Gaui NX7 and YS96 SRX Tareq engine.


Today, (July 4th 2016) I got to the field at about 07:30 and immediately started flying my NX7. By 09:30, I had already put six flights on it with the YS96 SRX Tareq engine and YS Power Pipe.

I am still running the engine very rich, and even though it is not completely tuned yet, it is still making a ton of power. I spent from 07:30 til about 15:00,  flying it back to back. Pausing only long enough between flights to let the engine cool down. I lost count of the number of flights I got in today, but I did burn almost two gallons of 30% Rotor Rage....the second gallon has maybe one flight worth of fuel in it.

I don`t have a flight timer set in my transmitter, but I`m guessing the flights are somewhere around 5.5-6 minutes on a blubbery rich engine. I hope the flight times will increase once the engine is tuned for power, but if not, I won`t complain. I do plan to run it a tad on the rich side anyway, since YS engines don`t mind running rich.

I have heard some say that the YS96 is a hard engine to tune, but I really have to respectfully disagree. I`m finding that it is quite easy to get and keep a tune on it. It also starts up very quickly and easily as well, using 30% nitro and an Enya #3 glow plug.

I really like this engine and pipe combination, and I think I will like it even more when I get it tuned. Once I get the tune dialed in, I will post my needle settings in a new blog post. Gaui NX7+YS96SRX Tareq engine+ YS Power Pipe= a winning combination.

NX7 Update


I finally got the YS Power Pipe to complete the engine change in my Gaui NX7 yesterday. I got around to installing them and the helicopter up today, and I`m really happy with how the pipe looks on the helicopter.

I have to say that the finish on the pipe is a lot nicer than the finish on the Hotri pipes I have been using, and I hope it works as good as it looks. One of the nicest features of the YS Power Pipe, is the fact that it has a solid mount instead of a header. Also, the mounting screws go through the pipe mount and screw into the engine`s exhaust port. Which makes mounting the pipe a whole lot easier.

I did not get a chance to run the engine today, due to rain. But I will try and get to the field after work tomorrow to set/fine the throttle end points, and possibly make a few flights with it. Weather permitting, of course.

I will post more about the pipe and motor as I get it dialed in over the course of the next couple of weeks.

Gaui NX7 receives a new heart


After seeing the new YS96 SRX Tareq engine in action at the Orlando Helicopter Blowout in December 2015, I had to have one. I originally ordered one from RC Japan, along with a YS 96 Power Pipe. But they have been delayed for a few weeks, due to a slight manufacturing issue. I was checking out the for sale listings on a major helicopter forum a few days ago, and found one with a handful of flights for a great price. I bought it, and I just received it yesterday ( Monday June 13, 2016). I am now waiting for a second YS96 Power Pipe to get here from HeliDirect. As soon as that gets here, I can get the engine installed and proceed with the break in process.

The YS96 is an amazing piece of engineering, and displays the quality that YS is famous for. One thing that I found interesting, is the fuel regulator is mounted on the engine housing below the carburetor instead of on it like the 60SR.

Another thing that I thought was strange, but at the same time kind of neat, is the way the pipe mounts to the engine. Instead of the pipe mounting holes going clean through the engine housing, they are threaded. Which means the screws which hold the pipe on, will go in through the flange on the pipe and screw into the engine housing.

I do kind of wish that the back plate was not steel lined though, because I like to use back plate sensors for my governors. I guess I will be using a magnetic sensor on the NX7 now, which is ok.

I should get the Power Pipe by Friday, and maybe....just maybe I can get them installed and start breaking the engine in this weekend. I can hardly wait to get it going and broken in, so I can feel the power of this awesome new engine from YS.

*One other point that should be addressed, is an error in the manual. The manual says for break in, to set the Hover needle to  1.75~2.0 turns open and the high needle at 1.50~2.0 open. These settings will be way too lean for break in, and it was suggested to me, to set both needles to 2.5 turns out for the break in flights.*

More changes


In May of 2015, I announced that I was switching from my Spektrum DX8 transmitter to a Futaba 14SG. we are in May of 2016, and I am making another transmitter switch. I had been toying with the Idea for several months, and I just could not fight the temptation any longer. 

Last weekend, I purchased a Jeti DS16 Carbon Series transmitter. The main reason for the switch is the amazing telemetry options that Jeti transmitters bring to the table. The ability to track and count mAh used from the battery instead of having to use a flight timer is just awesome to me. Not to mention the logging capabilities, and the endless programming and settings possibilities including voice announcements. So there is no need to look down at the screen.

Which is another really cool feature. Instead of putting the screen on the bottom of the transmitter, Jeti put their screen on the top of the transmitter...and it is angled so you can see it. BIG plus there, if you decide not to use the voice prompts.

I should have all of my helicopters on it by next weekend.... I hope. The receivers I ordered have not arrived yet, so I can`t set anything up at the moment. I will post more about it as I fly it and get to know it more. :)

Gaui NX7 Build


After much thought and consideration, I pulled the trigger on a Gaui NX7. I have been wanting to get into a large Nitro for a while, and I just couldn`t resist the call any longer.

I picked up my kit from Empire Hobby, who got it packaged up and shipped in record time. I got the kit on a Monday, and started the build on the following Wednesday.  In typical Gaui form, the fit and finish of the parts are outstanding. There are a few things on the NX7 that are really cool, and I`ll get into those a little later. Even the box that the kit is packed in is nice.

The NX7 is a pretty fast build for a helicopter of this size, but I took my time and spread the build out over a few days to make sure I had everything just right. Out of the box, the frame sides felt like they are were pre-sanded, because there were no sharp edges on them at all. Which I really liked, because I hate sanding carbon fiber.  The first part of the build was much like the X7, in that the bearing blacks, tail boom clamps and torque tube support bearings, and some of the frame spacers  are installed.

Moving on... 

The first thing that I really like about the NX7, is the way the fuel tank is mounted in the frames. Unlike typical nitro tank mounting which use rubber edge molding to wedge the tank into place, the NX7 uses carbon fiber cross braces. These cross braces have three 5mm, equally spaced grommets which fit into indents on the sides of the tank. When installed, they suspend the tank in the mounting area...well away from contact with the frames.

But Gaqui did not stop there...

Not only is the tank suspended away from the frames, it is also perfectly centered under the main shaft of the helicopter. What that means is the CG of the helicopter remains unchanged throughout the entire flight. 

Next up, is the frame reinforcement plate. It is beautifully finished in red anodizing, and serves as a reinforcement for the frames, and as a guard for the clutch bell. A very well thought out design in my opinion.

The engine mount....

I really do like the way the engine mount is designed on this helicopter. The engine is mounted into a cage like mount and then the whole assembly is slipped into place and bolted in. This design allows the engine, with the pipe still attached, to be removed by removing just a few screws.

The rest of the build was pretty much like the X7, so I decided to skip over that rather than repeat what was written in the X7 build thread.
One more thing that I feel is worth a mention is the flying weight of the NX7. Mine weighs in at 11 pounds with the receiver pack and a full tank of fuel. Which I think is pretty light for a 700 size helicopter as massive as the NX7.  The fuel tank, BTW holds 660cc (22oz) of fuel.

Here is a list  my personal component choices for this build:

Cyclic Servos: BK DS7001HV

Tail Servo: BK DS7005HV

Throttle Servo: BK DS7001HV

FBL Controller: Bavarian Demon 3X

Governor: Align G600 with back plate sensor

BEC: Gryphon 45V 15A Hyper BEC with flag pin switch

Backup Power: Scorpion Backup Guard

Onboard Glow Igniter: SwitchGlo Pro

Receiver: Futaba R7008SB HV Telemetry Receiver

Receiver Pack: Turnigy Nanotech 1800mAh 4s

Main Rotor Blades: Zeal Energy 710mm

Tail Blades: Zeal 105mm CF

Engine: OS 91HZ for now. It will be replaced by a YS96 Tareq as soon as the matching pipe is released.

Pipe: Hatori 90FS-3D

Fuel: VP Powermaster 30% Helicopter Fuel.

Thank you all for taking the time to visit my website and for reading my blogs. I wish each and everyone of you safe and happy flying. Have a wonderful day . :)