S1 rebuild....not one for the purist

[GreenV8S]

Alan 1209 said:

https://www.dropbox.com/s/59njt0gsxic8r87/Chassis....
This is where I'm going with the bonnet hinge, the hinges are early ford Ka boot hinges and have some assistance from gas springs, I've left these out video of the for reasons of sanity. This gives an 80deg opening angle and lifts the bonnet by some 40mm at around 60deg opening.

Do you have any problems keeping the two sides in sync?

[Alan 1209]

No, the gas springs keep them balanced. For my ref do any of you long term owners know how heavy an S1 bonnet is? in kgs or lbs. Ta.

[mk1fan]

Really fudging heavy.

[Alan Whitaker]

If I find the scales will put mine on the crane and let you know

[magpies]

Alan 1209 said:

No, the gas springs keep them balanced. For my ref do any of you long term owners know how heavy an S1 bonnet is? in kgs or lbs. Ta.

I'll see if I can weigh the scrap one in the garden tomorrow

[Alan Whitaker]

Scrap bonnet?, Have you had a crash

[greymrj]

mk1fan said:

Really fudging heavy.

Aint that the truth! Massive sail as well if there is any wind....dont open the bonnet at the side of the motorway!

[Brithunter]

Perhaps take a look a the bonnet hinges from a Rover 75 they are similar design to your drop box have strut assist and hold up the fairly large steel bonnet of the 75 without a problem .............................................. just a suggestion of course.

Of course a set would be easy to obtain froma breakrs too.

[magpies]

Alan Whitaker said:

Scrap bonnet?, Have you had a crash

no - bought it as cheap

[Alan 1209]

Brithunter said:

Perhaps take a look a the bonnet hinges from a Rover 75 they are similar design to your drop box have strut assist and hold up the fairly large steel bonnet of the 75 without a problem .............................................. just a suggestion of course.

Of course a set would be easy to obtain froma breakrs too.

Hi,Rover 75 is a straightforward pivot hinge, so no improvement over the TVR hinge. The Ka unit is kinematic and has gas spring assist, I just left them out of the 3D model.

[mk1fan]

Brithunter said:

Perhaps take a look a the bonnet hinges from a Rover 75 they are similar design to your drop box have strut assist and hold up the fairly large steel bonnet of the 75 without a problem .............................................. just a suggestion of course.

Of course a set would be easy to obtain froma breakrs too.

The Ford ones have stuts too, each hinge has ball sockets to attach a mini strut. The 75 bonnet is a lightweight in comparrison to the S clamshell.

As there is a 75 in the drive as well, I may have a looky look at them too.

[Brithunter]

OK just a thought. Have never had the reason to study the 75's bonnet never though we swapped one due to a huge patch of lacquer lift. Noticed that the bonnet was not particularly light though.

[Alan Whitaker]

The S1 bonnet on the scales is

[phillpot]

Is that your some what modified bonnet Alan? complete with lights and rubber bumpers ?

[Alan Whitaker]

Hi Mike. I hung the lights and some stainless mesh on there as well, so just paint to add, don't have rubber bumpers on now

Alan

[Alan 1209]

Wow, just 33kgs, so why can't I pick it up (cause I'm a bit of a wimp i guess)
Thanks so much for that, now i can calculate my spring force.

Starting on the hinge brkts now.

the basic parts.


The frame started, close observers will notice the improvement in my welding.


A small selection of my clamps.....


Nearly there, I may cut out the centre of the cross bar after everything is welded in place.

[Alan Whitaker]

Be stronger with it left on, no chance of bending down at the ends

Alan

[Alan 1209]

Alan Whitaker said:

Be stronger with it left on, no chance of bending down at the ends

Alan

True, but the bonnet only weighs 33Kgs so its not really an issue. I'll put it trough cosmos and see what the bend is. Or just stand on it and see what happens.

[Alan Whitaker]

Not it's static weight but the weight from bumps, bouncing and driving, could be up to 5 times it's load

[magpies]

It is also the windage forces when open in a breeze or side of the road. Two gas struts will help but I'd also try to incorporate some mid point opening stop.