+-

+-User

Welcome, Guest.
Please login or register.
 
 
 
Forgot your password?

Recent Posts

Re: TVA Bronze bush by TheGiantTribble
Today at 12:10:25 pm

Re: TVA Bronze bush by RhysN
Today at 06:39:11 am

Re: Cir clip help by TheGiantTribble
11 July 2020, 05:49:05 pm

For Sale: Cyclekart by bamfordmartin
11 July 2020, 05:16:52 pm

Re: TVA Bronze bush by GeoffM
11 July 2020, 01:29:18 pm

Re: Cir clip help by StefanN
11 July 2020, 12:22:11 pm

Re: Cir clip help by RhysN
11 July 2020, 11:10:52 am

Re: Cir clip help by Chris Brown
11 July 2020, 10:05:03 am

Re: Cir clip help by Chris Brown
11 July 2020, 09:58:26 am

Cir clip help by TheGiantTribble
11 July 2020, 08:50:50 am

Top Boards

Board Topics Posts
Build journals New 21 790
Tech Forum New 95 718
Events New 43 398
Members New 90 267
Off Topic New 31 160
Where to get stuff New 25 137
For sale and wanted New 18 51
Start Here New 7 24
CK number register New 6 20
Announcements New 9 9

Top Topics

Views Replies
Dodge baquet ish build. 75966 120
Delage 15-S-8 37716 140
Article in the Parish Magazine 25343 6
Bugatti Type 37 Build 24216 126
Napier 1903 Gordon Bennett 20505 49
Whilton mill kart track practice days. 15995 31
Brakes 15521 39
Builders Meeting. Coventry Transport Museum. Saturday February 1st 2020. 14768 31
Helping the builders who have yet to start 14345 8
CK 1 (ERA) build 14296 53

Author Topic: CK 1 (ERA) build  (Read 14296 times)

ChrisS

  • Full Member
  • ***
  • Posts: 122
  • Location: Crowborough, East Sussex
    • View Profile
CK 1 (ERA) build
« on: 15 January 2019, 09:46:37 am »
I decided I wanted to build something British for my first cyclekart so I chose an ERA as my inspiration.

[ Guests cannot view attachments ]
I did some work scaling it into a cyclekart.
[ Guests cannot view attachments ]
I want to keep it simple so I am planning a plywood tub slung in between the chassis rails, probably pit-bike wheels and regular cyclekart style front suspension, solid at the rear with the axle through the centre of the rails.
Progress to date;  steel has been delivered and I've built a mock up tub from hardboard and paper. Predictably, I've had to enlarge the cockpit from my original drawings, and I will need a detachable steering wheel.
[ Guests cannot view attachments ]

Share on Facebook Share on Twitter


Graham Hill

  • Global Moderator
  • Full Member
  • *****
  • Posts: 200
  • Location: Leicester UK
    • View Profile
Re: CK 1 (ERA) build
« Reply #1 on: 15 January 2019, 11:24:20 am »
That's a really great start Chris and keep up the build journal for everybody.
It will be good to catch up with you again at Stretton, consider yourself booked for some more drive time in my MG. (if you can stand the pain!).

ChrisS

  • Full Member
  • ***
  • Posts: 122
  • Location: Crowborough, East Sussex
    • View Profile
Re: CK 1 (ERA) build
« Reply #2 on: 15 January 2019, 12:23:56 pm »
Sorry, the pics seem to have come up a bit large, should I have reduced them somehow??

TheGiantTribble

  • Full Member
  • ***
  • Posts: 165
  • Bill Alexander, Maserati 750 V8R1 Red
  • Location: Clacton on Sea, Essex.
    • View Profile
Re: CK 1 (ERA) build
« Reply #3 on: 15 January 2019, 02:22:58 pm »
The pictures seem fine to me.
And great car choice, always liked ERA's myself.
Cockpit size is a compromise but very important to get correct, the first time I tried
to build a CK, an ERA 'E' type, I could get in but not out...opps!

ChrisS

  • Full Member
  • ***
  • Posts: 122
  • Location: Crowborough, East Sussex
    • View Profile
Re: CK 1 (ERA) build
« Reply #4 on: 20 January 2019, 08:26:20 am »
A big day yesterday, as I started building the real thing, no more mock up!  I'm using 12mm ply for the floor and 9mm for the sides although having read Rhys's Kim journal, I think I could have gone lighter. I will probably have to make some relieving cuts to allow the side panels to bend where I want.  I had some 25mm ash left over from a previous project which I am using for the joints. I plan to do the tub first, then construct the chassis round it.

I've bought an axle, carriers, hubs etc for the rear from Gemini, but I'm holding back on the front as I am still unsure about springing and stub axles/bearings and I haven't managed to source my wheels yet.

RhysN

  • Hero Member
  • *****
  • Posts: 535
  • Location: Tamworth
    • View Profile
Re: CK 1 (ERA) build
« Reply #5 on: 20 January 2019, 09:34:41 am »
I don't think you need relieving cuts Chris.
Once you have decided on the curve, set up a few pieces of timber on a work table, bits of 3 x 2 at right angles to the side panels, lay your ply on top, then cover with towels (charity shop to save being castigated?) and wet them with hot water. Even better to use a fairly hot iron and get the ply soaked and you will be surprised how supple it becomes. Put some weights on the top and let it settle.  Once it's dry you will have your curved sides. The more effort you put to jigging it, the closer to your required shape. I suggest cutting the sides before curving. In reality the ERA has very little shape until you get to the back axle, which is where the tub on my ERA ended. There is a brief bit on mine, on www.gittrevillegp.com, then work through "The Cars", mine is in Cars B, but there is a mountain of info there so have a look at the lot. All those cars showing with differentials have removed them.
Don't forget to have a left and a right, guess how I know this!

ChrisS

  • Full Member
  • ***
  • Posts: 122
  • Location: Crowborough, East Sussex
    • View Profile
Re: CK 1 (ERA) build
« Reply #6 on: 09 February 2019, 02:03:50 pm »
Work is going to stop now for a month as I will be away visiting family, so here's a quick progress photo! 

Nothing glued yet or welded, the whole thing is held together with clamps and ratchet straps!  I need to weld up the chassis as a priority when I return, stop it moving around!

I decided to try making the grille surround from mdf, some way to go on that yet, work in progress!

RhysN

  • Hero Member
  • *****
  • Posts: 535
  • Location: Tamworth
    • View Profile
Re: CK 1 (ERA) build
« Reply #7 on: 09 February 2019, 05:01:00 pm »
Looks great Chris. Plenty of time to think little details while you are away :)

ChrisS

  • Full Member
  • ***
  • Posts: 122
  • Location: Crowborough, East Sussex
    • View Profile
Re: CK 1 (ERA) build
« Reply #8 on: 02 April 2019, 01:26:10 pm »
I've now got my wheels, I'm using 2 C90 rears and 2 C90 fronts.  I've fitted the driven wheels with 37 x 25 bearings and mated them to Gemini rear hubs.
I pressed out the wheel studs and cut off the Gemini boss to leave a flush surface. [ Guests cannot view attachments ]
Drilled new 10mm dia holes (100mm PCD) [ Guests cannot view attachments ]
Filed 4 slots in the Honda hub [ Guests cannot view attachments ] [ Guests cannot view attachments ]
Made cover plate to fit where the cush drive used to be. (4mm steel) [ Guests cannot view attachments ]
All bolted up. [ Guests cannot view attachments ]

Graham Hill

  • Global Moderator
  • Full Member
  • *****
  • Posts: 200
  • Location: Leicester UK
    • View Profile
Re: CK 1 (ERA) build
« Reply #9 on: 02 April 2019, 06:05:34 pm »
Keep up the detail of the build posts Chris, it's what this site needs to encourage others. Thanks also for making the trip to Coventry at the weekend it was good to catch up again.

RhysN

  • Hero Member
  • *****
  • Posts: 535
  • Location: Tamworth
    • View Profile
Re: CK 1 (ERA) build
« Reply #10 on: 03 April 2019, 03:21:39 pm »
Looking good, I'm curious as to why you have put bearings in the rear wheels.

ChrisS

  • Full Member
  • ***
  • Posts: 122
  • Location: Crowborough, East Sussex
    • View Profile
Re: CK 1 (ERA) build
« Reply #11 on: 03 April 2019, 07:08:57 pm »
Yes, there is no rotation so I could have bushed them but the bearings were available and cheap. I suppose there is a chance that they might start pitting after a while, we'll see.

ChrisS

  • Full Member
  • ***
  • Posts: 122
  • Location: Crowborough, East Sussex
    • View Profile
Re: CK 1 (ERA) build
« Reply #12 on: 10 April 2019, 09:04:47 am »
Here are some pictures re-assembling my rear wheels, it's a first for me but there are plenty of youtube videos to follow.  I bought a spoke spanner, ebay £2, but the hardest part was the dismantling as I wanted to save the spokes. WD40 shifted most of them but the stubborn ones needed a blast with the blow torch.

Steve Cole

  • Full Member
  • ***
  • Posts: 136
  • Location: Montgomery, Welsh Border
    • View Profile
Re: CK 1 (ERA) build
« Reply #13 on: 11 April 2019, 04:56:26 pm »
I’ve never done anything like this Chris. How do you get it all balanced and running true?

ChrisS

  • Full Member
  • ***
  • Posts: 122
  • Location: Crowborough, East Sussex
    • View Profile
Re: CK 1 (ERA) build
« Reply #14 on: 11 April 2019, 08:21:51 pm »
You have to mount the wheel so that it can spin freely, see pic above, then fix a batten or similar to use as a gauge ( I used a steel rule). THen by following a process of loosening and tightening you need to first adjust for concentricity and then for side to side. Finally tighten to an even tension all round. Proper wheelbuilders use torque wrenches, but I just keep going until they all ping nicely!  No doubt after 20 mins on a dirt track I'll find out if that was good enough!

Perhaps if anyone is interested I can put a more detailed explanation in the technical section.