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Old 05-16-2019, 03:04 PM
thomaspreston120 is offline
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United States, TX, La Porte
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Help!
Electric Newbie

Hey all you electric guru's out there, I'm brand new to electric planes and need to pick your brains for info on a Great Planes 30cc Avistar that I picked up the other day with a Great Planes Rimfire 1.60 motor. It has no esc, batteries, nothing but the motor and airframe. Any help with suggesting an esc, batteries, adapters, etc, etc. would be sincerely appreciated. Thanks again for any help.
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Old 06-12-2019, 04:58 PM
ron_van_sommeren is offline
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uomo ludens modellesticus
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As a first powertrain the above might be a bit too big/dangerous for an e-newbie Thomas (and for his wallet, and his ego ).

I think it is safer/better/simpler/easier/cheaper/safer to start with a low power plane, motor setup, learning curve and all. To get some e-routine and e-knowledge with a cheap setup and plane?
And get some general e-knowledge. E.g: motorcurrent is proportional to voltage≤ and Kv, usually an eye opener, has burned a lot of batteries, controllers and motors.

E-motors can start all of a sudden, without warning, with full torque available right from zero rpm up to full rpm, merrily hacking away at fingers, limbs and wedding tackle, with unstoppable force.
Motor and/or controller can go up in smoke in an instant (fffffizzzle ... aaaaand gone ), without the warning you get when an IC motor starts to run lean. And once the smoke is out, you can't put it back in.

Vriendelijke groeten Ron
• Without a watt-meter you are in the dark ... until something starts to glow •
e-flight calculatorswatt-metersdiy motor tips&tricksCumulus MFC
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Last edited by ron_van_sommeren; 06-14-2019 at 05:52 PM.
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Old 06-13-2019, 08:02 AM
suds is offline
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indywestrc & viehercfliers
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United States, IN, Zionsville
Joined Jul 2014
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You should be looking at a 80amp high voltage ESC.
Battery options are likely 12S-4000mah (two 6S 4000mah) with a 16x8 or 10S 5000mah (two 5S 5000mah) with a 18x8 prop...my guesses. I like the 12S-4000 setup as it also translates to many of the newer 74-78" 3D style planes while the 10S-5000 more applicable to 2M pattern planes.

Review here for your setup on 10S-5000
https://www.rcgroups.com/forums/show...CGroups-Review
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Old 06-13-2019, 11:52 AM
Rc_jeffreyv is offline
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United States, SC, Seneca
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I would start and stay with 12S(2X6S). There are dramatically more battery options at 6S than 5S. I am in the process of moving to all 6S or 12S planes. Jet EDFs, 30cc and 60cc prop Electrics can all use the same batteries. Simplifies maintaining battery lifecycles, chargers, connectors, etc. I have 1 10S 2M F3A left. Everything else is 6S 5000-6000 packs.
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Old 06-13-2019, 05:37 PM
thomaspreston120 is offline
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Thanks everyone for your replies. This gives me a good idea of what to use as far as batteries etc. and what I'm up against. Thanks again
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Old 06-14-2019, 05:54 PM
ron_van_sommeren is offline
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uomo ludens modellesticus
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near Nijmegen, Netherlands
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Quote:
Originally Posted by thomaspreston120 View Post
... I'm brand new to electric planes ...
Some well-structured reading for rainy/windy days, and some handy e-tools as well. Will save you, and us a lot of questions. Notably the 'what went wrong?' kind of questions Will also prevent you from burning up several controllers and/or motors and/or battery and/or car and/or garage and/or home:
E-flight primer and tools

And pleasepleaseplease, do your RC equipment, wallet, ego, battery, controller, motor, house/garage/car a big favour ... get a watt-meter. It will more than pay for itself, will save you at least one fried motor and one fried controller. Will also help you finding the best setup.
Always keep battery-/-watt-/multi-meter wires short!
too long wires batteryside will kill ESC over time: precautions, solutions & workarounds.
182

Prettig weekend Ron
• Without a watt-meter you are in the dark ... until something starts to glow •
e-flight calculatorswatt-metersdiy motor tips&tricksCumulus MFC
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Old 06-14-2019, 05:57 PM
ron_van_sommeren is offline
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uomo ludens modellesticus
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near Nijmegen, Netherlands
Joined Apr 2009
91 Posts
Without a watt-meter you are in the dark.
Until something starts to glow
Prettig weekend Ron
• Without a watt-meter you are in the dark ... until something starts to glow •
e-flight calculatorswatt-metersdiy motor tips&tricksCumulus MFC
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Last edited by ron_van_sommeren; 06-14-2019 at 07:16 PM.
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