RocketAviator Posted September 9, 2013 Report Posted September 9, 2013 Need INPUT...ASAP on battery replacement recommendations! The shop working on my Rocket is saying that I need 2 new batteries (in the tail section & hard to get to) the current batteries were installed in 7/2010. I never had any problems with the batteries but they are reporting that after charging they won't start the engine.... They have quoted 2 each G-35 batteries and my cost is $245.94 each with acid. (don't know if that includes labor but if it is like the other items I doubt it...). They have also asked if I would be interested in the Concord sealed batteries! What say you? Need input ASAP so I can give them an answer! Thanks in advance, Lacee
jetdriven Posted September 9, 2013 Report Posted September 9, 2013 Those gills are 209$ each from spruce, but they leak and go bad in two years. The Concorde RG-35 or rg-35 AXC with more capacity is what u want, sealed batteries and last 7 years. We got one last year. If your cg is near the forward limit get the AXC if its approved for the M20K
mike_elliott Posted September 9, 2013 Report Posted September 9, 2013 +1 on Byrons recommendation of the Concorde AXC
Marauder Posted September 9, 2013 Report Posted September 9, 2013 +3 On the Concorde series. I am in year 9 of my Concorde RG-35AXC ownership. The one before it lasted 7 years and I replaced it because I thought it was in there too long...
KSMooniac Posted September 9, 2013 Report Posted September 9, 2013 Concorde is the best on the market currently... Gill has been building a lot of bad batteries over the last few years according to everything I've read on various forums and lists.
Schinderhannes Posted September 9, 2013 Report Posted September 9, 2013 I have to replace my Gill G35 as well and like the the idea of installing a sealed battery, but it seems the Concord AXC is 5lbs heavier. Does Concord have a STC for the AXC?
KSMooniac Posted September 9, 2013 Report Posted September 9, 2013 I have to replace my Gill G35 as well and like the the idea of installing a sealed battery, but it seems the Concord AXC is 5lbs heavier. Does Concord have a STC for the AXC? Yes, and you'll need to update the W&B for it. The non-AXC version is only a pound or two heavier.
OR75 Posted September 9, 2013 Report Posted September 9, 2013 Concord sealed AXC if you don't work it often, consider using a battery minder
N601RX Posted September 9, 2013 Report Posted September 9, 2013 I replaced my Concord AXC when it was almost 8 years old. It would still crank the plane, but was starting to slow down a little.
Skywarrior Posted September 9, 2013 Report Posted September 9, 2013 One of my Gills died after only two years. Replaced it with a Concorde. Too early to say how it will do...
Hank Posted September 9, 2013 Report Posted September 9, 2013 I put in my current sealed Concorde in 2008. So far, so good. I had serious cranking troubles and rebuilt the carb and the SOS system last fall, so I no longer crank and crank and crank. Still a good battery. There are two available, I bought the one with higher cranking amps. Sorry, don't remember the model. It was $250+.
DAVIDWH Posted September 9, 2013 Report Posted September 9, 2013 After your new Concord's are installed, don't forget your new "Sky-Tec" Flyweight starter. Those blades will now be nothing but a blur on start-up. No more anxiety on hot starts with that combination.
RocketAviator Posted September 9, 2013 Author Report Posted September 9, 2013 Many thanks, Two Concorde AXC on their way to the A&P shop!
DrBill Posted September 10, 2013 Report Posted September 10, 2013 You will not go wrong with the Concorde. I replaced mine after 5 years of service and now it is used to start my home generator. This way I can keep an eye on it with a battery minder more often than in the hangar. BILL
FAST FLIGHT OPTIONS LLC Posted September 10, 2013 Report Posted September 10, 2013 Does anyone have a weight and balance program they use to recalculate weigths and print for the POH??? I installed the heavier concorde over the weekend and want to update the weight and balance to reflect the 5 lbs xtra
triple8s Posted September 10, 2013 Report Posted September 10, 2013 I bought a G-35 and it lasted almost 4 years however it puked acid out in my battery box on a VERY regular basis and I followed the instructions to the letter on putting in the acid. No more Gills I have Concorde sealed in the O and yes they are more to replace but ya wanna buy batteries AND battery boxes? or just buy a good battery?
jetdriven Posted September 10, 2013 Report Posted September 10, 2013 Does anyone have a weight and balance program they use to recalculate weigths and print for the POH??? I installed the heavier concorde over the weekend and want to update the weight and balance to reflect the 5 lbs xtra weight x arm = moment total moment / total weight = CG
FAST FLIGHT OPTIONS LLC Posted September 10, 2013 Report Posted September 10, 2013 I know how to do the calculations but I didn't just want to scribble it on the most current weight and balance with a pen. I was looking for one of those spreadsheet type programs that someone probably already created
M20F Posted September 10, 2013 Report Posted September 10, 2013 I installed the heavier concorde over the weekend and want to update the weight and balance to reflect the 5 lbs xtra You need to be an A&P or better to update the W&B.
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