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HelicopterScale Model RC Helicopters › Mini Titam Cobra duration?
06-05-2009 08:05 AM  8 years agoPost 1
Rbush

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Hi,

For a 4 minute 30 second flight on a 2250mah 25c lipo pack running a standard TT 40 amp ESC and motor I'm using 1450mha at 80% power (scale flying) Wooden blades..

This seems high as I'm using less than that on my Trex SE V2 in a 6 minute 30 second flight 2250mah 25c lipo pack at 85% power (3D) Carbon blades

Is my mini Cobra a bit thursty or is this normal because it's a bit heavyer and running wooden blades?

Both models are setup right and have very free gearing.

Thanks,

Rob.

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06-05-2009 02:35 PM  8 years agoPost 2
nemo_uk

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uk

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Hi Rob,

I get about 7 to 8 minutes hovering with my mini titan / cobra. It is flybarless and uses painted Curtis Youngblood Radix blades, stock TT motor and ESC. Batteries are 2170 mAh Flightpower EVO25, 7 to 8 minutes hovering uses about 1700 mAh.

Which pinion are you using ? (I can't remember which one I'm using but I do recall you get several with the kit)

regards,

Tony

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06-05-2009 02:38 PM  8 years agoPost 3
Hoverup

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Golden Gulf Coast - USA

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My setup and durations are nearly identical with Nemo's. It's a great little warrior for fbless.

Cheers - Boyd
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06-05-2009 06:01 PM  8 years agoPost 4
Rogerm069

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New Albany, PA USA

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Definintely should get more time, change your pinion and blades. I increased my times when I went from woodies to CF.

Growing old is mandatory, growing up is optional

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06-05-2009 06:43 PM  8 years agoPost 5
trunkmunki

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Just curious, are you guys running any type of V-bar or anything for the FBL setups?

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06-05-2009 11:40 PM  8 years agoPost 6
Rbush

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I fitted a 13T and got a 4 min flight down to 1200mH. This is getting better. I will try 90% throttle tomorrow and then try again with a set of carbon blades.

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06-06-2009 04:12 AM  8 years agoPost 7
Hoverup

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Just curious, are you guys running any type of V-bar or anything for the FBL setups?
SK-360

Cheers - Boyd
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06-06-2009 04:30 AM  8 years agoPost 8
co_rotorhead

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Centennial, CO, USA

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I'm flying a Scorpion -8 motor with a 12T pinion, Hyperion CF blades. Running my throttle curve at 65 or 70% straight across (can't remember which). I can get 6-7 minutes on a Zippy 2200 3S 20C pack without taxing the battery.

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06-06-2009 10:58 AM  8 years agoPost 9
Rbush

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Is the standard Thunder Tiger brushless Mini T motor inefficient? There does not seem to be many people using them? All mine in the past ran very hot (to hot to hold) untill I fitted a fan to them.

With a fan fitted they are fantastically cool (hardly warm).

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06-06-2009 02:52 PM  8 years agoPost 10
doctordog

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Hong kong

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I want one so beautiful ,which shop can buy fuselages.

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06-06-2009 02:53 PM  8 years agoPost 11
co_rotorhead

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Centennial, CO, USA

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I would try CF blades on your Cobra rather than woods. I'm not sure which woods you're running now, but there are many posts about how inefficient the stock TT woods are (the ones with the holes in them). Lots of complaints about heat and decreased flight times while using them.

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06-06-2009 02:58 PM  8 years agoPost 12
Hoverup

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Golden Gulf Coast - USA

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I want one so beautiful ,which shop can buy fuselages.
Check the hobby shop listings in the HK yellow pages. Here's an example.

http://flying-hobby.com/catalog/ind...th=96_98&page=2

Cheers - Boyd
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06-06-2009 03:23 PM  8 years agoPost 13
Rbush

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Just finished charging from the last 4 minute flight with carbons (6mm out of track), 1050mH put back in, and that was still at 80% power.

Things are moving in the right direction now

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06-06-2009 08:13 PM  8 years agoPost 14
Harshflyer

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Seattle, Wa.

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The stock wood blades are really, really bad. I gained 2 minutes of flight changing them out. I painted a set of Trex blades,325 pros, the red and white ones. They worked very good.

The stock TT ESC failed on my mini Cobra on the third flight. FYI

Still asking why

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06-06-2009 08:17 PM  8 years agoPost 15
Dr Lodge

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Guildford, Surrey - UK

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CF blades are definately more efficient that the woodies, although the woodies aren't bad blades. The standard motor does get quite hot which could be why alot of people suffer bearing failures after some time. I don't think its that inefficient though as I saw little difference in power consumption when I swapped it for a JGF500.

Vibe 90, Vibe 50, Vigor CS x2,
Dyna-x, Knight 503D, Logo 10,
TRex 500, Furion, Gaui EP200

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06-06-2009 09:24 PM  8 years agoPost 16
Rbush

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I painted a set of Trex blades,325 pros
That's exactly what I've been doing with my Align Pro blades today

Matt Black with yellow tips and a silver leading edge (almost finished)

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06-06-2009 10:39 PM  8 years agoPost 17
Rbush

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Finished

From this to this

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06-07-2009 12:20 AM  8 years agoPost 18
Harshflyer

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Seattle, Wa.

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Very nice! Looks great. I like the silver leading edge, great idea.
Those Trex 325 pros are a great blade @ $12.99 .

Still asking why

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06-07-2009 12:25 AM  8 years agoPost 19
Rbush

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$12.99

Try £25 ($40) here in the UK

This Cobra was second hand to me and needed some bits looking at again.
I've spent a little time this evening getting the links set-up spot on and greasing up the spindle (was dry). I'll get the tracking spot on tomorrow and do another 4 minute flight with the new carbon blades and 85% throttle. I'm expecting a much lower amp draw

The last run was 1050mH, so that's about 260 per minute. This would have given me about a 6 1/2 minute flight. But that was then, I'm hoping to be able to get a reasonable 7 1/2 minute flight and still keep well inside 80% of the pack.

I think it will do it now

I've put the Cobra and the T-rex 450 on the scales and found the Cobra is carrying an extra 350g, so that's not going to help, nothing I can do about that!

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06-07-2009 02:39 PM  8 years agoPost 20
Rbush

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O well, another 4 min flight, 1200mH !
13T,
Carbon blades,
85% throttle,
That works out at a 6 minute flight for 1800mH (80% of a 2200 3S-1P)

I guess I'll have to be happy with that.

Thanks for your help guys with pinions, throttle curves and baldes

Rob.

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