LocostUSA.com

Learning how to build Lotus Seven replicas...together!
It is currently December 17, 2018, 12:29 am

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 24 posts ]  Go to page Previous  1, 2
Author Message
 Post subject: Re: headlights
PostPosted: April 10, 2013, 6:41 pm 
Offline

Joined: September 10, 2009, 6:25 am
Posts: 42
Miatav8,MstrASE,A&P,F wrote:
It isn't critical on non structural parts. Critical parts are control arms, chassis, bolts, etc.

The chroming process, including how it is treated immediately after chroming, determines the extent of hydrogen embrittlement.

The stainless buckets are a no brainer unless you want to paint them.

If painting, cheapo chrome buckets are fine is given a light blasting to etch the surface for paint.

You might also consider a 5-3/4 motorcycle bucket or 36 dodge bucket for less drag


So, we are talking about the A-arms and link to the inboard coilover. He did say something about the nickel plating being less aggressive than the chrome -- perhaps that is what he was referring to. I'm a structural aerospace engineer, but this is materials stuff and we don't chrome much on aircraft so I confess to not knowing much about it.

THe B3 isn't particularly aerodynamic, and I kind of like the way the bigger lights work. I'll have to take a look at the Dodge buckets and see what those look like. If the stainless look pretty much chrome I think I can live with that. Does anyone know anything about those type of lights I posted? They look like they could be kind of interesting.


Top
 Profile  
Reply with quote  
 Post subject: Re: headlights
PostPosted: April 10, 2013, 7:01 pm 
Offline
Mid-Engined Maniac

Joined: April 23, 2006, 8:26 pm
Posts: 5921
Location: SoCal
Without chasing down those links, as long as they contain true headlights you should be okay. Some people sell compact "headlights" that are actually just utility spotlights in a housing, which are entirely wrong for street driving. They'll piss off other drivers, and not have a decent beam pattern to properly light the road.

_________________
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/


Top
 Profile  
Reply with quote  
 Post subject: Re: headlights
PostPosted: April 10, 2013, 7:27 pm 
Offline

Joined: September 10, 2009, 6:25 am
Posts: 42
KB58 wrote:
Without chasing down those links, as long as they contain true headlights you should be okay. Some people sell compact "headlights" that are actually just utility spotlights in a housing, which are entirely wrong for street driving. They'll piss off other drivers, and not have a decent beam pattern to properly light the road.


Actually Rayjays, which is the link you posted, also apparently carries them so it looks like they shouldn't be a problem. Looks like I need to poke around a bit. Thanks for the links!


Top
 Profile  
Reply with quote  
 Post subject: Re: headlights
PostPosted: April 10, 2013, 8:50 pm 
Offline
Automotive Encyclopedia
User avatar

Joined: December 22, 2006, 2:05 pm
Posts: 5820
kennyrayandersen wrote:
Miatav8,MstrASE,A&P,F wrote:
It isn't critical on non structural parts. Critical parts are control arms, chassis, bolts, etc.

The chroming process, including how it is treated immediately after chroming, determines the extent of hydrogen embrittlement.

The stainless buckets are a no brainer unless you want to paint them.

If painting, cheapo chrome buckets are fine is given a light blasting to etch the surface for paint.

You might also consider a 5-3/4 motorcycle bucket or 36 dodge bucket for less drag


So, we are talking about the A-arms and link to the inboard coilover. He did say something about the nickel plating being less aggressive than the chrome -- perhaps that is what he was referring to. I'm a structural aerospace engineer, but this is materials stuff and we don't chrome much on aircraft so I confess to not knowing much about it.

THe B3 isn't particularly aerodynamic, and I kind of like the way the bigger lights work. I'll have to take a look at the Dodge buckets and see what those look like. If the stainless look pretty much chrome I think I can live with that. Does anyone know anything about those type of lights I posted? They look like they could be kind of interesting.


http://standards.sae.org/ams2759/9d/
If you do not have access to this, in a nut shell, baking at 300 F for a few hours immediately after plating is typical. I meet with a group of aerospace engineers (structural, propulsion, avionics) regularly to discuss various aircraft modifications.

A little big and expensive:
http://www.srpmstreetrods.com/render.cz ... SELL_COUNT

5-3/4 DOT legal lamp (should be embossed on lens):
http://www.motosport.com/cruiser/produc ... 4AodHnAAIA


Attachments:
534.jpg
534.jpg [ 34.08 KiB | Viewed 1735 times ]
36dodge.jpg
36dodge.jpg [ 10.29 KiB | Viewed 1737 times ]
Top
 Profile  
Reply with quote  
 Post subject: Re: headlights
PostPosted: April 11, 2013, 3:01 am 
Offline

Joined: September 10, 2009, 6:25 am
Posts: 42
I like the '36 bucket -- anyone got a pic of how it mounts? Right now I think the setup is similar to the King Bee/Dietz type with the bolt on the bottom...


Top
 Profile  
Reply with quote  
 Post subject: Re: headlights
PostPosted: April 11, 2013, 2:44 pm 
Offline

Joined: February 16, 2006, 3:56 pm
Posts: 139
Location: Austin, TX
1936 Dodge D2. scroll to the bottom of the link. Great looking headlights, but they might require some modification for locost.

http://cascadiaclassic.blogspot.com/201 ... chive.html


Top
 Profile  
Reply with quote  
 Post subject: Re: headlights
PostPosted: April 11, 2013, 6:45 pm 
Offline

Joined: September 10, 2009, 6:25 am
Posts: 42
gregaustex wrote:
1936 Dodge D2. scroll to the bottom of the link. Great looking headlights, but they might require some modification for locost.

http://cascadiaclassic.blogspot.com/201 ... chive.html


Yeah, those do look super sweet but I agree - looks like it would require some extra work to get the mount righr on a 7-type mount whitch is similar to the Buckland.


Top
 Profile  
Reply with quote  
 Post subject: Re: headlights
PostPosted: April 11, 2013, 8:24 pm 
Offline

Joined: October 19, 2009, 9:36 pm
Posts: 2090
Location: meadview arizona
when i was going to install my headlights, i had some cheap hotrod lights, i made the mountings by welding 1-1/2" box to the side of my chassis, see pic 1
Attachment:
insurance application 002.jpg
insurance application 002.jpg [ 56.35 KiB | Viewed 1684 times ]


note the mounting, it is straight, also note the distance to the front fender, this was with the wheels pointing in the straight ahead position.

having driven the car for about 100 miles i noticed a small mark on the top of the fender and another on the headlight rim, it was evident that under full lock and traversing a bump, the two were meeting.

to rectify this i tried moving the lamps up, after two inches i decieded that they would still hit, so i moved them in 1" they still were too close for comfort.

this is what i had to do to allow for clearence on full lock and full bump.
Attachment:
john camera 026.jpg
john camera 026.jpg [ 60.75 KiB | Viewed 1684 times ]


diferent angle but in essence i had to move them back so that the widest part of the light was at the fulcrum of the wheel turning circle, half an inch in either direction would result in a contact, i still am not convinced that they will never meet so i have placed a piece of soft felt at the contact point on the headlight just in case they will ever meet.

the moral of this story is 1, use the real lights that you will be fitting in the mock up stage, 2, test the clearence at full lock and full bump, 3, allow sufficient room for light direction focus adjustment.

_________________
this story shall the good man teach his son,
and chrispin chrispian shall ne'er go by,
from this day to the end of the world.
but we in it shall be remembered.


Top
 Profile  
Reply with quote  
 Post subject: Re: headlights
PostPosted: April 11, 2013, 9:10 pm 
Offline

Joined: March 26, 2012, 1:53 am
Posts: 207
Location: Mountain View, CA
re chrome vs. nickel, electroless nickel plating is used for wear surfaces so durability should be good

_________________
------------------------------------
Noah


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 24 posts ]  Go to page Previous  1, 2

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 4 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
POWERED_BY