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Old May 11, 2004, 11:44 AM
jrb
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Phasor 45-3 experience; props & watts?

Seems this motor performs a bit different than how it calcs; please list your experience. Specifically looking at a 12 cell trainer application.

From a friend: Jerry “HotLiner”: 14xCP1300 & 12x6 Graupner CAM/Folder – 32amps.
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Old May 11, 2004, 04:22 PM
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In ecalc or motocalc use an rpm/volt constant of 720, you will get more accurate predictions.

I've used it with 16 cells, 11-8 cam nonfolding prop, 39 amps.
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Old May 12, 2004, 12:10 PM
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Phasor 45/3

Hi, I have two of these motors but I consider them to be medium power. Do not use above 11.5x5.5 (plastic) e-prop as the motor will get hot on a sunny day. Using the above prop, it powers my 5 1/2lbs scale jobs with ease, but I wouldn't use any more power than the max cells the leaflet says (16).
There is a wrong number of cells in a table on the motor list, which should be 16 max to keep the curent down to 35amps, cheers Robin Andrew, Birmingham, England








Quote:
Originally Posted by jrb
Seems this motor performs a bit different than how it calcs; please list your experience. Specifically looking at a 12 cell trainer application.

From a friend: Jerry “HotLiner”: 14xCP1300 & 12x6 Graupner CAM/Folder – 32amps.
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Old May 13, 2004, 12:00 PM
jrb
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700?

Searched a bit more here and elsewhere; found a posting listing 720, M & E Calc still list 800.

Finally went to the Jeti website ( http://www.jetimodel.cz/eng/hlavnien.htm ); they list RPM/Volt as 700 for the 45-3 and 1050 for the 30-3 (the 15s probably differ as well).

Using the RPM/Volt listed for the 45-3 as Kv still yields a bit more amps than what Jeti shows in their tabulated data. Note RPM/Volt is not Kv; but some motor folks don’t go the extra step to give us Kv.
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Old May 14, 2004, 05:50 AM
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Jim,
do you have one? I've got one NIB - not trying to sell, but if you need a quick static test, I might could get to that this weekend? I've got every size of APC prop I could try (won them @ SEFF last year).. no, I won't try ALL of them, but if you've got something in mind..
..a
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Old May 14, 2004, 08:37 AM
jrb
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Andy,

Thanks for your offer; but only if its easy.

I don’t have one, and am considering it as a recommendation for a friend’s .40 trainer on 12 cells. It looks like the best “plug and play” solution, and offers some growth (16cells, and even w/GB) over the AXI 412014.

Considering the APC“E” 13x8 or APC“F” 13x7 (w/50mm hub); estimates based on my Calcs and “readings” look like these should pull in the low 30s.

Steve Horney’s reviews are both interesting and a bit confusing; some info was 1st listed as the 45/3 but later listed as having been a 30/3. What read like his last/corrected 45/3 data still seemed like it was 30/3 data – 50+amp w/11x6 on 14cells. Also, he found that like the Jeti 350/500 the Gold 40-3P can be used w/14 cells, note BEC is not used (switch left off).


Jim
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Old May 14, 2004, 09:18 AM
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Ken Johnson flew his Cosmic Wind on the 45-3 with a CAM 11x8 on 14 sub-C's, so a 13" for 12 cells sounds about right. I'll test with some props in the 13" range and get back to you. I have 12-cell packs of zapped RC2400's I can use..
..a
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Old May 14, 2004, 09:42 AM
jrb
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Thanks Andy; that’s a lot better battery than the plan!

Much like the economical “brushed” package I put together for a 40ish trainer ( http://www.rcgroups.com/forums/showp...92&postcount=4 ), the plan for this “brushless” package is to be able to go with two “6 Packs” – RC Car packs.

These packages are helpful for folks growing from cars to planes, or those who look to getting stuff via their LHS; also is a work around for the 8 cell trap.


Jim
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Old May 14, 2004, 11:44 AM
RIP Ric
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I have multiple 6-cell packs of Panasonic 3000mAh NiMH's, also HRSC2600's, that I can use as well. I also have a 12-cell pack of CP1300's that I built for an HPI RS4 car with a 1010/2Y (he he he..) that are good for 30A..
..a
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Old May 24, 2004, 08:41 AM
RIP Ric
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I tested with 12 Panasonic 3000mAh NiMH's - I'd say they're pretty close to a generic car pack. Pack was pretty much empty, just pulled off the shelf, and had 800mAh put into it when I stopped the charge and performed these tests. Used a Jeti 40-3p ESC, the original style designed for the Jeti motors..

APC 13x8E 7600RPM 42A 12V 500W
APC 12x8E 8000RPM 38A 12.2V 460W

Does that help?
..a
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Old May 24, 2004, 09:33 AM
jrb
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Thanks Andy!

Your data and calcs with the revised Kv from the Jeti site are in very good agreement.
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Old Jun 01, 2004, 11:36 AM
jrb
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Thanks again Andy for your 45-3 data. Went a head and put one in a Carl Goldberg Eagle II for a friend.

Before bolting the motor in place I ran it up with a 12x8E and spinner on 12 and got 31amp, 19.9 volts, & 406watts via a Jeti Gold 40-3P. A bit lighter on amps than I expected; can go to a 13x8 if it lacks at all on climb.
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Old Jun 01, 2004, 12:27 PM
RIP Ric
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Neat motor mount. That should be plenty of power for a trainer, and it looks like a bolt-in conversion.
..a
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Old Jun 01, 2004, 02:32 PM
jrb
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I got the mount from my LHS; its by Maxx Products (MPI -- http://www.maxxprod.com/mpi/mpi-29.html#ACC3820 ).

It’s a nice Plug and Play solution for a 40 trainer (maybe an AT as well) allowing BEC with the 3 servos & 12 cells. I’ve read that the 40-3P can be pushed to 14 cell, don’t use the BEC.

Yeah, these days you can have success just bolting up a motor and adding some cell.
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Old Jun 01, 2004, 04:11 PM
RIP Ric
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Marietta, GA
Joined Jun 1999
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My Jeti's won't arm on cell counts higher than rated. I tried to use one on a car on 14 cells - would never arm. On 12, worked fine.
..a
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