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ArcticDave

ArcticDave's Legal Eagle XL

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9 hours ago, AzNuggetBob said:

Dave on the subject of living dangerously. when I grew up It was the norm for us back in the 60's to 70"s to ride in the back window of our parents buick or olds waving at people going down the freeway. child seat? no such thing. I think all the kids where doing it back then.


AzNuggetBob

I have 4 brothers and 4 sisters, we would fight to decide who got to ride in the back window, then Dad would settle it by making us take turns!!

I also remember all of us riding in the back of the pickup truck sitting on the sides of the bed/fenders doing 75 to 80 MPH down the interstate, if that happen today my Dad would be in jail!!

Man kids today don't get to have real fun do they???

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We rode in the back of pickups all the time. Everybody did it back then. My little brother and I rode in the back of my step dads pickup all the way from Florida to Oregon. He did have a shell over the back, but it was packed so full of stuff, we only had about the last two feet of bed. We were both pretty sore by the time we got to Oregon! :Just_Cuz_15:

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21 hours ago, Au Seeker said:

I have 4 brothers and 4 sisters, we would fight to decide who got to ride in the back window, then Dad would settle it by making us take turns!!

I also remember all of us riding in the back of the pickup truck sitting on the sides of the bed/fenders doing 75 to 80 MPH down the interstate, if that happen today my Dad would be in jail!!

Man kids today don't get to have real fun do they???

I was a bit smarter then to sit on the side rails at 75-80 Mph.  I sat on the tail gate !   LOL

 

Edited by homefire
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16 hours ago, ArcticDave said:

We rode in the back of pickups all the time. Everybody did it back then. My little brother and I rode in the back of my step dads pickup all the way from Florida to Oregon. He did have a shell over the back, but it was packed so full of stuff, we only had about the last two feet of bed. We were both pretty sore by the time we got to Oregon! :Just_Cuz_15:

Yep,   I got recruited as a  Relief Driver and drove half way to Michigan from Tucson at age 11.  LOL,   Try getting away with that now days !

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I bet you thought I forgot about this project! Lol...it has been a long time since my last post. 
My friend Jim over in NM donated some batteries for the cause. These are over a pound lighter than a normal battery of the same a/hr capacity. I'll make some bus bars today to hook the whole pack together. I have seen videos on youtube of 4 of these batteries starting cars, so they will supply plenty of juice for this engine, even if I run a total loss system. :)

The bottom picture is a size comparison between these cells and a standard 18650 lithium battery. Bow before your master puny weakling! :ROFL:

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Schweet..! What do you need to charge them with, a sub-station..? :ROFL:

Swamp

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Actually the Working Voltages of these cells is as Close and as Safe as you get to Lead Acid Cells.   No Flaming Horror Stories involved with this type of Li Cell Chemistry.  Well each cell can produce something in the range of OVER 100Amps burst so any shorting situation brings Bad Ju Ju and Major Consequences.

Rated 8Ah they should perform  the task at hand and then some.   Crazy amount of energy in those dang things. 

Max Charge voltage on this type is 3.65v per cell.    Running 4 cells in series = 14.6 V...      Any Automotive battery charger putting out the same or a bit less would work just fine. 

The provided BMS ( Battery Management System )  will ensure the cells remain in a Balanced State of Charge within said limits.    Added Bonus, you now have a light weight portable Jump Starting Battery at hand. 

  https://en.wikipedia.org/wiki/Lithium_iron_phosphate_battery

 

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Cigar box battery tray :idea:

 

It's just so funky...I may use it :cowboypistol:

 

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Just don't smoke them   :ROFL:

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I could see that being mistaken for a home made IED.

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50 minutes ago, chrisski said:

I could see that being mistaken for a home made IED.

I know! :25r30wi:

Showed it to my gf and that was the first thing she said :laught16:

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Dave I have to say you take building stuff yourself to a whole new level. I think you could crank a diesel truck with that battery.
:thumbsupanim AzNuggetBob
 

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You could not get on an airplane with it but it goes on your airplane. Go  figure. :idunno:

Duct tape it to your chest for Halloween. Scream "aLAHU aKBAR!" for no reason. It'll be a hoot.

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On 1/26/2019 at 11:59 PM, AzNuggetBob said:

Dave I have to say you take building stuff yourself to a whole new level. I think you could crank a diesel truck with that battery.
:thumbsupanim AzNuggetBob
 

Thank you Bob. Good to see you back. :worship:

20 hours ago, Bedrock Bob said:

You could not get on an airplane with it but it goes on your airplane. Go  figure. :idunno:

Duct tape it to your chest for Halloween. Scream "aLAHU aKBAR!" for no reason. It'll be a hoot.

Nah...I'll take a pass this round, but I'll lend it to you, if you want to go first. :inocent:

 

I can't take the credit for this new technology. Our resident electronics whiz Homefire has been the brains behind the electrical stuff.

We did find an unacceptable flaw in the first design. Those particular style of lithium batteries don't perform well in series. Slight differences in capacity make for mismatched charging, even with a battery management device. The lowest performing cell dictates the charge of the rest of them...losing a lot of amp hours in the process. We are currently experimenting with a different style of lithium battery that should be more stable. The lithium battery pack will provide a longer life than a lead acid battery, and a greatly reduced weight.

In the meantime...I cleared space for an indoor workbench. I've also got some stock cut for the tail section. Work begins in earnest again this week.

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15 hours ago, ArcticDave said:

Thank you Bob. Good to see you back. :worship:

Nah...I'll take a pass this round, but I'll lend it to you, if you want to go first. :inocent:

 

I can't take the credit for this new technology. Our resident electronics whiz Homefire has been the brains behind the electrical stuff.

We did find an unacceptable flaw in the first design. Those particular style of lithium batteries don't perform well in series. Slight differences in capacity make for mismatched charging, even with a battery management device. The lowest performing cell dictates the charge of the rest of them...losing a lot of amp hours in the process. We are currently experimenting with a different style of lithium battery that should be more stable. The lithium battery pack will provide a longer life than a lead acid battery, and a greatly reduced weight.

In the meantime...I cleared space for an indoor workbench. I've also got some stock cut for the tail section. Work begins in earnest again this week.

Ya I agree on the charging Dave. I'm not sure about lipo's or lion's but If you include older weaker lead acid,carbon or alkaline batteries with newer stronger batteries the weakest cells  can actually damage the stronger batteries if you discharge the weaker battery(s)all the way to dead.
and of course thats going to happen first and fast if the weaker batteries can only hold lets say 20% of what the 
newer batteries can hold because they discharge evenly. 
AzNuggetBob

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I said I was starting the tail feathers, and look at that...vertical stabilizer all framed up! :)

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1 hour ago, ArcticDave said:

I said I was starting the tail feathers, and look at that...vertical stabilizer all framed up! :)

 

 

2019-01-29 12.30.25.jpg

I am curious about just how you are going to feather in this one joint to the back bone.  

Old Tom

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1 hour ago, Old Tom said:

I am curious about just how you are going to feather in this one joint to the back bone.  

Old Tom

Simple answer is I'm not. I'll try for a better shot to show you how that all fits. That piece on the nose is deliberately wider to stand off the fabric from the frame. There is a little rise that I will hit with the sander,  to bring it down to the level of that nose board.

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Ah-ha Watson, you have solved the problem.  But of course you it knew it all the time.  Tks, I just figured you had something up being such a astute craftsman as you are.  :ya:

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I cleaned the fuselage yesterday in preparation for painting. I am will have to hold off on actually doing the painting, as we have rain in the forecast for the next few days.
I ripped some stock for the horizontal stabilizer and built a little jig to cut my 1:15 scarf joints in the table saw. Works pretty good! Tomorrow I will start building the stabilizer.

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Dave , you skills always amaze me......nice going

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