Recent content by Andy R

Not a whole bunch completed this month, must have worked to much….. made the front ground effect tunnels and glassing in. Don’t know if they’ll do much but I like them. Leon, no front roll hoop required this time... The scrutineer was happy and so was I. And to the GT40S community, have a...

Udo, what a stunning car you have built and should be very proud off. Now you can enjoy getting out on the track and developing the car. Have a great break. Andrew

A MSNZ scrutineer viewed the Roll hoop and I now have a MSNZ log book and the Roll Hoop is Homologated. Whew… So after that I polished up the hoop and shipped to Auckland to Bumpers Replacements NZ. To get Copper then Nickel plated. They were the only company that had baths physically big...

A little more done.. Completed the left side front support. The strut unbolts easy. Theres a aluminium bush at the front that can be offset to rise and fall 15mm if needed. Finally upgraded my TIG Defuser Lens Cup to a Furick. Wish I had thrown away the standard junk 10 years ago. Onto the...

Rear wing completed. Did solid countersunk rivets on the wing top (as many as I could) and Sealed countersunk on the underside. The 1/2” pivot rod lined up pretty well and wing is sitting at 10 degrees angle of attack on the lowest setting. The solid countersunk rivets are harder to install...

MSNZ notified me, my Rollcage and Logbook are approved. :) Just 1 more step..... a MSNZ scrutineer now has to have eyes on and verify the pictures are the same as the cage.o_O This added step is due to a few bods changing/adding bars etc after homologation process, so I just need to organise...

Hi Andrew, Main Hoop will be fine since I’ve gone down the Alternate design/Engineers report route. It’s the front hoop that will be an issue.

I did read somewhere about Chrome plating and Hydrogen embrittlement. Will investigate more Nickel plating, there's a few places in Auckland that maybe able to handle the dimensions. Failing that there's bright Chrome powder coating. Has anyone had parts Chrome powder coated. Does the shine last?

Hi Michel/Howard, the Rofgo M20 pics on their site of chassis #3 have been an immense help over the years. Will do something close to that. Had the Rollhoop welded up by a recognised manufacturer to satisfy the the Motorsports NZ powers.. Resubmitted my Rollcage and Logbook application. We'll...

Still waiting for the airfoils to get folded, so onto other jobs. Made the helmet head rest. Moved the chassis further back on the build table. The front clip needs widening to sit better over the wheels and lengthened. The doors also require some surgery. Going to add removable front air...

There is a flush rivet method that uses the thin 0.8mm cover sheet by dimpling the outer sheet and countersink cutting the rib tab to accommodate that dimple and then rivet, but I'll stick with what I'm doing.

Thanks for your input Michel. I’m going with the 1.2mm thickness as I have 5/32 countersunk solid rivets that I intend to use as much as possible(bucking bar limited). A universal head rivet would work great with 0.8mm sheet, but the countersunk cut would go through to the rib, which I take it...

I am using the Seagull shaped aerofoil. Theres a few online comparisons Seagull vs Naca4412. Made 2 rib forms out of left over 20 & 12mm 7075 plate. Sandwiched 2mm 5052 H34 between them and hamered the tabs 90 deg. 2mm for the rib is quite stout. Made the end plates out of 3mm 5083 and welded on...

That's a fine question there Neil, 3 years ago I was looking into aerofoil design and liked the Reynolds S1223 but the trailing edges where too thin to make into aluminum (in my opinion) probably better suited to composite construction. I found a design that I liked but I'm buggered if I can...

Made the rear wing struts out of 12mm 7075. Bullnosed the leading edge and tapered the rear. Turned up some bushes for the top and bottom of struts. Turned up some bushes for the side fences. Shot a laser line horizontal and vertical to get the top strut centres. Will do a twin rod end under...