DA 120 with onboard Tach.

[IMAC FANATIC]

Can't seem to find that adjustable mount, can someone post a linkee here directly to source.
Pardon, I'm being impatient, I'll wait to see what you come up with and follow your lead.

 

[Alky6]

Here are a couple of sources I found searching through images on google. Can't say anything about the vendors or the product other than it looks the same as the one Dimes posted and others I have seen. I have the same one that you posted above, but I also have the VVRC 40cc twin which is an RCexcel system.
http://www.thunderboltrc.com/index....products_id=1251&zenid=GpiiJiLE012ef1A4GB0r93

http://www.ebay.com/itm/like/290924398383?lpid=82

 

[49dimes]

I think you will want the one that Dimes has posted earlier as I believe the hall effect sensor is magnetic polarity sensitive and the sensor may need to be rotated for DA's positioning of the magnet? I am not sure on that one. Dimes?

Yes you are correct. DA engines hub magnet has the south pole facing up. When inserting the semiconductor in to its housing make sure it faces it correctly by having the face which has the beveled sides facing the magnet. Study the picture.

 

[49dimes]

Hobby king or SDS Hobby will have everything usually in stock. Lots of ignition and battery support at the USA warehouses now.

www.hobbyking.com
www.sdshobbyusa.net

 

[IMAC FANATIC]

OK, starting to get the idea finally, can you tell I'm not electrically inclined. LoL
so a second hole will have to be drilled and tapped on the engine to secure the mounting plate . dang I wish I'd of done this before I mounted the engine , pipes, etc.

 

[IMAC FANATIC]

@orthobird any chance you could post a pic of your optical system at the pick up point, like to see the bracket you've used.

 

[Alky6]

Hobby king or SDS Hobby will have everything usually in stock. Lots of ignition and battery support at the USA warehouses now.

www.hobbyking.com
www.sdshobbyusa.net

thanks!

 

[Alky6]

OK, starting to get the idea finally, can you tell I'm not electrically inclined. LoL
so a second hole will have to be drilled and tapped on the engine to secure the mounting plate . dang I wish I'd of done this before I mounted the engine , pipes, etc.

That's ok. You build one helluva nice plane!

Only one hole? thought there were two in addition to the two to mount the magnetic pickup?

 

[IMAC FANATIC]

Still at work, can't verify that till I get out to shop tomorrow, but I believe that's what I noticed . hoping I'm wrong.

 

[IMAC FANATIC]

Happily wrong, there's holes at 180° from the top.