking up these weights. I do appreciate your efforts. It looks like my FPV setup might infact be WAY to heavy...

If i stripped down the heli like you suggested to get to 39g. I will still be putting about 15grams back on it. So it looks like this birdie won't fly at 54grams...
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Old Oct 13, 2011, 03:01 PM
Power-line attraction pilot
United States, MA, Natick
Joined Jun 2011
520 Posts
Lee,

Another quick question. Could you measure the dimensions of the electric motors?

Thanks
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Old Oct 14, 2011, 08:39 AM
Power-line attraction pilot
United States, MA, Natick
Joined Jun 2011
520 Posts
Is 1.5 cm by 3.0 cm a good estimate or are they quite a bit smaller than that? I would measure them myself if my order for 2 x GT5888 wasn't stuck with USPS... Its been in NJ for 5 days, and that's only a 5 hour drive... i dunno whats up.
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Last edited by caall99; Oct 14, 2011 at 09:07 AM.
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Old Oct 14, 2011, 09:03 AM
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Zurich
Joined Apr 2006
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Quote:
Originally Posted by cozmicray View Post
This is the second 5888. First one died early and got sent back for exchange.
I cannot get this thing to hover any how I try.
Just yaws wildly and rolls wildly. Flips over or augers in in seconds.

I have read the whole thread and saved all of Lee's posts but can't
get to do any of those things until I can get it to fly for more than
2 seconds.

It also seems completely different each flight so its not like
I can apply what I saw from last flight.

I have done RC flight (planes) for a long time.

I have done some heli.
I have a Parrot AR Drone -- which I realize has much more stabilization!

I have lots of time on coaxial simulator Blade mcx
and can fly it pretty well

Is it too much to ask to get this to hover indoors?

What can I do to fly this 5888?
1. with throttle off [zero] and the Tx trims in "neutral", check that the swashplate is horizontal when viewed from front/rear .... and that it is tilted rearward about 5.

2. move the right Tx stick and check that the swashplate follows (throttle off).

3. holding heli tightly in one hand, add some power (left throttle/power stick) and see if the blades are reasonably tracked (one blade not spinning above or below the other: i.e., they follow the same track!).

4. if not tracked, read my posts and TRACK the blades!

5. at 1/3 power (throttle), hold in front of a whitish text-page on a TV or in front of a flourescent light and check the Strobe-Effect to see if both rotors are spinning at about the same speed; if not, use the trim buttons under the left throttle stick (yaw-trim) until both rotors are turning about the same speed.

6. place heli on a smooth surface, add a little bit of power (not enough to lift off!) and check yaw trim.

7. let it try to fly while in your hand (do NOT release).

8. if it feels stable, add enough power to hover (up/down), loosen your fingers a very little, release and propare to catch it quickly (remember to instantly cut power before blades touch anything!).


If you still can't get it to hover, post a video showing the results of EACH of the individual steps 1. - 9. and let us all see so we can properly advise ....


Good Luck!,
Lee
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Old Oct 14, 2011, 09:26 AM
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Zurich
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Quote:
Originally Posted by caall99 View Post
Is 1.5 cm by 3.0 cm a good estimate or are they quite a bit smaller than that? I would measure them myself if my order for 2 x GT5888 wasn't stuck with USPS... Its been in NJ for 5 days, and that's only a 5 hour drive... i dunno whats up.
Google: "mini electric motor MRF-0716"

mini electric motor MRF-0716

Product Details:
Place of Origin Guangdong, China (Mainland)
Brand Name Menghao
Model Number MRF-0716BY
Usage Home Appliance, mobile phone
Certification ROHS, UL, Other
Type Micro Motor
Speed(RPM) 6500RPM
Continuous Current(A) 80MA
Voltage(V) 1.3V
Color Metal Color
Function Driving
Speed Constant Speed
Shape Tubular
Power DC
Protect Feature CW/CCW
Structure Other
Phase Other

I don't have one in front of me here, but they are about 16mm x 6mm (about as long as the end segment of a first finger and a tiny bit wider than a BiC pen or a normal wooden pencil).


Sorry about the weight thing (Gravity is my declared mortal enemy ....)


Lee
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Old Oct 14, 2011, 09:32 AM
Power-line attraction pilot
United States, MA, Natick
Joined Jun 2011
520 Posts
holy crap!!!

thats way smaller than i thought! i found a brushless motor with dimensions of 10mm by 15mm. I guess i need to know the shaft length and diameter, as well as a means to mount the new motor.
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Old Oct 14, 2011, 09:44 AM
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Zurich
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Quote:
Originally Posted by caall99 View Post
holy crap!!!

thats way smaller than i thought! i found a brushless motor with dimensions of 10mm by 15mm. I guess i need to know the shaft length and diameter, as well as a means to mount the new motor.
You'll need to make a new frame as well in order to get the gears to match correctly.

Why not use the 5888 more or less as-is (with my "tuning-tips) to get skills and generally have FUN with .... and then get one of the MANY helis that come RTF with a camera? just a seemingly reasonable suggestion.


Lee
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Old Oct 14, 2011, 09:47 AM
Power-line attraction pilot
United States, MA, Natick
Joined Jun 2011
520 Posts
You are my voice of reason! It is my intent to enjoy the GT 5888 as is... for now. But i would like to be the first to do something new and nearly impossible. I plan to build a quadcopter and plane for my actual FPV endeavors, but like the idea of a micro FPV setup. Nothing is set in stone, and there is a good chance i will abandon this project. In the end, it never hurts to stimulate the mind!
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Old Oct 14, 2011, 12:57 PM
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United Kingdom, England, Arundel
Joined Aug 2011
23 Posts
Has anyone tried charging the battery directly off an Imax6B or similar?

LeChef
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