MANUAL:
https://audacitymodels.com/downloads/G720HV-Gyro-manual
Note: This download is 20.9 MB. Right-click on the link above and save to your computer.
THIS PRODUCT HAS BEEN DISCONTINUED. IF YOU ADD THE PRODUCT TO YOUR CART, NO PHYSICAL PRODUCT WILL BE SENT. THE LISTING IS STILL DISPLAYED TO PROVIDE ACCESS TO THE MANUAL.
If you have purchased a used G74720MHV, below is the description of this gyro.
Looking for a dedicated single-axis gyro to control the tail rotor of your flybar-equipped model helicopter? You've just found a nice one that won't break the bank! Set it up for either rate-mode or heading hold-mode and fly with more confidence.
Think gyros are just for helicopters? Think again, because gyros can be pretty handy for fixed wing models too. For example, a Pitts Special can be a tough model for many because it's so short coupled it wants to swap ends (even when you're paying close attention).
But now, simply routing the rudder servo through the GY720 gyro and setting it to rate-mode means it instantly senses the loss of heading before you can even begin to see it. After all, because your head isn't inside the cockpit to sense and make micro corrections, you're relying on your eyes to sense the beginning of yaw. This can be nearly impossible with short coupled models!
However, by using a gyro to instantly correct with rudder - quicker than most can possibly recognize the situation - this little bit of technology lends you a hand. And no, it's not flying for you because it's just momentarily compensating for sudden rates of yaw, thus helping you be better pilot!
Pilots who love flying twin-engine models benefit especially because if you lose an engine the model can snap to inverted so fast you can't save it. Now, just by routing the rudder servo through the gyro set to rate mode means it'll maybe buy you the precious seconds needed to recognize what's going on and react. Think of this as cheap insurance for the inevitable engine out situation when asymmetrical thrust is going to immediately yaw the model. You know when Murphy will strike, too . . . when the model is too far away to easily determine which engine just crapped out. Go the wrong way with rudder and just like that, it's done. Toothpicks.
Another great candidate for a GY720 gyro on rudder is a high powered aircraft like a scale P-51 Mustang. With this tail dragger, opening the throttle to initiate the take off roll with a little too much aggression means P-factor (torque) drags the nose off to the left - often before the model's rolling along with enough airspeed . . . unless you're on top of things and give it a lot of corrective right rudder immediately!
And because this even happens to highly experienced pilots - ones who know to add a bit of right rudder before applying power - it can happen to anybody! Worse, while it usually results in an aborted takeoff, how many times have you seen someone plow-on, e.g. grab a handful of elevator and stagger into the air . . . usually while departing over the pits? That's bad, we all know it, and one thing that really help in this situation is avoiding it altogether. This gyro can help.
Installing this solid-state gyroscope is easy. Just attach it using double stick tape, Velcro, or our favorite, a dab of Show Goo (much tougher than silicone RTV and plug your rudder servo to it, then connect it to the receiver exactly where the rudder was. Then, if the model is fixed wing, set it to rate mode, heading hold if it's a helicopter, and go fly! You can even turn it on and off remotely with a spare channel.
Make no mistake; for what amounts to a minor investment in the overall cost of your model, you can greatly increase the margin of control and safety when you're at the field. So whether fitted to a helicopter, or a giant scale gasoline-powered Spitfire, this is an important tool in your bag of tricks because it helps you be a better pilot.
And don't let the low price fool you. Fact is, the design of the G720HV looks simple but is actually rather sophisticated. Basically, you can use it with pretty much any servo. For example, it doesn't matter whether it's attached to a 3-pole, coreless, or brushless motor servo. Analog or digital doesn't matter to the G720HV either. Even the the servo's neutral (1520µs or 760µs) is no issue.
Last thing, the G720HV has some pretty nice features. For example, it's got multi-mode, which means you can opt for either AVCS (heading-hold mode) or rate-mode. You also can use it with NiCd, NiMH, LiFe, or LiPo battery chemistry (ranging between 4.8-8.4V). Plus a real nice touch is how instead of a plastic case, it's housed in a case that's CNC-machined from a solid billet of 6061-T6 aircraft aluminum.
Bottom line? Whether you fly helicopters, are partial to short coupled WWI biplanes, or lust for the heavy iron of WWII warbirds, if you want a little peace of mind, put one of these in your model. You'll be glad you did the very first time you see it track arrow-straight and automatically correcting for a crosswind - believe it.
