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Hanger 9 DVT

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Old 10-15-2006, 01:00 PM
  #1  
flynte
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Default Hanger 9 DVT

I'm working on finishing a Super Decathlon. I put in a Saito 72 with a 13x8 APC prop. I'm trying to do the breakin on the motor but can't get a good reading from the tach. I have flouresent lighting in my shop, and am getting a 360 reading on the tach from the lighting which shows it's working fine, but cant get a good reading off the prop. I have tried putting a flashlight behind the prop so the tach could read from it but that hasn't worked out. Anybody else run into this problem and have found a way around it.

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Old 10-15-2006, 06:45 PM
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Default RE: Hanger 9 DVT

Take it outside... I've never had any luck at all getting a prop reading in doors... it should be fairly clear and sunny outside to give you the best readings.

John
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Old 10-15-2006, 11:54 PM
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Default RE: Hanger 9 DVT

I can tell you that I get better readings on my hobbico tach than i do with the DVT. The DVT works but I get a pretty large variable reading, usually + or - 800 rpms or so. While my Hobbico tach usually gives me a little more accurate reading. The DVT was my first "cool" toy as it did everything. I still use it as a loaded voltmeter for my 6 volt batterys but, thats it.
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Old 10-16-2006, 01:45 PM
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Default RE: Hanger 9 DVT

Outside is losing it's appeal. Overcasted with showers and some snow here and there. I might try setting up a halogen light behind the plane tonight and see if that'll work.

thanks

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Old 10-16-2006, 06:27 PM
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Default RE: Hanger 9 DVT

flynte, I hope you have EXCELLENT ventilation in your shop... with my garage door open... even with the engine set up right at the opening prop blowing the smoke out, I still needed 2 fans blowing to stay alive[X(] this was the first and LAST time I used a rainy day to break in a Saito 4 stroke.

John
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Old 10-17-2006, 07:56 PM
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Default RE: Hanger 9 DVT

Got 2 good cfm exhaust fans and the pedestrian door open and it does get fair full in there by the end of the tank, but it does clear out fairly quickly.

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Old 10-18-2006, 09:00 AM
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Default RE: Hanger 9 DVT


ORIGINAL: flynte

Outside is losing it's appeal. Overcasted with showers and some snow here and there.
I only use the H9 DVT as a volt meter. If you want an excellent tach, get a TNC. It can read in overcast or dim lighting conditions up to 5-6 feet away from the prop.
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Old 10-18-2006, 01:33 PM
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Default RE: Hanger 9 DVT

ORIGINAL: Richard L.


ORIGINAL: flynte

Outside is losing it's appeal. Overcasted with showers and some snow here and there.
I only use the H9 DVT as a volt meter. If you want an excellent tach, get a TNC. It can read in overcast or dim lighting conditions up to 5-6 feet away from the prop.
What manufacturer makes this so I can try to track one down. Sounds like a good tach

thanks

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Old 10-18-2006, 01:52 PM
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Default RE: Hanger 9 DVT

These things work off of a good light contrast and to be frank indoor lights just come no where near the IR levels of outdoors. IIRC at my last company we made a product that did something where the contrast was important, and to test we went out and got car headlights and used them to gives us a reasonable amount of light in doors.
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Old 10-18-2006, 02:06 PM
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Default RE: Hanger 9 DVT


ORIGINAL: flynte

What manufacturer makes this so I can try to track one down. Sounds like a good tach
You can read about it and order one from here: [link]http://www.fromeco.org/shop/atnc%20tach.htm[/link]

It's a good investment. There was a good thread on this tach in the engine forum. Might worth doing a search for it.
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Old 10-18-2006, 02:07 PM
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Default RE: Hanger 9 DVT

I tached my engine once after dusk when the sun was well down, and the tach functioned just fine.
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Old 10-18-2006, 11:00 PM
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Default RE: Hanger 9 DVT

Thanks for the lead Richard! I got my order in tonight.

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Old 10-31-2006, 01:11 AM
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Default RE: Hanger 9 DVT

Good day today, not only did my TNC show up, but my skis for my Kadet Senior did also . Now we can get the Saito tuned and get the senior tuned and skied up. Got there T-shirt also [sm=punching.gif]

thanks again Richard for the tach lead

flynte
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