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jakent(at)unison.ie
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 Posted: Wed Oct 10, 2007 1:49 am Post subject: ASI question |
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If the asi is off by the same arc segment over the entire range, the pointer
shaft gear may have jumped a few cogs. You could try removing the pointer
and replacing it in the correct position and then check the calibration.
The pointer should pop off if you put a piece of cloth/cardboard at each
side to protect the dial and use two (padded if possible) screwdrivers, one
on each side to lever it up without putting any side load on the shaft.
Press it back in the correct position (repeat as necessary! - I have just
replaced a dial and pointer for an 'authentic' Cub asi so guess why I say
that!).
J.Kent RV-4 EI-DIY.
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Doug Gray
Joined: 10 Jan 2006
Posts: 112
Location: Sydney, Australia
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| Posted: Wed Oct 10, 2007 12:07 pm Post subject: ASI question |
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This just doesn't seem right. I find it difficult to believe an
instrument like this has no better way for adjusting cal.
Looking into the pitot port I see a slotted collar (nut?) and in the
static port what might be a small lever. I am thinking these may be
part of an adjustment mechanism.
Any instrument fitters/mechanics out there?
Doug Gray
On Wed, 2007-10-10 at 10:42 +0100, John Kent wrote:
| Quote: | If the asi is off by the same arc segment over the entire range, the
pointer
shaft gear may have jumped a few cogs. You could try removing the
pointer
and replacing it in the correct position and then check the
calibration.
The pointer should pop off if you put a piece of cloth/cardboard at
each
side to protect the dial and use two (padded if possible)
screwdrivers, one
on each side to lever it up without putting any side load on the
shaft.
|
| | - The Matronics RV-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV-List |
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