RCU Forums - Spin 77

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rgreen24

06-09-2007 06:54 AM

Spin 77

Hey Guys my, Spin 99, decided to die again. I called hobby lobby, and they were awesome with customer service. They are sending me a Spin 77 tu run with my Axi 5330/F3A. Would you guys feel comfortable running a Spin 77 with the AXI 5330/F3A. Right now I am pulling 72 max amps. So I am thinking that the 77 would work; any thoughts?

TIA

woodie

06-09-2007 08:48 AM

RE: Spin 77

Quote:

ORIGINAL: rgreen24

Hey Guys my, Spin 99, decided to die again. I called hobby lobby, and they were awesome with customer service. They are sending me a Spin 77 tu run with my Axi 5330/F3A. Would you guys feel comfortable running a Spin 77 with the AXI 5330/F3A. Right now I am pulling 72 max amps. So I am thinking that the 77 would work; any thoughts?

TIA

I ran a Spin 75 with my AXI and have run a Jeti 77 for quite some time. My Jeti 77 has an additional heat sink on it but the Spin 75 did not tho I did not fly it in any high ambient temperatures. Both worked fine for me.

On the Spin controllers, you can set the temperature cutoff limits so you could use that as a level of protection for first few flights....

Woodie

kmp647

06-09-2007 04:07 PM

RE: Spin 77

If you are killing spin99s, why would you want to step down to a 77 ??

rgreen24

06-10-2007 07:09 AM

RE: Spin 77

I don't think I am killing the spin 99. They have been having prblems with that esc all over the county. The first one that I put in the airplane did not work and the second one pooped after two months, with no sign of damadge.

rgreen24

06-10-2007 07:10 AM

RE: Spin 77

What's a good temp Woodie?

woodie

06-10-2007 07:52 AM

RE: Spin 77

Quote:

ORIGINAL: rgreen24

What's a good temp Woodie?

My controllers never get over about 30 degrees above ambient and I know that is well below the default cutoff. I would start at about 160-170 F (I think you set the Spin in C so you will have to do the conversion yourself) that should give you some buffer yet provide a safety limit in case of heat problems.

JimO, what temps have you been seeing on your Spins?

Woodie

OhD	06-10-2007 12:03 PM

RE: Spin 77

Quote:

ORIGINAL: woodie

Quote:

ORIGINAL: rgreen24

What's a good temp Woodie?

I've been seeing temps from 50 to 58 C (122 to 136F). The temperature is measured internal to the ESC so is probably higher than you would measure on the surface of a heat sink. I am flying at about 75F ambient so that rise is about 60F. I'll try to get a surface reading next time out for a point of reference.

Jim O

rgreen24

06-11-2007 11:56 AM

RE: Spin 77

So woodie, you think the 77 should be alright? I ran a Jeti 90 this weekend that a fellow flier lent me, and no hick-ups what so ever. I want to stick with the same equipment, because, I don't want my controller to die on me again. Would you rather go with the Spin 77 or the Jeti 90. Again keep in mind that I am pulling 72 Amps max

TIA

OhD	06-11-2007 03:52 PM

RE: Spin 77

Quote:

ORIGINAL: woodie

Quote:

ORIGINAL: rgreen24

What's a good temp Woodie?

I measured the ESC temp after landing today and measured 85F. At this point the Spin was indicating 29C (84.2F) so there is good correlation. The message is that the contoller cools off from its peak in flight temp during the landing sequence so you need to set the over temp cutoff well above what you measure on the ground after a flight. Your 160-170F sounds like a minimum. I might go 190F.

Jim O

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