>
>
> Barry,
>
> I figured out how to possibly build and use this inclinable comb
> manometer to measure the flatness of the of the Alfa heads.
>
> 1.(Build the manometer) Fill a 6 ft long 1/4 inch (inner
> diameter)plastic tube about 1/2 full with a fluid of your choice. (fluid
> choice is determined by how you want your meniscus to appear, viscosity,
> and adhesion to the tube you are using, typically use just water)
> 2. (Make it inclinable) bend the tube about 1/3 along it's length with
> the short end vertical and the long end at some incline of your choosing
> based on your fluid and tube surface characteristics.
> 3. Thoroughly clean the surface plate and the Alfa heads along the
> surface of contact. Lay the Alfa head on the surface plate.
> 4. Make a cylindrical device that will fit into the spark plug holes.
> This device shall have 2 holes in it with a rubber gasket that fits on
> it to seal it when it is screwed into the Alfa head. Attach the
> cylindrical device to the head. Plug all other holes in the Alfa head.
> 5. Connect one hole to the short end of the manometer. Connect the
> other hole to a device that can deliver a preset amount of air into the
> second hole.
> 6. Deliver the preset amount of air and then note the initial position
> of the fluid on the inline and the rate of change on the inclinable
> manometer.
> 7. The rate of change should be an indication of the air leakage from
> between the Alfa head and the surface plate.
> 8. This procedure could possibly be improved by putting a light fluid
> between the Alfa head and the surface plate.
>
> Hope this helps ;-)
> Bob
Couldn't you just implement (6) and (8) and look for the bubbles? Bill,
not to be toyed with! in Boulder
------------------------------------
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/GrizHFMinimill/
<*> Your email settings:
Individual Email | Traditional
<*> To change settings online go to:
http://groups.yahoo.com/group/GrizHFMinimill/join
(Yahoo! ID required)
<*> To change settings via email:
GrizHFMinimill-digest@yahoogroups.com
GrizHFMinimill-fullfeatured@yahoogroups.com
<*> To unsubscribe from this group, send an email to:
GrizHFMinimill-unsubscribe@yahoogroups.com
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/