chris irvine

Hi all, Good thread - I am putting the finishing touches on a Boomerang 40 with an OS 55AX. I have been flying electric R/C helis since last Xmas and am a self taught slow learner (don't get to go flying enough), so reckon I will get some lessons, at least initially. The local club has some instructors and I feel the fee will be well spent. 

The Lipo I have in mind is a 1000Mah and rated at 16C. I'm thinking this should be fine. I am using an OS 55 AX with a 350Ml capacity tank which apparently gives around 10-12 minutes of flight time. I will check the voltage after the boomerangs maiden flight - this should give me something to measure the rate of battery drain. 

FYI the Outback challenge is held at the CASA sanctioned UAV proving ground in Kingaroy Qld. This "airspace" facility is 30 K's wide, 300K's long and has a flight ceiling of I don't know. There is a connecting flight corridor from Kingaroy airport and the facility is open to organisations both commercial and educational as well as hobbyists. Can't wait to find a suitable airframe to build so I can get up there and do some UAVing The UAV challenge has become a regular annual event with some serious prize money on offer. If anyone in South East Quennsland that is on this forum is interested I would like to get a team together to take their money.  

I am assembling a Boomerang 40 sports trainer as a first plane model. I have been flying R/C helis for a while and have a collection of 7.4v Lipos. I want to use one of these for my on board systems. I know I'll have to regulate the voltage down to 6v - I don't want to go lower than this as cell drain beyond 3v per cell can permanently damage the battery. Am I employing sound thought process on this one? Seems to be a smart way to go as I have battery charging systems around every corner in my office. I know most are using Enerloops or other suitable NiMH setups. What sayeth thee? Chris.