SD-20 Tach Drive Options

[tx_jayhawk]

All,

As others have encountered, it appears that many of the tach senders don't fit with the SD-20 standby alternator on the vaccum pad. I would be curious what feedback others might offer on the following:

1) Will one of the 90 degree tach senders that Spruce sells fit with the SD-20 (and UMA tach sender)? They of course did not have any dimensions to speak of on the website. If it does fit, does anyone know the difference between the two models that they sell?

2) If the 90 degree adapters don't work, how are people remote mounting their senders? I assume a short cable to the firewall then possibly securing via adel clamp to the firewall?

Thanks,
Scott
7A Finishing

[Bill Palmer]

Scott,

Here's a related thread with respect to clearance between the tach drive and an SD-8 alternator.

http://www.vansairforce.com/communit...highlight=SD-8

You could also search "SD-8" to find the thread.

I don't know how applicable this thread is to the SD-20, but the pictures might give you some idea, anyway.

Best Regards,

Bill Palmer