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Learning how to build Lotus Seven replicas...together!
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 Post subject: Re: Brad's Rocket build.
PostPosted: Sat Nov 07, 2009 11:17 pm 
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golftdibrad wrote:
Assembled press, pressed parts, disassembled press, shower, return press*, watch the refs loose the LSU game for us, and I'm home.

*I had a bad experience using a shop to press FWD bearings. I do it my self now whatever it takes... even if its a bit sleazy.

Please don't make that a habit. I worked with a woman once who'd buy a dress, go to a party, then return it. That one habit told me more than I ever wanted to know about her. Then there was the guy who'd return his "broken" six-month old laptop to Costco, over and over. Twice a year he'd have a new laptop. Guess what, they discontinued the policy of accepting stuff back due to that crap.

Please don't. Sorry, but I had to speak my mind. On the web, silence implies consent.

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 Post subject: Re: Brad's Rocket build.
PostPosted: Sat Nov 07, 2009 11:38 pm 
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Posts: 162
golftdibrad wrote:
My goal for the weekend was to get it rolling chassis.

So I was like screw it, I WANT rear suspension. Buy that crap and go home.

Assembled press, pressed parts, disassembled press, shower, return press*, watch the refs loose the LSU game for us, and I'm home.

Work continues tomorrow....

*I had a bad experience using a shop to press FWD bearings. I do it my self now whatever it takes... even if its a bit sleazy.


:(


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 Post subject: Re: Brad's Rocket build.
PostPosted: Sun Nov 08, 2009 9:28 pm 
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Posts: 185
Location: Baton Rouge
KB58 wrote:
Please don't make that a habit. I worked with a woman once who'd buy a dress, go to a party, then return it. That one habit told me more than I ever wanted to know about her. Then there was the guy who'd return his "broken" six-month old laptop to Costco, over and over. Twice a year he'd have a new laptop. Guess what, they discontinued the policy of accepting stuff back due to that crap.

Please don't. Sorry, but I had to speak my mind. On the web, silence implies consent.


Tralfaz wrote:
:(



Ok, I'm not like that but I felt I had good reasons. Allow me to explain.

1. I was once overcharged about 20 bucks at my local HF. They would not refund the money to my bank card, and to file a protest with the bank would mean no bank card for a week. Not acceptable.

2. My bad experience.... I had a wheel bearing go bad in the dub and went to a local shop to press it. Well, they wanted cash and little did I know it was because they wanted no record of the work. The mechanic cracked the race. When you do that... they dont make noise. I found out about this about two months later (and less than 5k miles) when I heard a horrible grinding in the front of the car. Brakes, rotor, caliper carrier, and two new tires were in order.... not to mention a new bearing, spindle, and hub. 700 dollars and I was without a car for a week. not fun.

3/4. Thats a big mofo press. I simply do not have space to store it right now. Money is also tight as I try to pay down debt and maintain a racing addiction.

I figure after this Karma, HF and I are even. Next time I need a press I'll think ahead a little more or just buy it.

So, take that as you will. I'm not a bad guy, just a bad-a guy. 8)

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 Post subject: Re: Brad's Rocket build.
PostPosted: Sun Nov 08, 2009 10:13 pm 
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Joined: Sun Oct 26, 2008 8:17 pm
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Location: Baton Rouge
Well, I missed my goal of making a rolling chassis today but just a little. FYI 15 inch alloy wheels don't fit the rear of the car :( Will 16's? I hope. 17's are too big for this thing IMHO.

I figured out the steering after looking at the instructions, who knew? Didn't get a chance to fab it though.

Pretty un eventful, just a bunch of work. Pics for your enjoyment.

Image
Image

-Brad

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 Post subject: Re: Brad's Rocket build.
PostPosted: Wed Nov 11, 2009 12:15 am 
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Joined: Wed Aug 30, 2006 10:26 am
Posts: 250
Location: Carmen, campeche, Mexico
golftdibrad wrote:
Well, I missed my goal of making a rolling chassis today but just a little. FYI 15 inch alloy wheels don't fit the rear of the car :( Will 16's? I hope. 17's are too big for this thing IMHO.



Pretty un eventful, just a bunch of work. Pics for your enjoyment.

Image
-Brad


I think you better consider using wider tires...
:wink:


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 Post subject: Re: Brad's Rocket build.
PostPosted: Wed Nov 11, 2009 9:07 am 
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I expect the rear uprights to eventually crack from flexing.

There is a stiffener on top center. There are much stiffer DIY designs on this site. Four, .125" x .750", drilled ribs (plates down each side from uca pivot to lca pivot) could be just as light yet much stiffer.

If you don't want to strengthen it, at least keep an eye on it.

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 Post subject: Re: Brad's Rocket build.
PostPosted: Wed Nov 11, 2009 10:11 am 
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Location: West Chicago,IL
Along those lines, you could add 4 ribs from the center ring to the 3 pivot brackets. This should essentially box it all in. Ideally the lower ribs would be to the outer flange of the pivot brackets but it may break through space and not look too elegant. See the red lines. I would also add in a rib across the bottom tying the 2 lower pivot points.

To save a bit of weight you could trim the outer plate closer to the new ribs.

Pardon the aspect ratios in the picture, I just drew something based on the views I could see.

When you get to that point, I would also find a way to tie the brake caliper mounting ears to the boxed section rather than just welding them to the outer face plate.

Just a suggestion....


Attachments:
boxed.JPG
boxed.JPG [ 27.27 KiB | Viewed 3176 times ]

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 Post subject: Re: Brad's Rocket build.
PostPosted: Tue Nov 24, 2009 1:06 am 
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Joined: Sun Oct 26, 2008 8:17 pm
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Location: Baton Rouge
Well, I think I'm close to connecting the steering wheel to the front wheels. Got my adapter fabed up with the help of a friend and it *just* kisses some frame. After some work with the flap wheel it should fit fine.

sorry no pics today :D

-Brad

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 Post subject: Re: Brad's Rocket build.
PostPosted: Tue Nov 24, 2009 1:18 am 
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Location: Baton Rouge
Miatav8,MstrASE,A&P,F wrote:
I expect the rear uprights to eventually crack from flexing.

There is a stiffener on top center. There are much stiffer DIY designs on this site. Four, .125" x .750", drilled ribs (plates down each side from uca pivot to lca pivot) could be just as light yet much stiffer.

If you don't want to strengthen it, at least keep an eye on it.


Thanks for pointing that out. I'll add it to the list. Like the front LCA pick up has already had issues on some cars.

rx7locost wrote:
Along those lines, you could add 4 ribs from the center ring to the 3 pivot brackets. This should essentially box it all in. Ideally the lower ribs would be to the outer flange of the pivot brackets but it may break through space and not look too elegant. See the red lines. I would also add in a rib across the bottom tying the 2 lower pivot points.

To save a bit of weight you could trim the outer plate closer to the new ribs.

Pardon the aspect ratios in the picture, I just drew something based on the views I could see.

When you get to that point, I would also find a way to tie the brake caliper mounting ears to the boxed section rather than just welding them to the outer face plate.

Just a suggestion....


Thanks for the info!

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If it has tits or tires it will cost you money.


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 Post subject: Re: Brad's Rocket build.
PostPosted: Mon Nov 30, 2009 3:42 pm 
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Joined: Sun Oct 26, 2008 8:17 pm
Posts: 185
Location: Baton Rouge
I think i may have the brakes figured out. Such a basic thing... run a hydraulic system. But then you have different flares, an to brake to pipe thread adapters, one end standard the other may be metric... wow.

For you guys building though..... I got this from an ebay seller. http://www.longacreracing.com/catalo...d=551&catid=18

available in -3 and -4. I priced some parts out and it seems like a pretty good deal. Now just to figure out what adaptor fitting I need and the rear and order that from summit.

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 Post subject: Re: Brad's Rocket build.
PostPosted: Tue Dec 15, 2009 7:18 am 
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Miatav8,MstrASE,A&P,F wrote:
I expect the rear uprights to eventually crack from flexing.

.


Holy crap, all the time I was looking at them I thought they were just templates for alignment and the 'real' ones get fitted later!


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 Post subject: Re: Brad's Rocket build.
PostPosted: Tue Dec 15, 2009 9:00 am 
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Your right, it does look like a well made template.

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My reverse commuter trike build log: viewtopic.php?t=11384
Fitting glass and weatherstripping: viewtopic.php?f=23&t=6451
Growing various fruit trees, berry bushes, and wine grapes in zone 7b.


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 Post subject: Re: Brad's Rocket build.
PostPosted: Sat Jan 23, 2010 12:44 pm 
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Joined: Sun Oct 26, 2008 8:17 pm
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Location: Baton Rouge
I have too many wheels in my garage....

Image
Image
Image
Image

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 Post subject: Re: Brad's Rocket build.
PostPosted: Sun Jan 24, 2010 6:12 am 
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:ack: That is one ugly Exo - not sure how the same company can make the beautiful Sonic and this?


Last edited by cheapracer on Sun May 09, 2010 1:22 pm, edited 1 time in total.

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 Post subject: Re: Brad's Rocket build.
PostPosted: Sun Jan 24, 2010 12:04 pm 
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Mid-Engined Maniac

Joined: Sun Apr 23, 2006 8:26 pm
Posts: 4883
Location: SoCal
If you redesign the rear uprights, consider mounting the outboard end of the shock directly to the upright. That gets rid of all bending loads on the lower arm and bearings.

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Midlana book: Build this mid-engine Locost!, http://www.midlana.com/
Kimini book: Designing mid-engine cars using FWD drivetrains, http://www.kimini.com/book_info/


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