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HomeAircraftHelicopterMain Discussion › Nuremburg Show and New Webra Motor (it has electronics inside...???)
02-08-2006 04:43 AM  12 years agoPost 1
JitsuGuy

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Tulsa, Oklahoma

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Here are the pics... Is it a governor or remote glow or what? Oh yeah and it's a 91.

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02-08-2006 04:50 AM  12 years agoPost 2
JitsuGuy

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Tulsa, Oklahoma

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Looks like they have a new 50 motor too except theirs is a 55.

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02-08-2006 04:50 AM  12 years agoPost 3
RCfan

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Longwood, FL USA

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Looks like both a remote glow and crank sensor, pretty cool!

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02-08-2006 05:27 AM  12 years agoPost 4
Salty

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St. Augustine

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A alternative to the YS .50 that came out, then disappeared off the face of the earth? AMEN!!!

.91 looks sweet as well...wonder how the trons hold up int he guts of the engine....sometimes I think simpler is better but that does look awesome!!!!wonder how it'll perform?

Ask your Doctor if getting off your ass is right for you.

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02-08-2006 05:33 AM  12 years agoPost 5
andyp

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New Zealand

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Actually the new Webra 91 is a petrol (gas) engine. Thats an ignition module on the rear of the engine. It will no doubt have less power than a glow engine, but be realllllyyyy economical to run.

Andrew

QuickUK Flight Team
Fromeco Regulators and Batteries

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02-08-2006 05:37 AM  12 years agoPost 6
JitsuGuy

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Tulsa, Oklahoma

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Ahh, you're right... Now that you say that, I do notice the bigger diameter fuel tubing. Interesting.

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02-08-2006 05:38 AM  12 years agoPost 7
dkshema

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Cedar Rapids, IA

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Looks like it uses crank-case pressure and a check valve through that novel combination nipple/backplate screw. I would guess, then, that the carb also has a pressure regulator. Looks as if Webra took a page from YS engines.

Not sure what to make of the glow-plug connection to the blue doo-dad that mounts on the backplate, though. Can't be a governor, as you don't regulate a glow-engine's RPM by messing around with the glow plug. Once it's up and running, the plug stays hot due to the presence of rhodium and platinum in the element, and the presence of nitro and methanol in the fuel -- catalytic reaction.

I'm guessing the glow-plug thingy is Webra's answer to remote head-locks that break all the time and that need some kind of place to mount them that the heli manufacturers never planned for.

The guess that a crankshaft sensor is part of the wiring is good -- that would certainly solve the problem of having to mount an optical or hall-effect sensor up on the fan for use with a governor. It does, however, assume that the governor would be capable of using an RPM indication straight off the crank, and not off the slower speed side of a gear-reduction unit.

Dave

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02-08-2006 05:45 AM  12 years agoPost 8
dkshema

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Cedar Rapids, IA

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Andyp has a good eye...found this on the Webra website:

Ignition and gasoline version, all-in-one.

http://www.webra-austria.at/motor.p...ELI&lang=EN

There's more here:

http://www.webra-austria.at/index1.php?lang=EN

Scroll down after you read about the .91 and see the stand-alone spark-ignition system, and read that it can be used with either gasoline, or alcohol-based engines.

Dave

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02-08-2006 05:46 AM  12 years agoPost 9
Chris Bergen

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cassopolis, MI USA

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ignition system?

Chris D. Bergen

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02-08-2006 05:59 AM  12 years agoPost 10
dkshema

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Cedar Rapids, IA

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Rated at 3 horsepower, 2,000 to 16,000 RPM. Weighs 780 grams.

Compare that to the OS 91 SZ-H Cspec PS which is rated at 3.1 horsepower (at 15,000 RPM), 2,000 to 16,000 RPM, but weighs 581 grams, nearly 200 grams less (about 0.44 POUNDS LIGHTER than the Webra).

For people working to shed weight on their helis for better performance, the Webra doesn't seem to be all that appealing. Fuel cost may be a different matter, though.

Dave

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02-08-2006 06:01 AM  12 years agoPost 11
Helipilot01

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ColliervilleTn

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Chris,

I think your right. It looks like a powered coil( Like and automobile ignition) and possibly uses the crankshaft as a timing device. If that's so,the timing could be retarded for smooth hover and advanced for power! Cool!

Mike Fortune
Fortune Model Products

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02-08-2006 06:03 AM  12 years agoPost 12
dkshema

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Cedar Rapids, IA

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It plugs into your receiver and can be controlled by your TX.

Dave

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02-08-2006 06:08 AM  12 years agoPost 13
dkshema

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Cedar Rapids, IA

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But, it comes at an additional cost -- an extra battery in your heli, or additional drain from your existing flight pack.

input voltage --------- 3,6 - 8V
output voltage -------- approx. 24kV (24.000V) at 5V input voltage
idle current drain ---- approx. 10mA
current drain --------- approx. 250mA at 5V and 10.000rpm

A quarter of an amp at 10,000 RPM. That's some serious continuous power requirement. Looks like that additional 200 grams for the motor alone (over the Cspec PS) needs an additional 200 grams or so of battery. Now, you're carrying about an extra pound in your heli to have spark ignition. Is it worth it???

Dave

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02-08-2006 02:44 PM  12 years agoPost 14
JitsuGuy

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Tulsa, Oklahoma

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Not being a gasoline guy, I sure don't know if it's worth it or not.

So we compared it to a glow engine, but how does it fair against other gasoline engines in the power and weight department?

What about those 55 engines? More power for a 50 size... Can't be a bad thing.

J

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