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Old 06-19-2009, 04:38 PM   #9256
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Originally Posted by edwintklee View Post
that with a 2400mah....try using a 4400 mah....play until your tears flow out.... easily last more than 25 minute....
who's 4400 pack are you using?? I have one of the orion 2400's - but wouldn't mind the little extra runtime
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Old 06-19-2009, 06:29 PM   #9257
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Anyone know where I can buy an old style mini body?
thanks,
Alex
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Old 06-19-2009, 07:34 PM   #9258
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Anyone know where I can buy an old style mini body?
thanks,
Alex
did you mean the Rover Mini Cooper??

tower has 2 versions in stock:
regular - http://www3.towerhobbies.com/cgi-bin...?&I=LXGM13&P=7

Lightweight version - http://www3.towerhobbies.com/cgi-bin...?&I=LXTDR0&P=7

you also have speedtechrc.com - http://www.speedtechrc.com/store/ebp...id=373&id=7390
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Old 06-19-2009, 11:17 PM   #9259
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yes, the Rover mini will do fine.
thanks
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Old 06-19-2009, 11:51 PM   #9260
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yes, the Rover mini will do fine.
thanks
No problem...That's my favorite body as well
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Old 06-21-2009, 08:37 PM   #9261
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Tired of all your mates laughing openly at your 20C Lipos? Sick of being that 'little bit smaller' than what everyone else has got?

Do you want to know what the REAL deal is with C ratings on lipos? Can you really squeeze that bit more punch out of a 25C, or even 30C pack?



Click HERE to read the story.

And..some of you may not like it.
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Old 06-21-2009, 08:41 PM   #9262
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hi guys,

just checking if any 1 had encounter this problems before.

i was using a spektrum pro Rx sr3001 with futaba 3003 servo on my mo3

its use to be ok no problem, but lately, i notice the the servo was unable to get back to its center position, it will take some time to get back like 2 - 3 seconds. which means 1 lap you can get a straight line , 2nd lap you wont get straight line...

i have cross check with other 3 servo (3003) same problem, but if use KO propo servo, the servo will work fine....

i even tested with other spektrum Rx, same problem with futaba servo but no problem with KO servos...

was wondering if the speed controller will have effect on the servos??
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Old 06-21-2009, 08:52 PM   #9263
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Quote:
Originally Posted by tony gray View Post
Tired of all your mates laughing openly at your 20C Lipos? Sick of being that 'little bit smaller' than what everyone else has got?

Do you want to know what the REAL deal is with C ratings on lipos? Can you really squeeze that bit more punch out of a 25C, or even 30C pack?



Click HERE to read the story.

And..some of you may not like it.
However it seemed to neglect that the slightly higher capacity lipos "stretch" the discharge curve hence provide more voltage across the race time. Yes we cant use all the amps provided but the higher voltage should make a difference.

So 4000 lipos should perform better than 3200 lipos and voltage checks that I have done seem to indicate that. I notice on your tests that there were no 4000 lipos in the mix
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Old 06-21-2009, 09:10 PM   #9264
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Tony, you are the king! This confirms everything I suspected.
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Old 06-22-2009, 09:05 AM   #9265
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Quote:
Originally Posted by cannon View Post
However it seemed to neglect that the slightly higher capacity lipos "stretch" the discharge curve hence provide more voltage across the race time. Yes we cant use all the amps provided but the higher voltage should make a difference.

So 4000 lipos should perform better than 3200 lipos and voltage checks that I have done seem to indicate that. I notice on your tests that there were no 4000 lipos in the mix
i too agree that high capacity lipo should give you longer power run time compare to 3200 .....cos i have both...
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Old 06-22-2009, 09:21 AM   #9266
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Quote:
Originally Posted by cannon View Post
However it seemed to neglect that the slightly higher capacity lipos "stretch" the discharge curve hence provide more voltage across the race time. Yes we cant use all the amps provided but the higher voltage should make a difference.

So 4000 lipos should perform better than 3200 lipos and voltage checks that I have done seem to indicate that. I notice on your tests that there were no 4000 lipos in the mix
Very true for voltage, but I think the comments by tony gray are referring to C rating exclusively. You have a good arguement for putting the largest capacity lipo that you can fit in your M03 chassis, however...higher average voltage across your run.
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Old 06-22-2009, 12:37 PM   #9267
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Correct.... our test was purely to establish any 'difference' in C ratings and whether there was an impact on performance.

That's what we did and we've shown there to be virtually none.

Relative performance between different mah packs is another issue altogether.

Remember, we're talking about how the pack performs in a 5/6 min race here. And what a pack does on the bench with a constant discharge load applied is nothing like what it does on the track - which is why we test with the Datalogger - on track.

My gut feeling - assuming a fully charged pack - it won't make any difference at all if its a 3200mah or a 4000mah - within the confines of a normal 5/6 min race.
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Old 06-22-2009, 02:00 PM   #9268
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Quote:
Originally Posted by tony gray View Post
Correct.... our test was purely to establish any 'difference' in C ratings and whether there was an impact on performance.

That's what we did and we've shown there to be virtually none.

Relative performance between different mah packs is another issue altogether.

Remember, we're talking about how the pack performs in a 5/6 min race here. And what a pack does on the bench with a constant discharge load applied is nothing like what it does on the track - which is why we test with the Datalogger - on track.

My gut feeling - assuming a fully charged pack - it won't make any difference at all if its a 3200mah or a 4000mah - within the confines of a normal 5/6 min race.
I'm assuming this holds true for only spec esc racing...
Cause my friend and I used a 4000mah 30C lipo using the Orion Vortex 1.5(same speed), but I pulled away on the straight when I got a TP 5000mah 40C.
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Old 06-23-2009, 03:30 AM   #9269
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Another Great Article Tony!

redbones is that a 1.5t motor?

I believe they say that a difference would probably be a more noticeable with lower turn/higher kv motors.

Question I know the HobbyWing 13T system has been used with great success but I wanted to ask if anyone has tried say a Novak 13.5SS motor in their Mini's?

Only asking since Novak now sells their Havoc System with their SS series Brushless motors. Yes they are still around $50-$60 more then the HobbyWing system but kv rating is close with the HW 13T being 3000kv and the Novak 13.5ss being 3300kv?
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Old 06-23-2009, 03:43 AM   #9270
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Novak is true 540 size though, Hobbywing is actually a 380 can (with big fins) so you can't actually directly compare the kv rating.

And for us here (and in most of the world apart from the US) the Novak system is well over twice the price of the Hobbywing.
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