Celerity Quicksilver Sport Coupe (EA racer)

[Functional Artist]

But if you use wood cleats say 1”X1” at the joints there’s plenty of area to screw to. Back off on your sanding pressure if the board is flexing. Let the sandpaper do the work.

Hey Denny,

I drew a pic, for you

See how I was able to use the (2) "stacked" pieces of 1/2" MDF to form a nice round-over-curve

I'm using this compounded-curved, round-over concept, all along the perimeter of the sides

 

[Functional Artist]

What? Wait! I'm gone for a coupla days and yer on to another project?
Has the paint dried on the last one?

Hey T,
Um...yup...I'm am

No Rest for the Wicked

I've been alternating between towing, putting a roof on our home & "my art"

Installing the wooden strips

Lugging 16' panels

* Notice the hole for the vent pipe?

Last panel

** Working on installing the "caps"...now

Now, it looks like this

 

[Functional Artist]

Right body side mold & flat panel covered in (2) layers of 1708, the next morning

* The body side panel is marked for trimming
...which helps with de-molding

Here's the flat panel

Another view

 

[ezcome-ezgo]

So I will ask the question on everyone's mind: Why not make a fiberglass roof? They call it combining your passions.

 

[Wicked_Daddy]

So, A metal roof goes on OVER the existing composite shingle roof by mounting it on wood spars? Didn't know that.

Nice fiber work. Anxious to see this finished!

 

[Edwin Spangler]

So, A metal roof goes on OVER the existing composite shingle roof by mounting it on wood spars? Didn't know that.

Nice fiber work. Anxious to see this finished!

I have an entire roof from 1890 in my attic...

 

[Functional Artist]

So, A metal roof goes on OVER the existing composite shingle roof by mounting it on wood spars? Didn't know that.

Nice fiber work. Anxious to see this finished!

Hey WD,

Yup, "if" the existing roof is only (1) layer
...Ohio law only allows (2) layers of roofing...at a time

The wood strips have several purposes

1.) the strips "space" the steel panels above the roofing shingles
...so, the shingles can't abrade the finish off of the backside (like during thermal expansion & contractions)

2.) the strips get screwed down, with 2 1/2" screws, right into the rafters
...& then, provide a nice-n-wide "nailer" for screwing into, when installing the panels (ta make nice-n-purty lines)

Thanks

I'ma getin' done...what I can get done
...'cause Winter is a comin' fast

 

[Functional Artist]

After doin' some twilight trimmin' on the "nose" & "tail"

I roughly assembled the left side & right sides
...& the "nose" & Tail" pieces
...using the "overlap method" & a few wood screws

The "nose"
* The floorboard (from the flat panel) is just layed in place, for illustrative purposes

The "tail"

 

[Functional Artist]

Body mock-up with "some" wheels "spaced" ~2 1/2" above the workbench

* Hi Ducky

Um...looks like the rear wheel won't clear the "deck" that will be above it

So, I drew in an extension

Drawing of the original plan

The plan was to make & use a couple of "spines" (made outta (2) FG panels bonded to the sides of, a 1/2" foam core)
...with interlocking footboard & seatback/deck panels (also, made outta (2) FG panels bonded to the sides of, a 1/2" foam core)
...all bonded together & then, installed inside the FG body

Now I'ma workin' with a "new" idea
...ta make a (1) piece floorboard
...that has the footboard & seatback/deck "built in"

I'ma callin' it the "flyin' carpet" floorboard

* This concept should
...be a bit easier to make
...create a stiffer "inner "core"
...& provide more bonding surfaces

** It will bond all along the floorboard
...& to the upper body, in the front & rear too

 

[Whitetrashrocker]

Your getting faster at this FG stuff.

 

[Functional Artist]

Your getting faster at this FG stuff.

Hey WTR,

Showing folks that knowledge (knowing what to do) & practice (doing it over & over) builds confidence (I can do this)

 

[Functional Artist]

Hey Denny,

While working on assembling & shaping the mold for the "flying carpet" floorboard, I did a step-by-step description/illustration of my MDF shaping/forming method...for ya

Footboard to upper body junction (in the rough)

The tail (with extension)

Used the router to evenly remove ~1/4" of material

Like this

Then, used the disc sander (w/80 grit) to evenly round it off

Like this

Also, used the disc sander (w/80 grit) to rounded off the rear seatback to deck junction too

Then, used the palm sander (w/120 grit) to smooth everything...nicely

Like this

Now, it's ready for some paint

 

[Functional Artist]

Gettin' dark...so much earlier
...but, got 'er done...Satin white

Magic Carpet floorboard mold...ready for service

 

[Wicked_Daddy]

Anxious to see what powers this spaceship.

 

[Functional Artist]

• Anxious to see what powers this spaceship.

  Hey WD,

I saw member @Mammoth was using a GTS 11 motor & Fardriver controller combo...like this...on his kart
https://www.diygokarts.com/community/threads/electric-off-road-kart.55075/
...& it sounds quite interesting
...so, I'ma thinkin' about gettin' one

• Brushless Motor Kit 72V 5000W Peak 8000RPM with 100A Fardriver Controller (~$600.00)
• 
  
• 72V Motor Kit for Off-Road Power - This 72V 5000W brushless motor delivers 8.5N.m rated torque (peak 35N.m) with rated speed of 6800 RPM and 8000 RPM no-load speed. The 5-pair V-magnet rotor provides massive low-end torque for climbing steep hills and powering through mud on your go kart or dirt bike. Pure copper winding and 90% max efficiency ensure you get the most out of every charge.
• 
  
• Built to Beat the Heat, External Hall & Heat Sink Design - The heat sink housing and IP54-rated body keep this 72V brushless motor cool during extended rides. The external Hall sensor is mounted near the rear cover for better heat dissipation and easier maintenance. A built-in KTY84-130 temperature sensor monitors internal temps, preventing overheating damage.
• 
  
• Tune It Your Way, Programmable 100A Fardriver Controller - The 72v motor kit includes a sine wave 100A controller, which supports wide 48-72V rated voltage, with 300A protect phase current and IP67 rating. Adjust acceleration, current limiting, and high/low level braking to match your riding style. Monitor motor temperature and performance in real-time, all from your smartphone or PC.

https://www.ebay.com/itm/227571498268?_trkparms=itmf=1&aid=1110006&rkt=12&asc=346061&pid=101875&mech=1&algv=SimplAMLv11WebTrimmedV3MskuWithLambda85KnnRecallV1V2V4ItemNrtInQueryAndCassiniVisualRankerAndBertRecallWithVMEV3CPCAutoWithCassiniEmbRecall&pmt=1&amclksrc=ITM&sd=407159394827&sid=AQALAAAAEA5Fi4evm7v6/0UcWM5HJ0E=&itm=227571498268&noa=0&plcampt=0:164656249017&algo=HOMESPLICE.SIM&ao=1&rk=1&mehot=none&lsid=0&meid=1d72268be2974196afee4faa4c4e3bbb&pg=2332490&_trksid=p2332490.c101875.m1851&itmprp=cksum:2275714982681d72268be2974196afee4faa4c4e3bbb|enc:AQALAAABcOrUAJyocs9zq5pLBX3YtmatWsILip3iH8cXvCuqAHQycQTv%2F0%2FsvMD%2FiujDLuk04YfjG4hB1bvoSoZT22fSr86l4ZShqsEbKB92VPEA3U8iJy4PIJKdxno0JaAN1O0l9SNW8FeXf9POlGhR7no0dngpp41JhUposDyp8wrIWePZ2WVit%2Fs77Ssad66Av4xRomYQyMUDStDu1D5%2BAHibh4wsepMn9lGDzeJG1ordnrHm%2FQHrBI3SY%2Bd3vPyGydT2KDsTTn56rguJ82OtqB%2BadHVXj%2BBYKr7hYD7O1ol6iVhDhLyA11LGbQuWTz2Hz1aU9VYXu7qcFD9NAYIZ037S9SC1Qy3isvQHGu1LquAsFIa8XPcbmjVP6kC7SQkGAEmrAiqiQj%2F0Rt9PpHezPr3CQveoX7sHL877VnRLK9QU0DQdM6H%2Bcr5rhH74Bjbd4U%2FAd3ZEHFeVbHGvKygCpKZ6LJkB16OhhXJpRg1DlKcCNnrX|ampidL_CLK|clp:2332490&itmmeta=01M5MJY33Y5R78PQ6ESHMNZQNT

 

[Wicked_Daddy]

That's a serious motor. 6800 RPM? Wow. I believe an on-board video is in your future.

 

[Functional Artist]

That's a serious motor. 6800 RPM? Wow. I believe an on-board video is in your future.

Hey WD,

I looked up the specs of Predator 212 just for comparison

HP & Torque Rating of the Predator 212 Engine​

The stock Predator 212cc engine produces about 6.5 HP at 3,600 RPM and 8.1 ft‑lb of torque at 2,500 RPM

Performance Notes​

• The 6.5 HP figure is the rated output under standard conditions; real‑world performance can vary with load, tuning, and modifications
• 
  
• The 8.1 ft‑lb torque at 2,500 RPM provides strong low‑end pull, making it suitable for go‑karts, mini‑bikes, pressure washers, and small utility machines
• 
  
• Stock carburetor and governor are tuned for these ratings; performance upgrades (e.g., larger carb, camshaft) can push output toward 9–10 HP but may reduce low‑end torque and stress internals

Then, converted Ft. Lbs. to Nm (Foot Pounds to Newton Meters)

Converting 8.1 ft·lb to Newton‑meters (Nm)​

8.1 ft·lb ≈ 11.03 Nm
&

One electrical horsepower is exactly 746 watts.​

Conversion Formula​

To convert electrical horsepower (hp) to watts (W), use the formula:
Watts = Horsepower × 746
For example, if you have a 5 hp electric motor:
5 hp × 746 W/hp = 3,730 W
or
in our example 5,000W/746= 6.7HP

So, according to these numbers, a stock (6.5HP) Predator can deliver ~11 Nm
...& this little (also, ~6.5 HP) motor delivers 8.5N.m rated torque (peak 35N.m)

But, also, "keep in mind" that gas (ICE) engines need to "wind up" before they can deliver that torque
...whereas electric motors deliver their torque...right off the line

* Video...probably not until next spring...as Winter is almost upon us...here in the mid-west of the USA

 

[Functional Artist]

Used the mold to pre-cut some (3 layers) 1708 FG cloth (no measurin' required)

Then, coated it with PVA

After a couple of hours (ta dry good) I layed down a layer of the 1708

* The first layer seemed to lay down pretty good
...it's nice-n-tight, on the curves
...& nice-n-smooth, on the flats

Really didn't plan on gettin' this far on this project (being mid -October & all)
...&/so, ran outta the FG resin

So, I had ta stop...with just the (1) layer...for now

Footboard area

Seatback area

I purposefully left some "raw" FG cloth, hanging off the rear edge
...to use for installation/bonding, when installing the floorboard, into the body

 

[Functional Artist]

According to the weather forecast, we are gonna have some nice weather (no rain & upper 60's & lower 70's) for another week
,..so, I went ahead & ordered a gallon of resin (~$50.00 per gal. & folks area whinin' about $4.00 per gal. gas prices )

Whilst we wait, I aligned the floorboard with the body ta check & see how close "we is"

Overall view

Tail area

Nose area

I must say...looks "doable"

 

[Functional Artist]

Whilst waitin' for the FG resin, we can discuss axle mounting idea/concepts

I'm thinkin' we can mount the front axle to the floorboard (kinda like we did on the Granite racer)
...& use (2) rear "spine" inserts (triangularly mounted to the seatback & the deck & the curved floorboard)

These inserts will be spaced ~8" apart
...could be/will be used for mounting the battery pack, motor & rear wheel
&
I'm thinking to use (2) metal (steel or aluminum) axle brackets
...bolted to the sides of the FG inserts, for mounting the rear wheel

Comments?
...concerns??