Landracing Forum Home
December 15, 2018, 08:28:42 AM *
Welcome, Guest. Please login or register.
Did you miss your activation email?

Login with username, password and session length
News:
BACK TO LANDRACING.COM HOMEPAGE
 
   Home   Help Search Calendar Login Register  


(Note: Donations are not tax deductible)







Live Audio Streaming and Archives of Past Events
Next Live Event: TBD
Pages: 1 2 3 4 5 6 7 8 [9] 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24   Go Down
  Print  
Author Topic: 2nd 100cc APS build  (Read 93514 times)
0 Members and 1 Guest are viewing this topic.
Speed Limit 1000
Hero Member
*****
Offline Offline

Age: 68
Location: Denver, Colorado
Posts: 1069





Ignore
« Reply #120 on: February 21, 2015, 02:56:03 PM »

The brown packing tape works good as a release. Nothing seams to stick to it and the 3M 77 spray also works great to glue the foam together.
Logged

John Gowetski, red hat @ 221.183 MPH MSA Lakester, Bockscar #1000 60 ci normally aspirated w/N20
sofadriver
Sr. Member
****
Offline Offline

Age: 68
Location: tacoma, wa
Posts: 518





Ignore
« Reply #121 on: February 21, 2015, 03:20:54 PM »

The brown packing tape works good as a release. Nothing seams to stick to it and the 3M 77 spray also works great to glue the foam together.
Thanks John. I tried the 3m 77 and others but the large foam panels weren't perfectly flat enough to get large contact areas. Good old roll on contact cement did the trick. Holy adequate ventilaton, Batman!!
Logged

Mike in Tacoma

"aww, what the hell - let's just do it".............

Bike #833
100cc A/G, A/F and APS/G (in 2019)
55chevr
Hero Member
*****
Online Online

Location: Long Island, NY
Posts: 2239





Ignore
« Reply #122 on: February 21, 2015, 09:46:23 PM »

I have used Liquid Nails when assembling a plug ... you cannot get it near the edges as it sets up pretty hard and tough to shape ...
Logged
sofadriver
Sr. Member
****
Offline Offline

Age: 68
Location: tacoma, wa
Posts: 518





Ignore
« Reply #123 on: February 22, 2015, 01:12:27 AM »

Liquid nails............wish I'd thought of that.
Logged

Mike in Tacoma

"aww, what the hell - let's just do it".............

Bike #833
100cc A/G, A/F and APS/G (in 2019)
tauruck
Hero Member
*****
Offline Offline

Age: N/A
Location: Johannesburg, South Africa
Posts: 4770





Ignore
« Reply #124 on: February 22, 2015, 01:50:03 AM »

You're right. Ive got one. Dont think I could do this without it. I'd sure like to find one that was deeper, though.

That is the only draw back. I use it in full, mark the area halfway on both the gauge and plug. Then do the same on cardboard.
Move the gauge starting at the mark and reset. Then transfer to the cardboard and cut a template/profile.
I think you're probably doing something similar anyway. wink

This stuff isn't easy but the rewards are awesome. You're doing great. I'm subscribed. grin cheers cheers cheers
Logged

sofadriver
Sr. Member
****
Offline Offline

Age: 68
Location: tacoma, wa
Posts: 518





Ignore
« Reply #125 on: February 22, 2015, 02:27:40 AM »

On wood ribs and panels in the boats I've restored, I've always just used a compass (or any old stick with a marker taped to it) to copy shapes. That way I can sand my way down to a perfect fit. Can't do that here because one "oops" and it's all over.  grin Besides, these contour gauges are so much easier.

http://hostedmedia.reimanpub.com/TFH/Step-By-Step/FH02NOV_SCRIBI_10.JPG
BTW, one neat thing about this old technique is that you can substitute a rod of almost any length for the compass. On my current boat I had to copy the shape of one of the hull ribs below deck and couldn't get the plywood I was copying onto closer than about 36" from the rib. The rib section was about 40" tall. I just taped a marker at the 36" mark of a stick and copied it. You just have to keep the stick (compass) at a constant level the whole way.
« Last Edit: February 22, 2015, 02:56:53 AM by sofadriver » Logged

Mike in Tacoma

"aww, what the hell - let's just do it".............

Bike #833
100cc A/G, A/F and APS/G (in 2019)
sofadriver
Sr. Member
****
Offline Offline

Age: 68
Location: tacoma, wa
Posts: 518





Ignore
« Reply #126 on: February 23, 2015, 12:31:57 AM »

I got the belly pan done today and used foam in a can to fill the openings around all my foam blocks. No matter how hard you try, you can't control that stuff. It's just a gooey mess. Fortunately it cuts to shape easily and it really locked in the blocks. Looks weird, huh?

I'm going to have to paint this foam before I can apply the aluminum tape. The tape won't hold on this type of foam.  sad

The paint marks are where I checked both sides with the contour gauge. I got both sides to match at those lines and then sanded any imperfections down to the paint lines. The sides are as close to symmetrical as I'm ever going to get them.


* 2015-02-22 16.06.09.jpg (146.29 KB, 640x480 - viewed 152 times.)
« Last Edit: February 23, 2015, 12:42:03 AM by sofadriver » Logged

Mike in Tacoma

"aww, what the hell - let's just do it".............

Bike #833
100cc A/G, A/F and APS/G (in 2019)
bones
Full Member
***
Offline Offline

Age: 62
Location: sydney Australia
Posts: 128




Ignore
« Reply #127 on: February 23, 2015, 02:08:04 AM »

Hey Sofa

   Don't let the finished plug stand in the sun.
  The spray foam has much more air in it and it will blister.
  I used the same method using surfboard  foam and spray foam with a layer of body filler  to give a smooth surface.
 While I was talking to the fiberglass guy the plug blistered all over. I assume from the air expanding in the foam.

    cheers   Bones
Logged
tauruck
Hero Member
*****
Offline Offline

Age: N/A
Location: Johannesburg, South Africa
Posts: 4770





Ignore
« Reply #128 on: February 23, 2015, 08:18:09 AM »

Good advice Bones. cheers cheers cheers

Hey Mike, the Spray 77 is OK with Poly but remember you need very little.
Logged

sofadriver
Sr. Member
****
Offline Offline

Age: 68
Location: tacoma, wa
Posts: 518





Ignore
« Reply #129 on: February 23, 2015, 11:43:37 AM »

These tips are great, guys.
I always say I may not know much - but I know who to ask!   cheers
Logged

Mike in Tacoma

"aww, what the hell - let's just do it".............

Bike #833
100cc A/G, A/F and APS/G (in 2019)
sofadriver
Sr. Member
****
Offline Offline

Age: 68
Location: tacoma, wa
Posts: 518





Ignore
« Reply #130 on: February 23, 2015, 11:32:47 PM »

Got the top fairing sanded to final shape.  grin

I shaped and rough sanded the section between the top fairing and the bottom. That curve in the pic, and how it's going to mesh with the front fender, is the only part of this build that I haven't been able to see in my head (you know, while I'm sitting on the can planning all this rolleyes). Now that I can see it in the flesh it seems to be coming out well and should be slippery. The taper stops at that curved mark. I'd like to hear any opinions on this, please.


* 2015-02-23 18.55.33.jpg (138.2 KB, 640x480 - viewed 154 times.)

* 2015-02-23 18.56.06.jpg (145.47 KB, 640x480 - viewed 143 times.)
Logged

Mike in Tacoma

"aww, what the hell - let's just do it".............

Bike #833
100cc A/G, A/F and APS/G (in 2019)
tauruck
Hero Member
*****
Offline Offline

Age: N/A
Location: Johannesburg, South Africa
Posts: 4770





Ignore
« Reply #131 on: February 24, 2015, 01:04:41 AM »

I don't really understand what you're getting at about the curve
but what you've done so far is as professional a job as I've seen.

It will come to you.

Pro job Mike. cheers cheers cheers cheers
Logged

bones
Full Member
***
Offline Offline

Age: 62
Location: sydney Australia
Posts: 128




Ignore
« Reply #132 on: February 24, 2015, 01:29:46 AM »

Sofa
   You're doing it wrong ( sitting on the can )
  You need the special thinking stool and a beer and sit and look at the bike---   eventually it will tell you what is needed grin
  Some times it takes a few beers
  
   With the latest picture and the email I think you are on a winner
   Are you going to use a water tank or a radiator?

    Bones
« Last Edit: February 24, 2015, 01:31:42 AM by bones » Logged
generatorshovel
Sr. Member
****
Offline Offline

Age: 65
Location: Outback Australia
Posts: 401



WWW

Ignore
« Reply #133 on: February 24, 2015, 04:03:11 AM »

Sofa
   You're doing it wrong ( sitting on the can )
  You need the special thinking stool and a beer and sit and look at the bike---   eventually it will tell you what is needed grin
  Some times it takes a few beers
  
   With the latest picture and the email I think you are on a winner
   Are you going to use a water tank or a radiator?

    Bones
Yep, a milk crate works for me
Logged

Tiny (in OZ)
I would prefer to make horsepower, rather than buy, or hya it, regardless of the difficulties involved , as it would then be MINE
Koncretekid
Hero Member
*****
Offline Offline

Age: 71
Location: Yarmouth, Nova Scotia & Lafayette, Co.
Posts: 1064





Ignore
« Reply #134 on: February 24, 2015, 06:23:54 AM »

I can't really tell where your head will be when you're in riding position, but from your post # 43, it looks like the front of your helmet is just about in line with a vertical line at the back of the front wheel.  Are you sure your bodywork is not going to enclose part of your head, which is not permitted?  And the further back you position your body and head, the less peripheral vision you will have which can get confusing at speed. Otherwise, it looks like you've nailed the perfect shape so far.
Tom
Logged

We get too soon oldt, and too late schmart!
Life's uncertain - eat dessert first!
Pages: 1 2 3 4 5 6 7 8 [9] 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.21 | SMF © 2015, Simple Machines
Simple Audio Video Embedder
Valid XHTML 1.0! Valid CSS!


Google visited last this page May 09, 2018, 03:53:18 PM