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Moving battery to firewall http://t18.net/thorpforum/viewtopic.php?f=16&t=8143 |
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Author: | James Grahn [ Sun Sep 10, 2017 9:51 am ] |
Post subject: | Re: Moving battery to firewall |
I'm disappointed. I thought we had the drawing thing fixed. I e mailed a follow up two weeks ago and did not hear back. Sorry about that. I'll try him again. The firewall just has three vertical structures. You can see their placement by observing the rivets on the engine side. Of course every airplane is different. Cubes |
Author: | Jeff J [ Sun Sep 10, 2017 11:54 am ] |
Post subject: | Re: Moving battery to firewall |
Not your fault Cubes. I will take the measurements when I am at the shop and have time. I have a couple of customers eager for me to finish work on their planes before I do recreational maintenance on mine. |
Author: | bfinney [ Tue Sep 12, 2017 12:42 pm ] |
Post subject: | Re: Moving battery to firewall |
I can't say about the 580 cause mine has gone awol, i.e. it's not in it's assigned folder and I can't find it in the other stacks of stuff in my office. That said 604 firewall shows the center two stiffners and 528 Fuel tank cradle inst shows the outer stiffners and 515/516 shows the main gear inst. |
Author: | Jeff J [ Tue Sep 12, 2017 4:43 pm ] |
Post subject: | Re: Moving battery to firewall |
Thanks Bruce. I looked at a cradle drawing but I don't think it was the installation. I will have to go back and check. I didn't think about looking at the gear drawings. I am at the shop now and am about to go take direct measurements. |
Author: | fytrplt [ Sun Sep 24, 2017 5:26 am ] |
Post subject: | Re: Moving battery to firewall |
My hoist loop resides in my fly-away tool bag for the same reason. |
Author: | jrevens [ Sun Sep 24, 2017 10:40 am ] |
Post subject: | Re: Moving battery to firewall |
Wow, Jeff... I've never seen a stack of lead like that on an engine. The builder must have been planning to help Bill W. haul some Model T engines in that bird. The hoist loop on my engine can be stored rotated enough to clear with plenty of room... it looks like maybe your case doesn't allow that? |
Author: | Jeff J [ Sun Sep 24, 2017 10:51 am ] |
Post subject: | Re: Moving battery to firewall |
Unfortunately it does not rotate enough. It now lives in the glove box. There is another stack of lead on the front baffle. My desire to lose the lead is why I am moving the battery. |
Author: | Rich Brazell [ Tue Sep 25, 2018 4:35 pm ] |
Post subject: | Re: Moving battery to firewall |
Hummm ? I saw that relay in the Smithsonian when we toured the Thomas Edison exhibit ! RB |
Author: | Bill Williams [ Tue Sep 25, 2018 5:40 pm ] |
Post subject: | Re: Moving battery to firewall |
That's a DPST relay, we used these for years in the Xray machines as power contactors. Probably was used in the builders home air conditioner. I guess necessity is the mother of invention. It's not a sealed contactor and if you had a fuel leak , I think the first thing you would remember is a loud noise. |
Author: | bfinney [ Tue Sep 25, 2018 6:13 pm ] |
Post subject: | Re: Moving battery to firewall |
I had one similar to yours, since been replaced with one from B & C. |
Author: | Jeff J [ Tue Sep 25, 2018 6:21 pm ] |
Post subject: | Re: Moving battery to firewall |
Thanks guys. A local heating and air guy identified it for me a little bit ago. I will pick up a heavy duty battery solenoid from the National Airplane Parts Association on my way through town in the morning. |
Author: | Husky [ Thu Sep 27, 2018 1:22 pm ] |
Post subject: | Re: Moving battery to firewall |
Has anyone used one of these light weight batteries? Recently saw one on an experimental Cub. Shorai LFX21A6-BS12 Lithium |
Author: | jrevens [ Thu Sep 27, 2018 6:58 pm ] |
Post subject: | Re: Moving battery to firewall |
We've all heard or read about the potential safety issues with Lithium batteries in general, as well as some horror stories like when they were first used by Boeing. That being said, LiFe (Lithium Iron) is purportedly one of the safest Lithium types. I know this isn't answering your question, but FWIW I would not consider anything but an EarthX brand battery at this point in time if I wanted to save weight, etc. with a Lithium battery. They have specific ones that are advertised for use in Experimental aircraft, and detailed technical specifications are readily available for their batteries, much more so than the Shorai for instance. They are made in the USA, here in Colorado. This is from their website: Our ETX battery series is fully protected by an integrated battery management system (BMS) that protects the cell’s from over discharge, over charge, short circuit, temperature, plus cell balancing to ensure charge levels are equal. Additionally, our ETX Hundred series aircraft batteries have redundant electronic circuits and battery fault indication. The fault indicator can be connected into your EFIS or wired to a 12volt LED light on your control panel to alert you to the state of charge and state of health of the battery. Their ETX680C has similar specs to the Shorai (just a little more "punch"), but it is also more expensive. They have been pretty well proven in Experimental aircraft now. I don't think I would consider any Lithium-based battery for my airplane unless it had a similar built-in protective BMS. You may already be well aware of all this, but thought I'd just chime in with some food for thought. |
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