This is a fairly easy mod that almost doubles the Super Cub's flying time. First step is to relocate the receiver and then open up the top of the battery box – I used two balsa strips on which to zip-tie the receiver:
I fashioned a plate for the bottom of the battery box out of 1/16" plywood:
I then made up a new two-prong battery connector using Dean's plugs – VERY IMPORTANT – the batteries MUST be connected in parallel – a series connection will double the voltage and probably fry your receiver; the pic below shows how to wire the batteries in parallel – two reds into one, two blacks into one:
The batteries installed and ready to go – what's nice about this mod is that while the weight is increased by the second battery, the CG is not affected, since the original battery was laid flat and now it's just doubled in volume while in the same location:
I found flight times almost doubled; the extra weight does require about 10% more cruising throttle (60% now vs 50% with one battery). The Super Cub handles the extra weight easily – a tribute to its great design.
NOTE: This is a new site so please consider it a "work in progress". I would greatly encourage readers to send in articles for posting on AmpAviators. In contrast to a forum, finding articles of interest will be TONS easier here.
HZ Super Cub Two Battery Mod
Easy mod to almost double flight time
This is a fairly easy mod that almost doubles the Super Cub's flying time. First step is to relocate the receiver and then open up the top of the battery box – I used two balsa strips on which to zip-tie the receiver:
I fashioned a plate for the bottom of the battery box out of 1/16" plywood:
I then made up a new two-prong battery connector using Dean's plugs – VERY IMPORTANT – the batteries MUST be connected in parallel – a series connection will double the voltage and probably fry your receiver; the pic below shows how to wire the batteries in parallel – two reds into one, two blacks into one:
The batteries installed and ready to go – what's nice about this mod is that while the weight is increased by the second battery, the CG is not affected, since the original battery was laid flat and now it's just doubled in volume while in the same location:
I found flight times almost doubled; the extra weight does require about 10% more cruising throttle (60% now vs 50% with one battery). The Super Cub handles the extra weight easily – a tribute to its great design.
NOTE: This is a new site so please consider it a "work in progress". I would greatly encourage readers to send in articles for posting on AmpAviators. In contrast to a forum, finding articles of interest will be TONS easier here.