RunRyder RC Helicopter Topic - Help with Hawk power choices and Mods.

RR Rated M For Mature

HOME rrTV-PHOTO GALLERIES MY GALLERY HELP-FAQ

myHOME PM pmRR MEMBERS 703 ONLINE 20 EVENTS SEARCH REGISTER START HERE

2 pages [ << < ( 1 ) 2 NEXT >> ]

506 views

POST REPLY

JR-Spektrum	.	E-flite	.	Fast Lad Performance
	.		.

Century Hawk - 50NX - Raven - Predator > Help with Hawk power choices and Mods.

CompyMike
Senior Heliman
Location: sacramento, ca

My Posts This: Topic Forum

I'm trying to get my Century Hawk with a OS32 to fly more like my Century Swift. I'm thinking it will never happen. I had a OS 46 in it and it would flip and roll pretty fast. I had the headspeed governed to 1850 with wood blades. Seemed like I was always messing with that motor though so I put my other hawk frame with the stock gearing back together with a OS 32.

I have it governed to 1850 with a throttle jockey rev limiter and I do my flying in Mode 2 with 100% flat throttle curve. 30% cool power fuel. I can hold my finger on the back plate for about 5 seconds. My collective is +-9 degrees. My cyclic is like 6 degrees. Wood blades and stock paddles with no weights. Stationary flips can be very scary. It back flips very slow. Rolls very slow too. It's good for practicing my backwards flight though. I have some heavy MAH 555 blades I could put on it or use the Mavirck blades off of my Swift.

The swift is using old mavrikk CF blades which seem very light seem to roll and flip quicker on the Swift than when I used the MAH 555 blades on the Swift. It also has a Scorpion motor and 10s A123 doing a 1750 headspeed.

Should I try and get more cyclic travel on the Hawk? Maybe 7 degrees? Maybe bump the headspeed up and run CF blades? I have a Thuder Tiger 39 I could put in it. I had it in the hawk for a while but it seemed like the mixture was always changing and you could tell it would go lean and the headspeed would ramp up. But maybe with my rev limiter it would work better.

Am I just beating a dead horse here? Should I just hunt down a OS 50 Hyper and use the hawk frame with the taller gears?

Maybe try to lighten the hawk with the OS 32 and run CF blades at a higher headspeed? I don't think I can go too high cause I will be out of the power band of the OS 32.

Since the Hawk is alot taller than the Swift maybe it will never roll or flip like my Swift does.

I can run the OS 32 for weeks without having to do any messing with the carb which is why I went back to the OS32. I get more flight time with the reliable OS 32. IF the TT39 was like that motor I would be more likely to put that motor back in. Or if a Hyper 50 was reliable as a good old OS32 I would start looking for one. But then I hear about all the issues about bearings and Hyper 50's. Maybe I should put a OS37 in it?

I don't really do 3D. But I like to do some pretty aggressive sport flying. Running back flips, Rolls and flips. I can't just fly scale like. Everytime I go down the field I need to do a flip or roll. The OS32 will do it but I better have some distance from the ground and good forward speed.

06-30-2009 12:41 AM

PROFILE PM EMAIL POSTS BUDDY IGNORE GALLERY

FBoss
Key Veteran
Location: Aurora Indiana USA

My Posts This: Topic Forum

I run my hawk on an OS37 w/stock gearing, RT550s, every thing is RAVEN except blades and motor mount.It runs great at just under 2K head speed. My raven is a hyper 50 w/radix blades, metal head and tail decked out nicely. The Raven has 9252 as opposed to the 3151s on my Hawk. The raven is much quicker in all respects and I think the servos are the biggest difference besides the motor. The Hawk is like a brick compared to the Raven.

Neither can touch the POP of my LOGO10.

I dont think you will get your Hawk where you want it. (as stated) The power to weight and the instant full torque available to the electrics just cant be duplicated in Nitro. Flame suit on

I do say get some rotor techs on it and an OS37. Forget the metal head but do the thrusted main grips. Get the metal tail upgrade including metal tail slider and bearings for the tail pitch bell crank. Additionally I do say keep a 30 in your fleet. I could easily get a hyper for my Hawk but I decided not too. I does fly great within its envelope, has good power, dosent strip servo gears, gets great gas mileage and really makes me work at doing maneuvers. Without all that instant power you forced to really manage the collective, thats a good thing IMO.

At the end of the day I dont think you can make a Hawk fly like a swift but the Hawk is a great heli to keep around.

The good ole times are now ,Hawk, Raven, Raven NX, Logo 10

06-30-2009 01:09 AM

PROFILE PM EMAIL POSTS BUDDY IGNORE GALLERY

CompyMike
Senior Heliman
Location: sacramento, ca

My Posts This: Topic Forum

Thanks Boss

Yah I like the challenge of the 30 size Nitro. The frame with the taller gears has a full metal head. So I could just get a Hyper for it. But I hear good things about the OS37. Oh I don't know. I guess I'll ponder it for a while.

06-30-2009 09:48 AM

PROFILE PM EMAIL POSTS BUDDY IGNORE GALLERY

Mutt
Key Veteran
Location: M ca usa

My Posts This: Topic Forum

I run the os .37 and the fiberglass blade from century 1800 head speed and in the hands of a person who does 3d (I dont not even interested in learning it I fly sale and sport) it will do a lot of stuff just fine. You will like the power and dependablity of the 37.and if you want insane go with the 50 size mounth and the os 50 and the gear needed tons of power I do that for the scale ships that are heavy.

06-30-2009 01:53 PM

PROFILE PM EMAIL POSTS BUDDY IGNORE

FBoss
Key Veteran
Location: Aurora Indiana USA

My Posts This: Topic Forum

I sure do like my OS37 alot, heck I only run it with 15%. Not a power monster but pretty dang good and very reliable.

The good ole times are now ,Hawk, Raven, Raven NX, Logo 10

06-30-2009 02:57 PM

PROFILE PM EMAIL POSTS BUDDY IGNORE GALLERY

CompyMike
Senior Heliman
Location: sacramento, ca

My Posts This: Topic Forum

So with the OS37 would you be able to
1. Take off from the tarmak at full collective (say 10 degrees pitch)
2. go into a back flip or loop and then do a imediate roll.

And not loose too much elevation or headspeed?

06-30-2009 05:33 PM

PROFILE PM EMAIL POSTS BUDDY IGNORE GALLERY

Mutt
Key Veteran
Location: M ca usa

My Posts This: Topic Forum

yes

06-30-2009 05:40 PM

PROFILE PM EMAIL POSTS BUDDY IGNORE

Blade_Master1
Elite Veteran
Location: Canada

My Posts This: Topic Forum

you could put a TT53 in it

It weighs about a 100 grams less then the Hyper

I flip and roll with a OS37 can almost tic toc it too

F-27
MSR
Terminator Raven
NX Pro
Raven50
K50
HawkPro(~rip)
Swift 550

07-01-2009 12:31 AM

PROFILE PM EMAIL POSTS BUDDY IGNORE HOMEPAGE GALLERY

CompyMike
Senior Heliman
Location: sacramento, ca

My Posts This: Topic Forum

TT53! My counter shaft would explode! Heh. Os37 must be a good motor cause you rarely see them for sale. New hypers are coming out soon so maybe the hyper 50's price will drop.

07-01-2009 12:45 AM

PROFILE PM EMAIL POSTS BUDDY IGNORE GALLERY

Blade_Master1
Elite Veteran
Location: Canada

My Posts This: Topic Forum

Quote
TT53! My counter shaft would explode!

Mine hasn't yet

F-27
MSR
Terminator Raven
NX Pro
Raven50
K50
HawkPro(~rip)
Swift 550

07-01-2009 01:18 AM

PROFILE PM EMAIL POSTS BUDDY IGNORE HOMEPAGE GALLERY

oldfart
Elite Veteran
Location: Vancouver, Canada

My Posts This: Topic Forum

Go with the OS-37 and the CN3039 muffler.

Then adjust the head for a head speed of 1850 to 1900. Use lighter bklades (e.g the CNF5533 or the Rotor Tech CN26566.

Change to some large area, light 3D paddles and tune as per this article for the response you want.

http://www.leisuretech.ca/index.php.../faster_cyclic/

P.S. a 9/0/9 curve is a bit much for the OS-32 at 1850. Youy would have to be very good on collective/cyclic management to keep the rotor speed from bleeding off through hard maneuvers.

What muffler are you using?

NOte that the gearing of a heli is directlyrelated to matching the motor/muffler combos power curve to the desired rotor speed. I think with an OS46 the shorter blades would not load it properly and make the two needle settings difficult to get to work well at all powewr settings.

You would even have more needle setting problems with a larger OS50Hyper, YS51 or TT53.

07-01-2009 05:00 AM

PROFILE PM EMAIL POSTS BUDDY IGNORE

CompyMike
Senior Heliman
Location: sacramento, ca

My Posts This: Topic Forum

Thanks buddy
happy Canada day. Good article. Going to start modiflying the head per article info. I will look around for some better paddles and better main blades. I probably won't try and go back to the os46 or get a hyper for it. But I bet if I use that metal head that is on the hawk with the taller gears I could do better. It has adjustable blade grip mixers. Thicker flybar and pantera paddles.

Maybe I will put the heavier mah 555 blades back on the swift and put the mavrick cf blades on the hawk.

PS I think I am using a OS muffler

07-01-2009 05:55 PM

PROFILE PM EMAIL POSTS BUDDY IGNORE GALLERY

rcflyer2006
Heliman
Location: Canada

My Posts This: Topic Forum

I saw no mention of the Toki 40. I see that the Hawk Pro can be bought with the Toki engine and muffler. Oldfart, what's your opinion of the Toki with the muffler package instead of the OS 37.

07-01-2009 06:36 PM

PROFILE PM EMAIL POSTS BUDDY IGNORE

CompyMike
Senior Heliman
Location: sacramento, ca

My Posts This: Topic Forum

I thought Mr Toki died. So maybe getting parts in the future might be tough? Guy at my field has one in his Hawk. Seems very powerful.

07-01-2009 07:53 PM

PROFILE PM EMAIL POSTS BUDDY IGNORE GALLERY

oldfart
Elite Veteran
Location: Vancouver, Canada

My Posts This: Topic Forum

My personal favorite engine for the Hawk is definitely the Toki 40. That is what I run in mine...and it ROX.

I used to recommend it all the time, until I realized people were not reading the instructions and trying to set it up like an OS by starting with the main needle set at 1 1/2 to 2 turns open. The result was almost always a damaged engine. Why? Because the Toki instructions were very clear about starting at 3 1/2
to 4 on the Toki. The TOKI will run at a 2 turn setting but that is obviously far too lean a setting for it. Consequently it will come apart rather quickly trying to run it at these OS type of settings.

But, if one tunes it as per the instructions, it runs like a thoroughbred, with power to spare!

Then the company temporarily closed (maybe as mentioned above, due to Mr. Toki's passing?) so parts could have become an issue. But now I understand MECOA in California has bought the company and now have parts.

Why I usually recommend the OS-37, is because it is easy to set for those who are more familiar with the more standard heli engine carb settings, it has substantially more power then the former 32SX (even if it does not have near the high rpm power that the TOKI does) and because it is available almost everywhere.

07-02-2009 06:39 AM

PROFILE PM EMAIL POSTS BUDDY IGNORE

CompyMike
Senior Heliman
Location: sacramento, ca

My Posts This: Topic Forum

You don't see many Toki's for sale either. Probably cause they are pretty good.

I pulled the OS32 out tonight and the fan was about to fall off! Yikes! Yes I did loctie. Odd....

Got the idea to try the TT39 with the carb off of my OS46. Started her up on the bench with the OS46 carb needles tuned for the OS46. That thing started right up and sounded great. It was late at night so no test flight. Idled for about a minute without the glo plug driver. Blipped the throttle a couple of times. Back plate wasn't getting immediately hot. Going to try this setup out. Had the TT39 in the hawk a couple of months ago. Good power but was going lean and then rich randomly. Very odd. Maybe it will work well with the OS carb and now that I have a rev limiter. It might be the ticket.

07-02-2009 08:22 AM

PROFILE PM EMAIL POSTS BUDDY IGNORE GALLERY

Ray Fernandez
Elite Veteran
Location: Guam (U.S.A.)

My Posts This: Topic Forum

As far as the Toki engines go, I am a firm believer in them. When I had my Hawk PRO, the Toki 40 I was running on it was a dream motor. Gave me the power I needed and was (IMHO) better than the OS or TT motor I had previously.

If it is still up for sale and I had a Hawk in the fleet, I would not hesitate getting another Toki.

Ray Fernandez - GUAM

07-02-2009 12:10 PM

PROFILE PM EMAIL POSTS BUDDY IGNORE GALLERY

imnxtc
Veteran
Location: Dawson

My Posts This: Topic Forum

Quote
As far as the Toki engines go, I am a firm believer in them. When I had my Hawk PRO, the Toki 40 I was running on it was a dream motor. Gave me the power I needed and was (IMHO) better than the OS or TT motor I had previously. If it is still up for sale and I had a Hawk in the fleet, I would not hesitate getting another Toki

Ditto!

I am sure most heli flyers where not willing to give it a try, because of all the horror stories over the years about other makes of heli engines in this size.

They probably thought the Toki was just another irrelevant off-brand that was made in Taiwan or China like the others. They probably did not realize they were designed and manufactured in Japan by a very respected company who also specialized in small ducted fan engines.

07-02-2009 05:07 PM

PROFILE PM EMAIL POSTS BUDDY IGNORE

oldfart
Elite Veteran
Location: Vancouver, Canada

My Posts This: Topic Forum

Quote
Thanks buddy happy Canada day. Good article. Going to start modiflying the head per article info

You are very welcome CompyMike, glad to be of assistance.

Thank you for the Canada Day wish (Canada's July 4th FYI my American friends

). I had a great and relaxing Canada Day, ending in a pub with some good friends - life is good.

07-02-2009 05:12 PM

PROFILE PM EMAIL POSTS BUDDY IGNORE

tivopro
Senior Heliman
Location: Stockton, CA

My Posts This: Topic Forum

I had to get a new rear bearing and piston ring for my Toki 40. Thought the motor was toast cuz of lack of parts, but found Century to still have the bearing and found the TT39 uses the same bore - 21.6mm as the Toki so got a piston ring from Tiger parts. Great motor and just hate to part ways, hope others can find parts as well.

We should start a thread for the die-hard Toki owners of where to find needed parts. It was tough to locate everything!

Tivopro - Toki 40 owner

07-03-2009 12:38 AM

PROFILE PM EMAIL POSTS BUDDY IGNORE GALLERY

2 pages [ << < ( 1 ) 2 NEXT >> ]

506 views

POST REPLY

Ace Hobby	.	Esprit Model	.	Thunder Power RC
	.		.

Century Hawk - 50NX - Raven - Predator > Help with Hawk power choices and Mods.

Print TOPIC

Advertisers

Subscribe to This Topic