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Old Sep 20, 2012, 09:53 PM
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Shadrack's Avatar
Winnipeg
Joined Feb 2002
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You have can motors that want 12V.
LVC will happen if your pack surges below 5.4V even for a second. If both are pulling 12V and you are in parallel then you will be pulling a fair amount of amps out of that ESC.
Best way to measure is a watt meter and see what voltage you drop to when both motors are pulling full throttle, and see the amount of amps TOTAL that you are pulling.
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Old Sep 21, 2012, 05:05 AM
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Bill Glover's Avatar
United Kingdom, Bracknell
Joined Nov 2000
11,003 Posts
Sounds like you have a bad cell in that pack, since it worked before and nothing has changed. But you should be able to tell by looking at the cell voltages - do you have a checker?

Also try the other pack and let us know.
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Old Sep 21, 2012, 10:35 AM
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Denmark, Capital Region of Denmark, Charlottenlund
Joined Jan 2012
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Virgil,

it sounds like ESC overload. Try reducing load by disconnection each motor in turn. That may tell you two things:

1) if one of the motors is bad

2) if the reduced load will let the ESC run

If the motor are alike, but you have a positive on 2), then you must determine if the battery has lost it's guts and the ESC cuts out due to low voltage (try another batt) or if something else is drawing excessive current and the ESc is cutting out due to high current - Possibly a small short somewhere, anything getting warm? Connectors, connections, wires?
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Old Sep 22, 2012, 04:45 AM
Registered User
Kill Devil Hills, NC
Joined Jun 2002
179 Posts
TS-2 Motor cutout

CORRECTION:
I edited my previous post (#8370) to show that the two brushed motors only want 12 AMPS ea. Hence my surprise that their combined draw would overload a 30A ESC. I misled you on this, Shadrack. That was a misstatement. Sorry.

HAPPY ENDING:
I charged the batt from the 6.5V reading up to the normal 8.4V. .....PERFECT !
The 480 long cans are humming contentedly!

Thanks all,

Virg.
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Old Oct 02, 2012, 04:51 PM
United States, WA, Jefferson
Joined Oct 2012
1 Posts
Suped Up Twinstar II

I took the original motors out and replaced them with twin brushless 400's running a 9x6 prop. This plane screams and will fight any wind. At full throtttle on hand launch its hard to hold on to. Running dual 18A ESC's and can get 12-13 minutes with a 20A total current draw on a 2200ma battery. I took it another step further and modified the battery cover to hold a Go-Pro camera and the viseo is pretty cool. Where would I share this?
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Old Oct 04, 2012, 02:14 AM
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PH-SVV's Avatar
Nederland, OV, Kampen
Joined Nov 2010
108 Posts
Nice, What motors did you use?

Twinstar will also take a 5000Mah easily, so you can enjoy longer flights.

This is the right thread, for your video's the fpv sub-forum has a thread.
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Old Oct 04, 2012, 02:48 AM
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Denmark, Capital Region of Denmark, Charlottenlund
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Quote:
Originally Posted by djason05 View Post
I took the original motors out and replaced them with twin brushless 400's running a 9x6 prop. This plane screams and will fight any wind. At full throtttle on hand launch its hard to hold on to. Running dual 18A ESC's and can get 12-13 minutes with a 20A total current draw on a 2200ma battery. I took it another step further and modified the battery cover to hold a Go-Pro camera and the viseo is pretty cool. Where would I share this?
djason,

your fist post - welcome!

I normally just load my videos on youtube or vimeo. If you use the "Insert Link" button to embed the link into your post, you'll get something like this:

FPV Multiplex "EasyTwin" low-light evening (7 min 24 sec)


I purchased my TwinStar for FPV, but I grew so fond of it, that I modded an EasyStar to do the rough jobs instead.
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Old Oct 04, 2012, 09:28 AM
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Shadrack's Avatar
Winnipeg
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You can just copy and past the link into the body of your post.
You don't need to insert the link.
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Old Oct 04, 2012, 09:34 AM
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Denmark, Capital Region of Denmark, Charlottenlund
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Quote:
Originally Posted by Shadrack View Post
You can just copy and past the link into the body of your post.
You don't need to insert the link.
But then you won't get the nice picture pre-view, will you?
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Old Oct 04, 2012, 09:46 AM
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Shadrack's Avatar
Winnipeg
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Yes, for example.
503 meters and 3 1 km sep 28 2012 (19 min 21 sec)
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Old Oct 04, 2012, 11:23 AM
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Denmark, Capital Region of Denmark, Charlottenlund
Joined Jan 2012
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Ok, thanks for getting that straight. And nice video, btw.

But to get back on topic, your TwinStar sounds more like an EasyStar (or Bixler / Skywalker pusher thingy)? And what camera is that? Nice resolution, but no GoPro horizon bending...
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Old Oct 04, 2012, 12:39 PM
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Shadrack's Avatar
Winnipeg
Joined Feb 2002
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Sorry, that was my skywalker video. I had a twinstar that I retired about 3 months ago. Couldn't get the amps down with 2 motors below 9 amps with all the gear. Plus the compartment for all the gear was a lot smaller.
I have video done with the TSII which was a great platform, just once you put in a 5100 battery, plus all the equipment stuffed together, it is harder to separate components for interference sake, etc. That is the gopro hero2 set to 1080P but at the narrower FOV.
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Old Oct 05, 2012, 02:29 PM
Gravity gives sinking feeling
Joined Jun 2011
1,314 Posts
I think you're both right in a way. Until recently you cud only get a link to YouTube but about six month back (?) they changed it to the new format.

Not a YouTube geek, honest

Cheers



Mike_o
How big is your collection now ? Or you dare not share it here in case boss founds out why she is not getting expensive presses any more
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Old Oct 05, 2012, 05:28 PM
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Denmark, Capital Region of Denmark, Charlottenlund
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Quote:
Originally Posted by CurrentDude View Post
I think you're both right in a way. Until recently you cud only get a link to YouTube but about six month back (?) they changed it to the new format.

Not a YouTube geek, honest

Cheers



Mike_o
How big is your collection now ? Or you dare not share it here in case boss founds out why she is not getting expensive presses any more
CurrentDude,

I have behaved and only gotten one more new plane last month (not the predicted Skywalker, though). I am having a lot of fun with my modified EasyStar: The FPV "EasyTwin" has been seriously lost twice and come back now, so I'm considering re-naming it to "Multiplex Boomerang". My TwinStar, however, is still my favourite, but I'm saving her for some less risky missions.

Fleet, in order of appearance:
TwinStar
AXN FloaterJet
MPX PicoCub
(Scratch build pusher jet - dead. CoG problems)
300gr Scratch Foamie
MPX MiniMag
MPX Merlin
400gr Scratch Sopwith
EasyStar 2
EasyStar 1 -> FPV Easytwin w ailer.
FunJet FPV
EasyStar, light build w detachable stabilizers

Video of today's FPV EasyTwin flight just below the sky base, Note the sweet sound of the twin motors

Multiplex EasyTwin FPV cloud base flying (7 min 52 sec)
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Old Oct 07, 2012, 09:28 AM
Gravity gives sinking feeling
Joined Jun 2011
1,314 Posts
^ Hahahahaaaah

And that's your last 6 or 7 months collection ?? Well done

Good vid and I assume it gives you a chance to discover your good and bad flying points.

I'm not into FPV yet but thinking about it... I'd like to see your FPV set ups; plz can you point out which is the specific post(s) I need to look.

I'm thinking of getting a 3-axis gyro either a Guardian or an Ice man gyro
http://www.bluelight-tech.com/BL-3G.htm
http://eagletreesystems.com/guardian/

Do you or anyone else have any comments to make ?

I assume you have a GPS satellite programme / receiver in your FPV or else how did it return to home? Which goggles do you use?

Cheers
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