Hawk Pro pitch settings

[Aksport]

I'm redoing the head on my Hawk Pro, I found some misadjusted pieces from the previous owner so I'm starting completely over. I went through the manual and set all the linkages to the spec lengths they listed and now I'm looking for help on the max pitch settings. I'm running the stock OS.32. It's got pretty decent power and I've done a couple flips with it, but I wouldn't call it powerful. I'm still learning to mix the throttle and pitch curve without a governor. My worry is that I'll over pitch what the engine can handle. I know that the hardcore 3D machines run up to +-13 degrees but what's a good mild aerobatic setting? I want to be able to put on some carbon blades eventually, kick up the head speed to around 2000 (I've been told that's okay with this machine) and do some mild 3D and inverted. Or am I just dreaming with the small engine?

[MotorRotor]

duplicate

[MotorRotor]

The max pitch and the rotor speed are related directly to how much power you have available. Increasing head speed by 10% will increase power consumption by about 35%!!

You will find the OS32H is an relatively user friendly power plant but it is not a real power house like a Toki 40 that some where sold with, or the current OS37.

So with a rotor speed of 1800 or so, you may only be able to comfortably pull 8 to 9 degrees of pitch without loosing head speed. So as you go though maneuvers, a combination of 3 degrees of cyclic and 6 of collective (or vise-verse) is possible at wide open throttle, or any other combination that totals 9 degrees. Of course right rudder inputs would add to the power demand. That is why you hear people talking about pitch management in 3D flight.

If you want to turn a rotor speed of 2000, I would strongly recommend that you get the CN2221 6mm feathering spindle upgrade with the thrust bearings. A rotor speed of 2000 will be very hard on the radial bearings on the stock 5mm shaft and you will cave to drop some of your pitch setting with the OS32.

As for cyclic to throttle mixing, due to the relatively lower power available from the OS32 (I assume you have a good muffler and not the stock restrictive one), you should use a 100% mix and adjust downward from there (but I don't think you will need to) if you happen to have a very powerful OS32. You may at times hear a slight bog or over speeding, but it will be minor.

[Aksport]

Cool. Does that work with the stock blade grips or do I have to upgrade? Does the metal rotor head come with the larger shaft? CN2515A I see that it calls for the larger 4mm flybar. Is it worth it with this heli to get the metal rotor head? The only upgrade I've really been considering is the constant drive tail upgrade CN2263A I'm sort of torn between upgrading this one, or just flying it as is and spending the money on an N640.

[MotorRotor]

Originally Posted by Aksport

Cool. Does that work with the stock blade grips or do I have to upgrade? Does the metal rotor head come with the larger shaft? CN2515A I see that it calls for the larger 4mm flybar. Is it worth it with this heli to get the metal rotor head? The only upgrade I've really been considering is the constant drive tail upgrade CN2263A I'm sort of torn between upgrading this one, or just flying it as is and spending the money on an N640.

Yes, the CN2221 6mm shaft upgrade uses your stock blade grips.

I would not consider the CN2515A for this heli. It will work well but you will not be able to appreciate all it can do because you will be limited in power. Though it will work with your Hawk Pro, it was actually designed as an upgrade for their larger 50/55 sized Raven and NX50 helis.

If I were you, I would only consider the relatively inexpensive CN2221 upgrade and fly as is and then get the N640 with a hot OS55 or YS55 motor if you want to stick with nitro helis, or go for the E640 when you are ready for a real hot electric.

[Aksport]

Thanks. I am thinking the same. I would have to get the ccpm upgrade, the tail upgrade, the motor upgrade etc etc etc to make this thing really hot, so I think I'll just save my money for a 640. I'm really liking the nitro helis for the easy refuel and go, I don't know if I really want a big electric or not.

[ngin]

Originally Posted by Aksport

Thanks. I am thinking the same. I would have to get the ccpm upgrade, the tail upgrade, the motor upgrade etc etc etc to make this thing really hot, so I think I'll just save my money for a 640. I'm really liking the nitro helis for the easy refuel and go, I don't know if I really want a big electric or not.

The nice thing about the Radikal 640's is that you can get them in electric versions or nitro powered versions, as well as Flybar head versions and FBL versions.

[Aksport]

Originally Posted by ngin

The nice thing about the Radikal 640's is that you can get them in electric versions or nitro powered versions, as well as Flybar head versions and FBL versions.

I'm pretty sure I've bought my last flybar equipped helicopter. I am leaning towards the 640N with an O.S.55 Hyper and the BeastX flybarless setup. Then again, with fuel prices a G20 looks good too lol.

[MotorRotor]

Originally Posted by Aksport

I'm pretty sure I've bought my last flybar equipped helicopter. I am leaning towards the 640N with an O.S.55 Hyper and the BeastX flybarless setup. Then again, with fuel prices a G20 looks good too lol.

That would make for an awesome combination.

[Aksport]

Originally Posted by MotorRotor

That would make for an awesome combination.

I think so. I need to do a little research and find out if you can use a governor with the beast x or if it has something built in. I don't know how those work yet but I think it would be a lot easier than trying to mix it manually. Otherwise I think that's pretty much my ultimate wishlist. Some HV servos, carbon blades all around, bright orange or bright green or something super visible. I saw an awesome green canopy in another thread that I think would be perfect.

[Dennis P]

There is no governor built into the Beast X but you can use any governor .Throttle jockey,Futaba ect ,it will be on it's own and not tied into the Beast X.The new Skookum 540 has a built in governor if you are looking for a flybarless with a governor for around the price of a Beast X.

[Aksport]

I haven't ever looked at the skookum products, I just recently stated looking into the flybarless systems. I was looking at the ThrottleMax governor, I think it's the latest offering of the Throttle Jockey Pro. I have always heard good things about the Beast X system and I've had great luck with everything from Horizon Hobby so I figured I would like the Beast X as well, plus my nearest hobby shop heli guru has nothing but great things to say about it. I think I will do some research into the skookum and others first though.

[MotorRotor]

Originally Posted by Dennis P

There is no governor built into the Beast X but you can use any governor .Throttle jockey,Futaba ect ,it will be on it's own and not tied into the Beast X.The new Skookum 540 has a built in governor if you are looking for a flybarless with a governor for around the price of a Beast X.

Dennis, do you use the governor of the Skookum on your G20?

[karl k]

Originally Posted by MotorRotor

Dennis, do you use the governor of the Skookum on your G20?

Interested in the answer as well.


---------------------------------
Please excuse me if my post looks like it was typed by a teenager. It was sent from my phone.

[Dennis P]

Hello Motor Rotor I have the Beast X on my G20 presently but may pull a new 540 some day and try it on there.

[MotorRotor]

Originally Posted by Dennis P

Hello Motor Rotor I have the Beast X on my G20 presently but may pull a new 540 some day and try it on there.

Ah, As you had the SK on your E640, I just assumed you also did on your G20.