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Old Feb 23, 2012, 10:35 AM
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Give me a little credit...I never said they where lost on the Rimfire 65cc. After the Turnigy 120 blew there has been a CC160 on the Rimfire 65cc and it still runs strong today. Also at 98 amps a CC160 is not required, a 120HV or even a 80HV with some self control would be fine and well with in manufactures specifications.
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Old Feb 23, 2012, 11:38 AM
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Quote:
Originally Posted by yellowbird2800 View Post
Give me a little credit...I never said they where lost on the Rimfire 65cc. After the Turnigy 120 blew there has been a CC160 on the Rimfire 65cc and it still runs strong today. Also at 98 amps a CC160 is not required, a 120HV or even a 80HV with some self control would be fine and well with in manufactures specifications.
Any ESC manufacture would recommend a 25% overhead to match the paired motor's full potential specification to prevent failures.

Neither the 80HV or 120HV would be recommended by the motor or ESC manufacture due to the high amps the motor can pull, regardless of how gently the user suggested they could operate the throttle.

Credit is given for correctly matching the CC160HV to the Rimfire 65cc, regardless of the recorded amps, which has been proven by your recent reliability.
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Old Feb 23, 2012, 12:13 PM
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I guess we shouldn't go by Castle specifications, they probably don't know what they are talking about any way. Always nice to have an experts opinion though.
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Old Feb 23, 2012, 12:16 PM
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Just ignore him yellowbird.......... we all know your expertise on the matter...
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Old Feb 23, 2012, 12:40 PM
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The older I get the more I realize I don't know as much as I thought I did when I was younger but thanks for the comment Day.
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Old Feb 23, 2012, 01:26 PM
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The 25% overhead is common between many manufactures and not isolated to Castle Creations alone.

Under rating ESC's is a very common mistake, resulting in extreme failures and recklessly endangering others.

Age is no substitute for thorough and informed knowledge of the equipment we operate, which has so much potential to injure or even kill innocent onlockers.
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Old Feb 23, 2012, 01:34 PM
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Are you flying over the crowd or something? We always maintain a safe distance from spectaters, good thing gas engines never quit or people would be getting killed daily. Again thanks for the education.
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Old Feb 23, 2012, 01:51 PM
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Quote:
Originally Posted by yellowbird2800 View Post
Are you flying over the crowd or something? We always maintain a safe distance from spectaters, good thing gas engines never quit or people would be getting killed daily. Again thanks for the education.
Ignorance maybe bliss but accidents have wicked ways of scarring the innocent for life.

You may have seen some photos or videos but it's very different when you learn a member was killed by a model because of an accident.

We all learn something new every day regardless of age.

I wish you continued success and enjoyment with your models.
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Old Feb 23, 2012, 01:56 PM
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I was planning on installing a Rimfire 50cc on a TF Mustang. But now I am thinking of the 65cc and run a 4-blade prop in the 22" range.

Anyone try a 3 blade yet and if so what size?
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Old Feb 23, 2012, 02:07 PM
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So I'm old and ignorant, I've been called worse...I did say thank you.

Picardn,
On my TF P47 I want to switch to the Varoprop 22 inch 4 blade. The motor on it is 180KV on 12S currently running a 23x15 prop. With the Varoprop you can adjust the pitch to get the desired amp draw. Bet is would look great, flight time will suffer some though. Below is a link.

http://www.e-flightline.com/varioprop.htm
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Old Feb 25, 2012, 07:42 PM
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Rimfire 65cc,

On 12cell 65c batteries what is the maximum wattage and amps I can expect? I know they say 7500watts on 15cell. What about 12cell.
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Old Feb 25, 2012, 09:06 PM
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The numbers seem to vary a good bit. With the Xoar 26x12E and only 25C 12S batteries I was getting around 110-120 amps with clamp on meter. I never tried a 26x15 on it because I was concerned the amps would be too high. On a 25X12 it was just under 100 amps. When it was in an open cowl Sukhoi temps were high after an moderate flight, with good cooling motor come down cool. Point is, I find it hard to believe this motor would live very long at its max rated amps, with out melting.
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Old Feb 25, 2012, 09:13 PM
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Have read with much interest the result of searches for amperage and wattage figures for the Rimfire 65cc Motor. Many are saying their research shows up to 6500 watts. In checking Rimfires own figures and reading carefully that is on 15cell batteries.

While having "researched" like many others, I can give you actual figures because I have one and fly one in my 88" EF Yak 54. Weight 21 pounds. 2 TP 5000mah 6cell 65c batteries, CC HV 160.

APC PROPS.

24/12---12cell---96amps---4360watts---5950rpm

25/12.5---12cell---101amps---4562watts---5940rpm

26/15---111amps---4845watts---5490rpm

Don't have any idea what size prop you would have to run to get 6500watts but pretty sure it would dig a deep hole in the ground, or you need a 15cell set up to get those figures.

Hope this helps and clears up your minds some.

Thanks Chuck
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Old Feb 25, 2012, 09:25 PM
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Please understand I am not disputing your finding at all but I am confident with a 26X15 mine would be well over 111 amps, was getting more than that with a 26X12. Can't test since I don't own the plane any more though. Is that with electric props or gas props?
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Old Feb 25, 2012, 09:47 PM
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Yellowbird2800, be cool man, no harm intended, not trying to start anything. I'm only reporting my own findings for everyones own consideration. There can be a wide range of figures between different types of meters. I'm using a E-flite Power Meter which gives a direct flown thru reading un like many clamp on meters that can vary from where they are placed. I have seen wide variation even on the same type of meters. My best friend also has a E-fite Power Meter and on 100amp readings it often varies 10 to 12 amps from mine.
My motors and esc's come down only slightly warm after 7 mins flight times running the 25/12.5 prop. APC make electric plastic props.
Chuck
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