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 Post subject: Re: The XKMM Jag Special
PostPosted: May 15, 2019, 7:05 am 
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so that Pam an I can roll it down into the street and push it around making car noises.
Now THAT event is gonna require video, ya know??? Don't let us down!

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JD, father of Quinn, Son of a... Build Log
Quinn the Slotus:Ford 302 Powered, Mallock-Inspired, Tube Frame, Hillclimb Special
"Gonzo and friends: Last night must have been quite a night. Camelot moments, mechanical marvels, Rustoleum launches, flying squirrels, fru-fru tea cuppers, V8 envy, Ensure catch cans -- and it wasn't even a full moon." -- SeattleTom


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 Post subject: Re: The XKMM Jag Special
PostPosted: May 22, 2019, 12:43 pm 
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Location: worcester county, Massachsetts
GonzoRacer wrote:
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so that Pam an I can roll it down into the street and push it around making car noises.
Now THAT event is gonna require video, ya know??? Don't let us down!


I shall endeavor to make that happen for you.

it is getting very much closer.

last weekend my ratty old HHR insisted that I refurbish the rear brakes, but my son Cody was out, and so I gave him a sketch to work from and he made the mounts for the steering wheel from some 1.5 x .125 mild steel strap.

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I broke out the etching tool so he could sign them...

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then began making vertical adjustments to the wheel position.

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it's almost there. maybe it'll get welded tonight. the possibility exists that the XKMM might be steerable by memorial day...

OMFG that'd be so much win!

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The B-3 build log: http://www.locostusa.com/forums/viewtopic.php?f=36&t=13941

The Jag Special Build Log: http://www.locostusa.com/forums/viewtopic.php?f=36&t=19012


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 Post subject: Re: The XKMM Jag Special
PostPosted: June 24, 2019, 11:00 am 
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Joined: August 12, 2012, 6:38 pm
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Location: worcester county, Massachsetts
It was, and even though it's a month late, here it is, first "drive" of the Jag Special. Enjoy!

https://youtu.be/2vZ3j3ufXHU

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The B-3 build log: http://www.locostusa.com/forums/viewtopic.php?f=36&t=13941

The Jag Special Build Log: http://www.locostusa.com/forums/viewtopic.php?f=36&t=19012


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 Post subject: Re: The XKMM Jag Special
PostPosted: June 24, 2019, 3:38 pm 
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Yabba-Dabba-Do, no brakes, now you need new shoes! :mrgreen:

Good job, Rob! Now if you could just get someone in the passenger seat to make vroom-vroom noises while you push you's be done. :wink:

Cheers,

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Damn! That front slip angle is way too large and the Ackerman is just a muddle.

Build Log: viewtopic.php?f=35&t=5886


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 Post subject: Re: The XKMM Jag Special
PostPosted: June 25, 2019, 5:56 am 
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Rob, I think you needed goggles at those "break neck" speeds! You could go blind with all that velocity!

LOL :lol:

Thom


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 Post subject: Re: The XKMM Jag Special
PostPosted: June 25, 2019, 7:49 am 
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BostonWill wrote:
Rob, I think you needed goggles at those "break neck" speeds! You could go blind with all that velocity!
Nahh, if he didn't go blind from late night "activity" in Junior High, he won't go blind from a little wind now... :twisted:

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JD, father of Quinn, Son of a... Build Log
Quinn the Slotus:Ford 302 Powered, Mallock-Inspired, Tube Frame, Hillclimb Special
"Gonzo and friends: Last night must have been quite a night. Camelot moments, mechanical marvels, Rustoleum launches, flying squirrels, fru-fru tea cuppers, V8 envy, Ensure catch cans -- and it wasn't even a full moon." -- SeattleTom


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 Post subject: Re: The XKMM Jag Special
PostPosted: June 26, 2019, 11:48 am 
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Location: worcester county, Massachsetts
JD, was it only Jr. High for you? Amateur.

Anyway, some details on how the steering got so um, steer-y.

After My son made those fine steering wheel mount brackets, I finished welding and bracing them to the dashboard bulkhead tubes.

Boom!

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Even moar BOOM!

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Punto Finale!

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Then, using a length of .75 x .120 wall DOM, I set the angle and length of the intermediate steering shaft which would connect the upper steering shaft from the wheel, to the lower steering shaft at the rack.

Attachment:
cameringo_20190524_164202.jpg
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Bracketry, spline ends, stop collars, and bearings are the same combination of Jetta, Speedway Motors, mild steel and DOM as the B-3, and the brackets are the same in design - tho the lower bracket mounts vertically rather then horizontally, and the upper steering shaft is triumph spitfire with a Jetta steering universal welded on.

Once the intermediate shaft length was set, I made up the shaft weldment out of Jetta spline ends, the aforesaid .75 x .120 wall DOM and some .5 OD x .065 wall ERW as internal doublers.

Weldment parts prepped with generous bevels and plug-weld holes...

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...And ZZZZZZAP!

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Last test fit before welding the brackets in place...

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.

...and then two days later, the upthread viddy took place.

there's more catching up to do here, I'[ll add to the story later today.

Cuz, it's got a fuel tank now. ;-)

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The B-3 build log: http://www.locostusa.com/forums/viewtopic.php?f=36&t=13941

The Jag Special Build Log: http://www.locostusa.com/forums/viewtopic.php?f=36&t=19012


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 Post subject: Re: The XKMM Jag Special
PostPosted: June 26, 2019, 2:52 pm 
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Joined: August 12, 2012, 6:38 pm
Posts: 1935
Location: worcester county, Massachsetts
So anyway...

a year ago, about - July 2nd, 2018 to be exact - this JAZ products 16 gallon Pro-street fuel tank showed up at my door, and I set about mocking it up in about where it was supposed to go...

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...fast forward 11.75 months, and I found it time to finally build up the tail section and mount the fuel tank in there.

Back up on the jacks we go, and get everything leveled up...

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...then take the tail section top frame angles from the drawing, mitre the tubes (1.28 x .083 wall ERW, like most of the rest of the chassis), and use my proven concrete-blocks-on-the-floor method to weld the top tail frame into it's initial shape...

Attachment:
cameringo_20190610_194330.jpg
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...leaving the outer legs overly long so the top frame can be placed and given and initial centering and set at the drawing distance.

Attachment:
cameringo_20190610_201500.jpg
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Distance set, lop the legs off to a more reasonable length simply for ease of working. Set up the framing square on the CL and do a precise centering and alignment at distance.

Attachment:
cameringo_20190611_194015.jpg
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Once you're sure of the placement - and unfortunately I don't have any pics of this, trust me, it was epic - clamp the leg ends and scribe the cut line from underneath. Cut the legs at the lines with some absolutely heroic chopsaw work, realign, center and level, and weld the top frame into place.

Attachment:
cameringo_20190611_204747.jpg
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Using the chassis as a build table, construct the tail frame that defines the very back end of the chassis.

Attachment:
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Weld that up, and use two lengths of tubing stock to align and clamp it into place at the back of the chassis. Measure, center, level, align, etc...

Attachment:
cameringo_20190612_193330.jpg
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Weld the tail frame in place, and then cut - freehand, with the recipsaw - compound miters like a F@cking BOSS to mate the angled bottom outer tail tubes to the chassis and tail frame.

Attachment:
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And then, magnets and welding.

Attachment:
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Detail your magnificent welding.

Attachment:
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Did I say cut freehand mitres like a BOSS? Yes, in fact I did. Once more with all the feels!

Attachment:
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...and crush the 12-pic limit.

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The B-3 build log: http://www.locostusa.com/forums/viewtopic.php?f=36&t=13941

The Jag Special Build Log: http://www.locostusa.com/forums/viewtopic.php?f=36&t=19012


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 Post subject: Re: The XKMM Jag Special
PostPosted: June 27, 2019, 11:30 am 
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Joined: August 12, 2012, 6:38 pm
Posts: 1935
Location: worcester county, Massachsetts
Where was I?

Oh yeah.

Cut those burly mitres and then weld the sorry bejeezziss outta those things.

Second mitre, thing of beauty, joy forever, etc...

Attachment:
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angled floor bracing fit by placing tubes against the structure and marking to fit.

Attachment:
cameringo_20190614_160415.jpg
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This is a job for SuperMitreMan!

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All of these two-angle mitres are cut freehand with my Ryobi 18V reciprocating saw. mark it with a sharpie, close one eye, RRZZZZZZ. done. Clean it up on the belt sander, WELD. I got a process, I do.

Some 1.0 X 3.0 X .083 rectangle for wheel well doublers (shown tacked here). The hub housing clears by .5 inch at full travel.

Attachment:
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Later that same evening, the tail section is done - minus some bottom welds that will be done once the chassis is flipped over after building the cowl hoops.

Attachment:
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Then, I laid in a couple tubes to begin figuring out the tank mounting, and found that the sump needed to be about an inch higher...

Attachment:
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The tank is also offset to the passenger side about 1 inch (offset driver weight). The 11-inch distance between the hold down strap recesses around the tank defined the length of this bit of 1-inch angle that made the fwd mount.

Attachment:
cameringo_20190618_195206.jpg
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Weld in a length of 1-inch sq. tube to raise the rear ends of the tank mount tubes - set angled very slightly downward towards the rear to help fuel stay in the sump - and weld it all up.

Attachment:
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Check fit, MINT.

Attachment:
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1-inch x .125 Mild Steel strap for the tank hold-downs. here we see one formed and one yet to be formed...

Attachment:
cameringo_20190619_195633.jpg
cameringo_20190619_195633.jpg [ 1.33 MiB | Viewed 532 times ]


...made from measurements sketched in the build notebook. Getting a bit dirty and dog-eared, that.

Attachment:
cameringo_20190619_195648.jpg
cameringo_20190619_195648.jpg [ 923.73 KiB | Viewed 532 times ]


...and here is my new and improved - and simplified - strap bending tool. Remember that bolted tool made of two lengths of 1.0 SQ bar stock? I'm only ever bending in one direction, and so two bars is overkill, and tightening the bolts evenly was always a pain, and 1.25 .083 wall tube has a bigger external corner radius so...

...magnet a length of 1.25 x .083 wall tube to one vise jaw...

Attachment:
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...and then clobber the 12-pic limit. I do that a lot this build, don't I?

See Below...

_________________
The B-3 build log: http://www.locostusa.com/forums/viewtopic.php?f=36&t=13941

The Jag Special Build Log: http://www.locostusa.com/forums/viewtopic.php?f=36&t=19012


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 Post subject: Re: The XKMM Jag Special
PostPosted: June 27, 2019, 11:43 am 
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Joined: August 12, 2012, 6:38 pm
Posts: 1935
Location: worcester county, Massachsetts
So anyway...

...mark bend lines and clamp the strap material into place, remove magnets so they don't fall off - because they will - and BASH IT WITH A HAMMER. Gud Tymez, yo.

Attachment:
cameringo_20190619_201126.jpg
cameringo_20190619_201126.jpg [ 1.18 MiB | Viewed 532 times ]


Success! Again! Cuz I made TWO!

Attachment:
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cameringo_20190619_202007.jpg [ 1.12 MiB | Viewed 532 times ]


Check fit-y goodnesses.

Attachment:
cameringo_20190619_202057.jpg
cameringo_20190619_202057.jpg [ 1.18 MiB | Viewed 532 times ]


Mark the straps for 5/16-18 bolts, drill said holes, and then match drill the tubes using the straps as drill guides.

Attachment:
cameringo_20190623_123104.jpg
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Crush tubes are not necessary here, 1.0SQ x .125 thick bottom doublers will suffice. (shown prior to welding)

Attachment:
cameringo_20190624_192425.jpg
cameringo_20190624_192425.jpg [ 724.93 KiB | Viewed 532 times ]
.

weld the doublers, cut up some old motorcycle inner tube for tank abrasion abatement, and bolt everything down.

Attachment:
cameringo_20190624_195952.jpg
cameringo_20190624_195952.jpg [ 1.28 MiB | Viewed 532 times ]


DONE.

Next up, Cowl hoops.

_________________
The B-3 build log: http://www.locostusa.com/forums/viewtopic.php?f=36&t=13941

The Jag Special Build Log: http://www.locostusa.com/forums/viewtopic.php?f=36&t=19012


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 Post subject: Re: The XKMM Jag Special
PostPosted: June 29, 2019, 8:42 am 
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Joined: May 19, 2016, 8:46 am
Posts: 34
Location: Chesapeake Va.
Rob

In your drawing of the final look, the car has more of a sprint car tail end. Is this what you will add in the up coming installments?

Won't this put the tail a long way from the rear axle? Just asking for the over all good looks of the design.

Dale


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 Post subject: Re: The XKMM Jag Special
PostPosted: July 1, 2019, 7:50 am 
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Joined: August 12, 2012, 6:38 pm
Posts: 1935
Location: worcester county, Massachsetts
Hi Dale

The tail in the rendering looks longer than it's turning out IRL. it's shorter than the tail overhang on the XJ6 donor. it's something like 26.25 from the vertical structure at the rear of the axle cage, so I think it'll be in proportion with the rest of the body.

so far, this build is following my experience in building the B-3: very close to the drawing in initial construction, but departing from the drawing in areas where the actual building leads in a different direction, or suggests an alternate solution.

I didn't really know how I was going to mount the tank, and so there's nothing in the drawing about that, but once I had the tail built (to the drawing) the solution for the tank mounting presented itself. There's a definite improvisational feel to some of this build, and I really like that aspect.

What's going on now is the fabrication and installation of the various cowl hoops that define the shape of the body top surfaces (my son Cody bent them up this past saturday, using some 3/4 plywood templates I made last week). so far I've got the dash hoop, intermediate dash hoop, and grille hoop installed, and have formed the trunk fwd hoop and tail end hoop.

once those are all installed, braced, and have their panel attachment flanges welded in, I'm going to flip the chassis over and complete a bunch of welds that I've been waiting on since about February. I can weld from underneath in an okay fashion, but the welds I am waiting on are structural and I was to be on top of them for best method.

Also with the chassis upside down, I'm going to do some work to the rear axle cage, to improve installation/removal of the axle, and add some bottom mounting features. in most hot rod or custom installs I see online, the Jaguar rear axle assembly is mounted only by the four 1/2-13 bolts at the top of the differential housing. I'm going to add features on the bottom that will provide attachment points for the 5/16-24 bolts that are on the bottom of the differential, at the inner LCA brackets. In my design, the rear axle is secured in place on both the top and bottom. it ain't gonna go NOWHERE. ;-)

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The B-3 build log: http://www.locostusa.com/forums/viewtopic.php?f=36&t=13941

The Jag Special Build Log: http://www.locostusa.com/forums/viewtopic.php?f=36&t=19012


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PostPosted: July 24, 2019, 10:25 am 
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Joined: August 12, 2012, 6:38 pm
Posts: 1935
Location: worcester county, Massachsetts
So, remember that time one of you guys recommended that I build a chassis rotisserie, and I said "Oh, no, not for me. It would take too much time away from the build..." *snort* Oh, how we laughed!

...and then...

Attachment:
cameringo_20190723_195154.jpg
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...and here's how it got there, in video. in the interest of full disclosure, the audio becomes slightly out of sequence with the video as the film progresses, but it's not crazy, only slightly annoying.

Jag Time in Robb's G'raj! July 23, 2019. The Rotisserie! (Don't mind the out-of-sync audio)
https://youtu.be/lSFXjdajwcc

I've been recording these videos over the last month or so, just using my old LG phone device, and I admit the videography is not optimal in many cases, but you'll get the idea of what I've been doing over the last 3-4 weeks since the last update here.

...And I play the Theme Song live!

Jag Time in Robb's G'raj! June 26 2019, Cowl Hoop Forms, Part One
https://youtu.be/GAd18D2w-ik

Jag Time in Robb's G'raj! June 26 2019, Cowl Hoop Forms, Part Two
https://youtu.be/q4H5kJLtYPw

Jag Time in Robb's G'raj! 6-30-2019, Forming the Cowl Hoops Part 1
https://youtu.be/QV1b-LRJj0M

Jag Time in Robb's G'raj! 6-30-2019, Forming the Cowl Hoops Part 2
https://youtu.be/tUqBrsYq0Ug

Jag Time in Robb's G'raj! 6-30-2019, Forming the Cowl Hoops Part 3 (there's also Parts 4 thru 6, but you can look those up on your own.)
https://youtu.be/P8-JwIiLSuE

Jag Time in Robb's G'raj! 7-1-2019, Even More Cowl Hoops!
https://youtu.be/OL3xVfDA74I

Jag Time in Robb's G'raj! 7-4-2019, Cowl Hoop Lip Flange Fails Part 1
https://youtu.be/CvXLNSzjIwE

Jag Time in Robb's G'raj! 7-4-2019, Cowl Hoop Lip Flange Fails Part 2
https://youtu.be/KFcKMQFQ62k

Jag Time in Robb's G'raj! July 13, 2019. Finishing Cowl hoop lip flanges, adding hood flanges
https://youtu.be/Ke23YyIPCq4

Jag Time in Robb's G'raj! July 16, 2019. Rolling the Jag special out for some pics and exposition
https://youtu.be/ooI5Dlz4fdE

Jag Time in Robb's G'raj! July 18, 2019, Chassis Disassembly
https://youtu.be/rKjz1df-bFM

Enjoy at your own risk.

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The B-3 build log: http://www.locostusa.com/forums/viewtopic.php?f=36&t=13941

The Jag Special Build Log: http://www.locostusa.com/forums/viewtopic.php?f=36&t=19012


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