I figure the guy already has the ability to charge a standard rx pack if he
has RC gear. Standard rx pack is cheap. Standard rx pack is usually about
600 mAh or so. Small rx packs come around 270 mAh or so.
No need to buy a pricey LiPo cell, possibly pricey low voltage rx, or LiPo
Will a servo run properly on a nominal 3.7 volts?
I would go for the lower dollar solution, myself.
But he said 36" span glider - to my mind, that means he wants an all-up
weight of 6 oz or so - gonna be tough to do that with a 3.2 oz battery.
Not sure what setup he's actually using. I'd be using a small rx (around 9
gm - there are several available) and a couple of ~4 gm servos (never have
the courage for single-channel). I'd probably use a little 2 cell 145 mah
lipo, partly because I have a couple of them lying around. And a little
brushed motor speed control, with no motor, to let me use the lipo with the
rx. He probably doesn't have the lipo, chargers, etc lying around, but a
4C100 nicad pack would work just fine with a little rx & servo, if he has a
way to charge it.
"Is there such thing as too much of a bad thing?" - Tripping the Rift
From FMA Direct: https://www.fmadirect.com/site/fma.htm?body=Store
M5 Sub Micro Low Voltage Receiver
Part Number: 805FM72LV
Full range, full performance.
Low voltage. Operates from 2.7 to 8VDC. Can be powered by a single Lithium
Polymer (LiPo) cell or 3 to 5 cell NiCd/NiMH pack.
1.25mm connectors for plug-in compatibility with FMA's LiPo single cell
packs, Super 9LV electronic speed control and PS20LV low voltage sub-micro
Dual conversion, narrow band. Can be used with any FM PPM transmitter.
Digital filtering improves noise immunity.
Last good frame hold stabilizes servos when interference is present.
Available with either negative shift (for Futaba, Hitec transmitters) or
positive shift (for JR, Airtronics transmitters).
Based on FMA's popular M5 receiver, the M5LV is specially designed for low
voltage operation. Ideal for micro and indoor electric-powered aircraft, the
M5LV can also be used with small glow-powered aircraft. Small size, light
weight and low voltage don't compromise the M5LV's performance-it maintains
full range operation and advanced interference rejection.
The M5LV gets its reliability from S.M.A.R.T. (Selective, Microprocessor,
Advanced Radio Transmission) decoding. This technology analyzes each frame,
ignores noise spikes and operates reliably in the presence of strong
interference. The M5LV deals with overwhelming RF noise by sending the last
good frame signal to each servo. As a result, the M5LV can fly through even
deliberate interference with minimal effect on the flight path.
Save! The M5LV is also available with the Super 9LV ESC, PS20LV servos and
1s LiPo pack in money-saving Low Voltage Flight Packs.
For TX type
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