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Thread: lightweight batteries

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    Registered User battman's Avatar
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    lightweight batteries

    I am curious what battery size people are using, and the weight of such.
    Reason; would a battery weighing 1 1/2 to 3 lbs. be of interest ???

    I am looking for testers on different aircraft - especially rotorcraft- to show reliability and improved performance.
    ( deposit refundable when returned )

    Andy
    lithiumMoto
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    Re: lightweight batteries

    How many amps does it have? The iron lithium batteries are pretty cool compared to the burn hazard of LiPo. Does the battery come with a balance charger?

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    Registered User battman's Avatar
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    Re: lightweight batteries

    amps are variable depending on what your starter needs
    no charger needed

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    Registered User Robby's Avatar
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    Re: lightweight batteries

    'amps are variable depending on what your starter needs' ??!!??

    Of course they are, but that's like saying the circuit only pulls what it needs !!!

    I can put 8 D-cells together and get 12V but it sure won't spin a starter because there isn't enough amps !!

    Are you saying the amps are variable depending on the size of the battery used ??
    If so, fine, but what is the max amperage output of the various
    batteries ?
    If there is only the one size, then what is its max amperage
    output ??

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    Registered User battman's Avatar
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    Re: lightweight batteries

    I can put together a 200A, 300A, 400A, 500A, etc.... pack
    unless u want the xtra capacity beyond what the starter requires....
    It's a choice u have.

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    Re: lightweight batteries

    Ah, that's better - Thank You

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    Re: lightweight batteries

    whats the price warranty!12v 24v ?will it recharge with alternator?will it start my turbine allision t63-720 or is it just go for small engine i might try one on my new 150fi yamaha engine thanks mark

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    Registered User battman's Avatar
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    Re: lightweight batteries

    update to lithium aircraft batteries
    www.lithiumaviationbattery.com
    new pics and pricing
    Last edited by battman; April 23rd, 2011 at 06:10 AM. Reason: update

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    Registered User Daleandee's Avatar
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    Re: lightweight batteries

    Wanted to update this older thread with something from the Pilot's of America site:

    https://www.pilotsofamerica.com/comm...-fires.102016/

    I'm still stuck using an antique Odyssey PC680 in my airplane ...

    Dale Williams
    N319WF @ 6J2
    Myunn - "daughter of Cleanex"
    120 HP - 3.0 Corvair
    Tail Wheel - Center Stick
    Signature Finish 2200 Paint Job
    143.7 hours / Status - Flying

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    Registered User cluttonfred's Avatar
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    Re: lightweight batteries

    Any idea exactly what technology those Aerovoltz batteries use? I checked their site but could not find anything more specific than "lithium." My understanding is that the newer technology lithium iron phosphate (LiFePO 4) batteries are much less likely to have this sort of runaway reaction.
    *******
    Matthew Long, Editor
    cluttonfred.info
    A site for builders, owners and fans of Eric Clutton's FRED

    Voici ce que j'ai fait...vous pouvez en faire autant!
    "This is what I have done...you can do the same!"
    --Henri Mignet (1893-1965)

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    Registered User Xanadrone's Avatar
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    Re: lightweight batteries

    Yes, the latest LiFePo4 technology already allows a good "energetic density" at more abordable prices than the Li-Ion ones and without the risk of firecrackers - ex:
    https://www.ev-power.eu/LiFePO4-spec...3-2V-72AH.html

    That means 0,230 kWh for 1.75 kg weight and 90 USD (without taxes) - say 4 lbs per unit including connectors.
    Practically speaking, for an [ultra]light E-experimental plane, a pack of 15 would assure 3,5 kWh at 48V (13S for RC-freaks ) and a max. discharge rate of 360 amps (5C), weighting 27 kgs (60 lbs) and for "just" about 1.5K USD.

    Two such packs (7 kWh, 54kgs/120lbs) methinks would be just fine for a small one place E-bimotor to fly one hour at 50-60% power - and even double for a glider-style aircraft with good L/D.
    An unlimited number of other combinations would certainly be possible for those unhappy with just 14-15 kW onboard (18-20 HP), such as the use of only one pack for take-off E-power boost and/or emergency use, along with a small IC engine for the level flight. Or other hybrid/small generator solutions etc. etc.

    Btw, the favourable evolution of battery tech seems to be accelerating, and this made me not only sketch, but also calculate a few versions of some viable, simple and most of all affordable E-microlight. One without cross-country attributes for sure (for the time being at least), but perfect for cheapo leisure flights because the +2,000 recharge cycles of the new LiFePo4's would compensate rapidly the batteries cost.

    So, I'll be back soon with the final version (3-views + performance estimations) for your precious aid - meaning constructive criticism, with or without 437 posts about some wrong angle of the winglets - luckilly it doesn't have any.

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