pink pac man

a mate of mine got a trinity p2k2pro from tower...........and it says it has 30,600 rpm

and my mates has 17,982rpm
and tower says it has 67.7 efficiency and my mates has 56.6 efficiency
and tower says it has 127 power.....my mates has 60
and tower says it has 172 and my mates has 101

wtf is goin on........any1 know why its so crap

link http://www2.towerhobbies.com/cgi-bin...&I=LXAVJ2&P=ML


thanks in advance

Grizzbob

iTrader: (2)

Sounds like one of them was tested on the Robitronics dyno(the one with higher numbers), & the other was likely tested on Fantom's dyno. Trinity made the switch a couple of years ago(though there could still be some of the older motors out there, especially from places like Tower) to the Fantom dyno, & they just test a slightly different way(including the default voltage they test at, the Fantom I think does it at 6 volts, while the Robi's default voltage setting is 7.5, & more volts=more motor power, rpm, etc.). Makes it pretty hard to directly compare, but from my experience, both sound like they're ok, & both should run similarly well, so don't sweat it....

ottoman

iTrader: (13)

And before they used Robi they used Turbo 45's... none of those Dyno's will spit out the same numbers.

2BAD4ALL

In defense of Tower Hobbies they state that those numbers are optimal figures. Numbers will vary between batches. We all know that every production motor isn't the same as the others.

edseb

Tower just sells them. Unless its their brand, than its up to Trinity. And, like some other posts mention, it could be tested a different way; like a different dyno.

Grizzbob

iTrader: (2)

Yes, believe me, I have no doubt that the numbers Tower is quoting is from when Trinity used the Robitronics dyno(I know because I have the Robi dyno myself), & Tower just never bothered to change the numbers in their listing of that motor to reflect Trinity's change.

pink pac man

tower may have said that they will be lower......but they cant be as low as my mate had

Speedo

Because those numbers were from a Fantom dyno. Tower's numbers are from a Robitronics, so it is useless to compare the numbers.

Grizzbob

iTrader: (2)

Right, if you took those 2 motors right now & tested them on the exact same dyno, you'd most likely get almost identical numbers(assuming both are in the same condition). It's not the motors, it's the dyno they're tested on....