R/C batteries.


I have been building scale sailing models for many years for collectors
and museums but with the advent of our first grandson I have decided to
build a fully detailed R/C model of the trawler 'Ladysmith' at 1/48
scale for him to take down the local boat pool when he is older which is
only five minutes walk from his house (lucky blighter).
Thing is I only know the basics of R/C and am somewhat confused as to
how long batteries last and motor sizes etc, I have a nice 545 motor and
a slightly used 540 and some other stuff but my need is for battery info
i.e how long would a 12v 1.2 Ah battery power a 545 motor or am I better
off going for a larger battery.
As this is a trawler of 1905 vintage I dont want it taking off like a
Seacat so need to keep the revs in order, what is the best way to do
this and the approximate screw rpm for a 2'' prop with the 545 behind it
for the speed to look realistic?, I am also looking at building a sea
going tug of the 1920 - 40 era later if anyone has any suggestions,
many thanks, Terry
Reply to
Terence Lynock (MSW)
Loading thread data ...
"fully detailed R/C model of the trawler 'Ladysmith' at 1/48" ? = 12" or 36" long? beam? depth of hull? without further detail, I suggest you refer to the sub sections: "Battery care, Chargers & Power Supply.: "Boats, Yachts, Submarines, Warship Combat and Nautical reviews" on my web page, especially
Reviews, Plans, FAQ & Tips, Jet drive.
Billing Model Boats - Construction tips & Paint cross reference FAQ - Ship Models Boating Rope Knots - animated examples Build A Quick Fiberglass Hull - DIY. Fishing Knots & Rigging - animated examples Fitting servos to yachts, boats_ amend Servos to operate 180 or 360 degrees *** How to Sail fast_ Rig tuning by Bob Sterne Model Builder Tips & Tricks - Art of the Model Builder Model testing - instrumentation, scaling laws, test tanks, wind tunnels, experiments Modify 2ch Transmitter to adjust number of turns on Sail Winch Props & Shafts - & many other builders tips.*** RacingSparrow Model Yachts - free plans RC Laser RC Sailboats - Tips and Tricks RC Sailboat FAQ rcboat.com - RC Website for the RC Racer. Home of The Engine Analysis Softwa River boats,Towboats etc. - Old River Bill's RC*** River Boats, Towboats etc - Towboat Joe. Tips, Set Up Info & Projects - Off shore electrics Regards Alan T. Alan's Hobby Model & RC Web Links
formatting link

Reply to
A.T.
The message from "A.T." contains these words:
Hi Alan,
Hull will be 36'' long x 5.75'' beam and 4.5'' depth of hull midships and 3'' keel to waterline approx, weight of the model I have no idea as yet but it will be wooden construction plank on bulkhead. I have a new 540 motor also a 545 motor spare and the plans show a 2'' x 3 bladed prop, I have no idea what rpm the prop should run at or what size lead acid battery to use to best effect and for scale speed, all my R/C tinkerings in the past were pretty hit-and-miss and if things worked properly it was a bonus but need to get this one right,
regards, Terry
Reply to
Terence Lynock (CSD)
I would recommend using a sealed gel cell battery instead of a lead acid battery. They come in a great verity of shapes and sizes and eliminate the mess and danger of acid spillage. Pete
Reply to
thelaws
Suggest you refer to
formatting link
and all the good hints and tips thereon. Use SLA (gellcell) batteries which help with good amp hours and as ballast. ESC & Motors, read up on
formatting link
Alan T. Alan's Hobby Model & RC Web Links
formatting link

Reply to
A.T.

PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.