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Deflection Gauge

Old 06-25-2006, 07:43 PM
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Balsacutter
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Default Deflection Gauge

I've been setting up control surface throws with a ruler, but I've never been happy with the accuracy of the measurements. I'm a diehard DYI type so I've experimented with various reverse-protractor cut-outs, level gauges on clothspins, etc. but everything still moves around way too much to get any real precision.

I came over here to the IMAC forum thinking you guys are all about precision adujstments to your setups, what do you use to measure your throws? One of the commercial gauges? How do they grip the reference surface, and indicate the control throw?

-Balsacutter
Old 06-25-2006, 09:09 PM
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murry
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Default RE: Deflection Gauge

www.hppilots.com
Old 06-25-2006, 11:05 PM
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flyinrazrback
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Default RE: Deflection Gauge

http://www.horizonhobby.com/Products...?ProdID=HAN192

I know several people have had good luck with these.
Old 06-26-2006, 08:49 AM
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bhanley
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Default RE: Deflection Gauge

Pricey but the best - http://www.aeroperfect.com/
Old 06-26-2006, 12:33 PM
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stek79
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Default RE: Deflection Gauge

Take also a look at this idea, which is very cheap and can give much more precise and repeatable measurements than most of the gauges that you can buy:

http://www.rcaerobats.net/DeflectionGauge.htm

Bob Pastorello and I tested it, and in particular he told me that with such a device he was able to MEASURE one step of subtrim of his JR10x.
Old 06-26-2006, 01:30 PM
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Balsacutter
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Default RE: Deflection Gauge

Excellent, Stek79!

I will dream about owning one of those beautiful digital gauges someday (especially for accurate wing incidence measurements), but for a Do-It-Yourself person like myself, the clever protractor-and-plumbline solution for a deflection gauge looks like it's worth a try.

From the pictures it's hard to see your method of mounting the protractor card to the plastic clamp. It looks like the depron card is attached to a little arm epoxied to the clamp? Does the card mount pivot somehow to set a zero-deflection reference point? If so, how do you make the pivot strong enough?

By the way Stek79, you have nothing to apologize about your excellent English. Perfectly understandable. I think it's a great thing to have a models bring together a multi-national group.

-Balsacutter

Old 06-26-2006, 01:49 PM
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stek79
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Default RE: Deflection Gauge

Balsacutter,
many thanks for the compliments!!!!!

I have other pictures that can help to understand the gauge, if you want send me a PM with your mail, I'll be very glad to send them to you!

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