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Old Feb 17, 2011, 05:32 PM
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Build Log
FPV Twin Star II - Build Log

I've edited this build log to reflect my current build status.




Thanks to those who've given me advice on this.

My goal is still to have long flight times and stable flight for HD recording.

Here is the update:

11/06/2011

Current setup (operational):

Motors: HB2815-1400 (Himax)

ESCs: x2 Turnigy Plush 30A Speed Controller

Counter Rotating Prop Setup:

APC 8x6 Thin Electric Propeller
APC 8x6 Thin Electric Pusher Propeller

Battery: ZIPPY Flightmax 5000mAh 3S1P 20C

OSD: Eagle Tree w/RTH

Flight/Record Camera: GoPro HD

Servos: x4 HiTec HS-82MG

Other: LC-Filter for VTx power

POD: ReadyMadeRC pan/tilt for GoPro

VTx: 1.3g or 5.8g

Video Link Antenna: Inverted V (1280) or BluBeam CP (5.8G)

AUW: 63oz.

Energy Consumption: 275mAh/mile (approx.)

Max Flight Travel Distance: 16 miles (approx.)

Max Distance from home flown: 3.8 miles
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Last edited by CaliDave; Jun 16, 2012 at 09:43 PM.
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Old Feb 17, 2011, 06:19 PM
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zaguruinzasky's Avatar
Verona - Italy
Joined Jan 2007
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Ciao Dave,

a 3 blade (same size same pitch) pulls more but is less efficient and it brakes your airplane more when you're idle.

I suggest you to go for the very new TwinStar multiplex motor kit. That's very fine tuned on this airframe. I would go fot that if I had to build a new TS. I've built some TS in the past so if you need just ask but basically the only mod that I found useful is to mount the servo on tail or somewhere on the rear side to compensate the need of tail weight to achieve the correct cg. The TS is rock solid, you don't need any reinforcement, keep it light and easy to build.

Another important thing is counter rotating props, one normal prop and one pusher prop, you won't affect the attitude of the airplane while managing the power.

The fuselage doesn't need to be solid in flight because motors are on wing so I suggest you a solution that allows you to re-open the fuselage anytime you need or at least some doors on the belly.
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Old Feb 17, 2011, 06:21 PM
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Verona - Italy
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Don't buy cheap motors, go for Multiplex or Hyperion or Skorpion, you need vibration free airplane if you fly cmos sensor at fullHD resolution.

Buy parkflierplastic's belly protection for twinstar, it's fantastic.
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Old Feb 17, 2011, 06:31 PM
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I used eflite park480 1020kv motors pulling 10x8 props (the thin eflite ones - 1 counter rotating) and with a 3s 5000mah batt I was getting 30min powered flights. The motors are def too big and were a pain to get mounted, I would use smaller motors if I bought everything again. Also the readymaderc pan/tilt pod works outstanding, love mine. Hs65hb servos were flawless with no jitter on 900mhz .5w
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Old Feb 17, 2011, 06:36 PM
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Quote:
Originally Posted by zaguruinzasky View Post
Don't buy cheap motors, go for Multiplex or Hyperion or Skorpion, you need vibration free airplane if you fly cmos sensor at fullHD resolution.

Buy parkflierplastic's belly protection for twinstar, it's fantastic.
Thanks for the advice, good thoughts for balance, weight and motors. I was looking into this motor/prop/esc combo, but it looks like the multiplex pack is slightly less$.

Any thoughts on the 2? And it doesn't seem that either is a combo of pusher and counter motor... but maybe I'm not totally understand that. But yes, less vibration is desired.
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Old Feb 17, 2011, 06:38 PM
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no no go for multiplex new kit, outrunner, for the pusher thing you just need a pusher prop (inverted pitch), and you need to change the direction of motor rotation by changing position at two of the 3 cables going from the esc to the motor. But you can just start with normal props and make the change later if you feel the need...
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Old Feb 17, 2011, 06:39 PM
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Multiplex catalogue 2011, page 10
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Last edited by zaguruinzasky; Apr 06, 2011 at 03:50 PM.
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Old Feb 17, 2011, 06:41 PM
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2 x PERMAX BL-O 2830-1100 brushless motors # 33 3108
2 x MULTIcont BL-20 SD speed controllers # 7 2232
2 x 8” x 5” propellers # 73 3163
2 x Aluminium firewalls # 33 2607
2 x Propeller drivers and spinners # 33 2335
Cable set for “TwinStar II brushless” power set # 8 5061
Li-BATT eco 3/1-3000 (M6) # 15 723
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Old Feb 17, 2011, 06:42 PM
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galaxiex's Avatar
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Joined Jun 2007
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Quote:
Originally Posted by CaliDave View Post
Thanks for the advice, good thoughts for balance, weight and motors. I was looking into this motor/prop/esc combo, but it looks like the multiplex pack is slightly less$.

Any thoughts on the 2? And it doesn't seem that either is a combo of pusher and counter motor... but maybe I'm not totally understand that. But yes, less vibration is desired.
That (your link) >>>> http://www3.towerhobbies.com/cgi-bin...?&I=LXPVG5&P=7

....is the "old" Power Pack for the TSII.

The "new" Power Pack is in here >>>> http://www.multiplex-rc.de/cms/vorsc...PX_2011_GB.pdf

.... sorry for the huge download...

The new Power Pack is listed near the end of the document.

Edit; oops, too slow... Zaguru beat me to it....
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Old Feb 17, 2011, 06:52 PM
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Quote:
Originally Posted by galaxiex View Post
The "new" Power Pack is in here >>>> http://www.multiplex-rc.de/cms/vorsc...PX_2011_GB.pdf

.... sorry for the huge download...

The new Power Pack is listed near the end of the document.

Edit; oops, too slow... Zaguru beat me to it....
Great update... I find the old power pack all around, however I can't seem to find the new one for sale... do you have a link or is it not released yet?
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Old Feb 17, 2011, 06:53 PM
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just announced , probably it's a matter of days/weeks.. worth waiting.
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Old Feb 17, 2011, 06:55 PM
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What he said... ^^^
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Old Feb 17, 2011, 07:02 PM
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Quote:
Originally Posted by zaguruinzasky View Post
just announced , probably it's a matter of days/weeks.. worth waiting.
Thanks! I won't have the plane until next week so I'll be patient. Gotta get my EZ back in the air after my crash so I'll be busy with that.

Any thoughts on landing gear? Not worth the weight? Maybe just wing tip skids and belly protection? Hard to say if I'll always have a road like landing strip, but that's mostly what I have to land on.

Also, I will be adding either the belly or side hatch. Anyone tried both (not on the same plane) and found one better/easier to deal with? The belly hatch on my EZ is perfect and has been no issue but I know there is more room on the TS2 so maybe it needs to be bigger causing more stress to the frame if on the bottom?
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Last edited by CaliDave; Feb 17, 2011 at 07:07 PM. Reason: adding detail.
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Old Feb 17, 2011, 07:25 PM
Fly FPV, sleep; repeat
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Germantown, MD
Joined Mar 2006
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Belly protection is easy. Just use long strips of packing tape. No need to buy anything else for that. If it wears out, you remove it and put new packing tape on.

My TS2 is flying with justgofly.com 400F motors turning 6x4 props. Gives flight times around 30-35 minutes on a 4200 mAh pack if you manage the throttle well. No vibrations at all either since the props are small. My GoPro video is clean as a whistle.
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Old Feb 17, 2011, 08:55 PM
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USA, IN, Bloomington
Joined Aug 2007
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Use Transparent Scotch Toughtape. Stuff is incredibly tough and sticks great without leaving residue when you peel it off.

Here is my TS2 circuit diagram:

http://www.rcgroups.com/forums/showthread.php?t=1385067

I'm just finishing it now. I forgot to diagram in the 12-volt regulator that ensures a constant 12 volts to the camera.
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