External power pack - R66

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stuartto
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External power pack - R66

Unread post by stuartto » Mon Jul 01, 2019 1:51 pm

Am looking at options to keep in our hangar.
Budget option is two 12V batteries and the connector plug - any idea who supplies this plug to the local Heli trade?
Thanks
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Re: External power pack - R66

Unread post by Tim » Mon Jul 01, 2019 2:26 pm

stuartto wrote:
Mon Jul 01, 2019 1:51 pm
Am looking at options to keep in our hangar.
Budget option is two 12V batteries and the connector plug - any idea who supplies this plug to the local Heli trade?
Thanks
Try your AMO for the MS 3506 female plug. Also, aviation supply suppliers like Spruce should have it. Belaire Aviation at OR Tambo can import Spruce items for you.
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Re: External power pack - R66

Unread post by Arch » Mon Jul 01, 2019 9:43 pm

stuartto wrote:
Mon Jul 01, 2019 1:51 pm
Am looking at options to keep in our hangar.
Budget option is two 12V batteries and the connector plug - any idea who supplies this plug to the local Heli trade?
Thanks
https://www.redboxaviation.com/product- ... wer-units/

If you're taking about truck batteries, that's not the budget option - they boil spectacularly when used on a chopper. Check the link above for dedicated gpu options, but they're not cheap. The start up amps required for a gas turbines by far exceeds the current delivery capability of lead-based batteries.
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Re: External power pack - R66

Unread post by DipStick » Mon Jul 01, 2019 9:54 pm

We used to use 2 truck batteries to dry motor a Cessna caravan, never had any issues. But they might not last as long compared to them being used in trucks.
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Re: External power pack - R66

Unread post by Bront » Tue Jul 02, 2019 2:25 am

Arch wrote:
Mon Jul 01, 2019 9:43 pm
stuartto wrote:
Mon Jul 01, 2019 1:51 pm
Am looking at options to keep in our hangar.
Budget option is two 12V batteries and the connector plug - any idea who supplies this plug to the local Heli trade?
Thanks
https://www.redboxaviation.com/product- ... wer-units/

If you're taking about truck batteries, that's not the budget option - they boil spectacularly when used on a chopper. Check the link above for dedicated gpu options, but they're not cheap. The start up amps required for a gas turbines by far exceeds the current delivery capability of lead-based batteries.
Really? Been using car and truck batteries to start helicopters for over 30 years and never had a problem. Charge them properly, keep the electrolyte topped up and they will last years.
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Re: External power pack - R66

Unread post by Arch » Tue Jul 02, 2019 6:42 am

Bront wrote:
Tue Jul 02, 2019 2:25 am
Arch wrote:
Mon Jul 01, 2019 9:43 pm
stuartto wrote:
Mon Jul 01, 2019 1:51 pm
Am looking at options to keep in our hangar.
Budget option is two 12V batteries and the connector plug - any idea who supplies this plug to the local Heli trade?
Thanks
https://www.redboxaviation.com/product- ... wer-units/

If you're taking about truck batteries, that's not the budget option - they boil spectacularly when used on a chopper. Check the link above for dedicated gpu options, but they're not cheap. The start up amps required for a gas turbines by far exceeds the current delivery capability of lead-based batteries.
Really? Been using car and truck batteries to start helicopters for over 30 years and never had a problem. Charge them properly, keep the electrolyte topped up and they will last years.
A mate fried a farmer's truck batteries starting a jetty, and I cooked two brand new 24v 100ah (parallel connection) batteries starting a squirrel. It's all about the C rating of the battery, and most lead acids aren't designed to dump that much current in such a short space of time. Anyway, the battery supplier will be able to match the correct C rated unit. My point is, it's not just about hooking up to batteries in series to get 24v
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Re: External power pack - R66

Unread post by Ugly Duckling » Tue Jul 02, 2019 7:01 am

I designed and manufactured the sealed lead acid batteries for the Puma, Alouettes, F1, Mirage III, Cheetah, Oryx, Astra/PC7 Mk2 and the KwikStart range of battery GPUs.
I have sent Stuart a PM.
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Re: External power pack - R66

Unread post by Bront » Wed Jul 03, 2019 2:50 am

Arch wrote:
Tue Jul 02, 2019 6:42 am
Bront wrote:
Tue Jul 02, 2019 2:25 am
Arch wrote:
Mon Jul 01, 2019 9:43 pm


https://www.redboxaviation.com/product- ... wer-units/

If you're taking about truck batteries, that's not the budget option - they boil spectacularly when used on a chopper. Check the link above for dedicated gpu options, but they're not cheap. The start up amps required for a gas turbines by far exceeds the current delivery capability of lead-based batteries.
Really? Been using car and truck batteries to start helicopters for over 30 years and never had a problem. Charge them properly, keep the electrolyte topped up and they will last years.
A mate fried a farmer's truck batteries starting a jetty, and I cooked two brand new 24v 100ah (parallel connection) batteries starting a squirrel. It's all about the C rating of the battery, and most lead acids aren't designed to dump that much current in such a short space of time. Anyway, the battery supplier will be able to match the correct C rated unit. My point is, it's not just about hooking up to batteries in series to get 24v
I'm not sure how you managed to do that? The most primitive setup I've ever used was 2 small car batteries connected together with a piece of fencing wire just wrapped around the terminals and a set of jumper leads to the aircraft and that was on a Jetty!!!

Of course if you are going to make up a dedicated starter pack then you should get decent, heavy duty, deep cycle batteries, not just any old thing. But nearly every operator I've ever worked for had a set of 2 decent truck batteries as their battery cart. Buying expensive aircraft specific battery banks just doesn't make sense IMHO. Sure a portable aircraft battery pack is a great idea if you want to carry it with you in the aircraft when going to remote locations but for your home base, no way.

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