Airsoft Action 07 - Mar 2012 - Page 87

GEARBOX AEG’S DRIVING FORCE BATTERIES Baz Collins explains how to get the best from powerful LiPo batteries A ll AEGs have gearboxes. They are similar to the gears on a bike or car, driving a piston back and forth to push the air out through the hop and expel the BB from the barrel. But what if you want things to go faster? In the past issues we have discussed the amazing abilities and potential of using LiPo (Lithium Polymer) batteries; this time we will look at the upgrades needed to run the most powerful of these batteries, the 11.1v LiPo. As stated before there are more powerful LiPos than the 11.1v, but this is the main powerhouse battery used by the speed and power freaks out there (like me!). So let’s look at some of the things that will need to be done. First off you’ll obviously need a gearbox to cannibalise, preferably a complete one. Now in essence all you need to do is make sure your shimming is spot on (gear heights are all raised and lowered to the appropriate levels for the gears to merge correctly), as well as angle of engagement and shortstroking, and that it’s well greased using a good quality machine grease (WD40 won’t work!). Let’s start angle of engagement (AOE): this is where you remove teeth from the rear of the piston (amount can vary) to allow the sector gear the engage correctly. To clarify, most guns come with an uncorrected AOE which can result in stripped pistons www.airsoftactionmagazine.com 087