RunRyder RC Helicopter Topic - Freya / GV-1 Magnet Mounting

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HIROBO Turbulence - SDX - Freya - Sceadu > Freya / GV-1 Magnet Mounting

lowandslow
Key Veteran
Location: Spring Hill, TN

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Am I seeing things? There appears to be a factory drilled hole for the magnet in the Freya plastic fan.

The hole (not all the way through the fan) is in the exact location it needs to be and fits the magnet perfectly. Maybe is was drilled at the factory for balance purposes?

11-09-2001 Over year old.

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DrScoles
Veteran
Location: Redmond WA

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Wasn't that nice of Hirobo to do that for us??? They did it on the Sceadu too. Not sure if it matters, but on one of mine, I drilled another hole and glued another magnet opposite the other one for balance purposes. However, I didn't do that on my next one and didn't notice any difference...

Mike

11-09-2001 Over year old.

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z11355
rrMaster
Location: New England

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Yes, that is what it is there for.

The more powerful Radio Shack magnet is a little too large
though. IMO, putting the second magnet in to counterbalance
it is of questionable value.

11-09-2001 Over year old.

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lowandslow
Key Veteran
Location: Spring Hill, TN

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Amazing. Nice touch Hirobo!

11-09-2001 Over year old.

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lowandslow
Key Veteran
Location: Spring Hill, TN

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Freya Gear Ratio?

BTY, what's the ratio on the Freya. I think it's 9.5?

11-09-2001 Over year old.

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Dave_D
Key Veteran
Location: Philippines

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Yep... in stock form it's 9.5, it's on the front page of the manual. If you wanna know the computation its;

Main gear teeth / Pinion gear teeth = Gear ratio
95/10 = 9.5
93/10 = 9.3

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lowandslow
Key Veteran
Location: Spring Hill, TN

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Great, thanks!

11-09-2001 Over year old.

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rob_jones
Key Veteran
Location: Oglethorpe, GA

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Dumb question

What's the purpose of the magnet? I've never heard of that.

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Team MRC Hirobo
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lowandslow
Key Veteran
Location: Spring Hill, TN

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The imbedded magnet rotates with the fan and triggers the sensor that's mounted underneath. That's how the governor knows what RPM the engines at.

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Ken B
Elite Veteran
Location: Phoenix, AZ

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The magnet is what a GV-1 Govenor works with the electronic sensor Which picks up the magnetic field as it passes over the sensor. The Govenor uses that for adjusting engine speed to what ever is set.

Ken B

11-09-2001 Over year old.

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rob_jones
Key Veteran
Location: Oglethorpe, GA

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Cool!

Boy, if you leave the hobby for a few years, you sure do miss a lot. That's some really trick hardware. I may have to look into that!

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I reject your reality and substitute my own.

11-09-2001 Over year old.

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Maxx
Key Veteran
Location: Shreveport Louisana

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I use a GV-1 on my Futura but after having the magnets come loose three times I built an optical sensor that triggers off a 1/2" wide peice of foil...the foil doesn't weigh anything so no re-balancing of the fan is required! the infrared source/sensor is available from Allied Signal (pn#OPB703) for about $5.00 or less...add an old servo lead and two Radio Shack resistors and you're good to go!

11-09-2001 Over year old.

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RappyTappy
rrProfessor
Location: Las Vegas, NV

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BimmerM3, yea I was out of the hobby for a couple of months one time and when I came back, all my stuff was "old". Gyros have probably seen the most change recently. Helicopter kits too have changed drastically also.

Chris

11-09-2001 Over year old.

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rob_jones
Key Veteran
Location: Oglethorpe, GA

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Long time

Tell me about it, Rappy.

You should've seen my face when I found out that my "old fashioned" GYROSCOPE gyro was obsolite. I paid, like, $200 for it. I ended up getting a CSM 180 for $89 and it is SO much better. I suppose it's progress...

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DrScoles
Veteran
Location: Redmond WA

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Maxx,

No night flying huh