(Note: Donations are not tax deductible)

This is a public forum. The opinions expressed here don't
necessarily reflect the feelings of The Folks That Run The Site (that's us)
unless we explicitly say so, ok?


Forum's been "upgraded".
Things will look a bit different.
A *few* posts might have gotten lost in the crossover.
PM bobc with problems, or post in "Website Suggestions".

Author Topic: 2nd 100cc APS build  (Read 100021 times)

0 Members and 1 Guest are viewing this topic.

Offline Speed Limit 1000

  • Hero Member
  • *****
  • Posts: 1092
  • Age: 69
  • Location: Denver, Colorado
Re: 2nd 100cc APS build
« Reply #120 on: February 21, 2015, 01:56:03 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.
John Gowetski, red hat @ 221.183 MPH MSA Lakester, Bockscar #1000 60 ci normally aspirated w/N20

Offline sofadriver

  • Sr. Member
  • ****
  • Posts: 518
  • Age: 68
  • Location: tacoma, wa
Re: 2nd 100cc APS build
« Reply #121 on: February 21, 2015, 02:20:54 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!!
Mike in Tacoma

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

Bike #833
100cc A/G, A/F and APS/G (in 2019)

Offline 55chevr

  • Hero Member
  • *****
  • Posts: 2241
  • Location: Long Island, NY
Re: 2nd 100cc APS build
« Reply #122 on: February 21, 2015, 08:46:23 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 ...

Offline sofadriver

  • Sr. Member
  • ****
  • Posts: 518
  • Age: 68
  • Location: tacoma, wa
Re: 2nd 100cc APS build
« Reply #123 on: February 22, 2015, 12:12:27 AM »
Liquid nails............wish I'd thought of that.
Mike in Tacoma

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

Bike #833
100cc A/G, A/F and APS/G (in 2019)

Offline tauruck

  • Hero Member
  • *****
  • Posts: 4883
  • Location: Johannesburg, South Africa
Re: 2nd 100cc APS build
« Reply #124 on: February 22, 2015, 12:50:03 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. :-D :cheers: :cheers: :cheers:

Offline sofadriver

  • Sr. Member
  • ****
  • Posts: 518
  • Age: 68
  • Location: tacoma, wa
Re: 2nd 100cc APS build
« Reply #125 on: February 22, 2015, 01:27:40 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.  :-D 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, 01:56:53 AM by sofadriver »
Mike in Tacoma

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

Bike #833
100cc A/G, A/F and APS/G (in 2019)

Offline sofadriver

  • Sr. Member
  • ****
  • Posts: 518
  • Age: 68
  • Location: tacoma, wa
Re: 2nd 100cc APS build
« Reply #126 on: February 22, 2015, 11:31:57 PM »
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.  :-(

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.
« Last Edit: February 22, 2015, 11:42:03 PM by sofadriver »
Mike in Tacoma

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

Bike #833
100cc A/G, A/F and APS/G (in 2019)

Offline bones

  • Full Member
  • ***
  • Posts: 130
  • Age: 62
  • Location: sydney Australia
Re: 2nd 100cc APS build
« Reply #127 on: February 23, 2015, 01:08:04 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

Offline tauruck

  • Hero Member
  • *****
  • Posts: 4883
  • Location: Johannesburg, South Africa
Re: 2nd 100cc APS build
« Reply #128 on: February 23, 2015, 07:18:09 AM »
Good advice Bones. :cheers: :cheers: :cheers:

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

Offline sofadriver

  • Sr. Member
  • ****
  • Posts: 518
  • Age: 68
  • Location: tacoma, wa
Re: 2nd 100cc APS build
« Reply #129 on: February 23, 2015, 10:43:37 AM »
These tips are great, guys.
I always say I may not know much - but I know who to ask!   :cheers:
Mike in Tacoma

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

Bike #833
100cc A/G, A/F and APS/G (in 2019)

Offline sofadriver

  • Sr. Member
  • ****
  • Posts: 518
  • Age: 68
  • Location: tacoma, wa
Re: 2nd 100cc APS build
« Reply #130 on: February 23, 2015, 10:32:47 PM »
Got the top fairing sanded to final shape.  :-D

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 :roll:). 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.
Mike in Tacoma

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

Bike #833
100cc A/G, A/F and APS/G (in 2019)

Offline tauruck

  • Hero Member
  • *****
  • Posts: 4883
  • Location: Johannesburg, South Africa
Re: 2nd 100cc APS build
« Reply #131 on: February 24, 2015, 12:04:41 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:

Offline bones

  • Full Member
  • ***
  • Posts: 130
  • Age: 62
  • Location: sydney Australia
Re: 2nd 100cc APS build
« Reply #132 on: February 24, 2015, 12:29:46 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 :-D
  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, 12:31:42 AM by bones »

Offline generatorshovel

  • Sr. Member
  • ****
  • Posts: 404
  • Age: 65
  • Location: Outback Australia
    • http://www.dlra.org.au/forum/viewtopic.php?t=556
Re: 2nd 100cc APS build
« Reply #133 on: February 24, 2015, 03:03:11 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 :-D
  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
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

Offline Koncretekid

  • Hero Member
  • *****
  • Posts: 1093
  • Age: 71
  • Location: Yarmouth, Nova Scotia & Lafayette, Co.
Re: 2nd 100cc APS build
« Reply #134 on: February 24, 2015, 05:23:54 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
We get too soon oldt, and too late schmart!
Life's uncertain - eat dessert first!