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HelicopterCentury Radikal G20-30 N640 Hawk Predator › Hawk Pro - Comparison of Facts
11-30-2005 11:52 PM  12 years agoPost 1
Jack Skip

rrApprentice

Abaco, Bahamas

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I am interested in comparing some hard facts and invite all to add their experiences with the Hawk Pro, and power set ups.

Assume true straight line mechanical setups, or close. Add info you think may help.

eg.
Hawk Pro
Antirotaion bracket
Futaba 401 and 9254 digi
Fun Key fiberglass blades 550.
OS37 with Toki muffler
PCM rx
1800 Mah battery

Hover at 50% throttle
Hover at 5.5 degrees pitch
3 to 4 flights per battery charge
15 minutes per flight, hover
15% Morgan fuel
Head speed - unknown

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12-01-2005 01:51 AM  12 years agoPost 2
BC Don

rrElite Veteran

Calgary, AB Canada

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Might be a bit high on the head speed but with fiberglass blades should be OK. I'd figure that you'd be running close to 2,000 RPM if you are hovering at 5.5 and 50% throttle.

Got Money? Send it to me, I'm a Heli Addict.

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12-01-2005 04:20 AM  12 years agoPost 3
Al Austria

rrElite Veteran

Gainesville, FL

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I'd figure that you'd be running close to 2,000 RPM if you are hovering at 5.5 and 50% throttle.
How the heck did you figure that?

I'd say that he would be around 1650 which is ideal but would hardly consider that being close to 2000.

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12-01-2005 07:08 AM  12 years agoPost 4
Gearhead

rrMaster

Vt

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this is really hard to respond to, how advanced are you on the sticks ?, are you looping yet ?. all pilots have a different sweet spot they like.

if your NOT looping yet I would set it at 1650 to 1700 and leave it at that, for-sure no lower than 1650,,, if you are looping in idle-up 1 I would think you would want it at least 1700 even 1750, this would give you some power to pull up as your start to round the bottom of the loop. I remember "once" (on my Hawk) going straight down into the ground coming out of a loop, I had my cyclic stick pulled all the way back and she would not pull-up because my head speed was to low, "I learned real quick on that crash !!" I raised my head speed after that crash LOL

1 thing for sure the Pro is a 30 size heli and all 30 size helis love a good head speed (even at just hovering) because of their shorter 550 blades, I still remember my Hawk 30 with 550 blades~ it did NOT respond as quick as my Falcon does with 600 blades... on my Falcon 50 for hovering and just flying around I try for no more than 1700 no less than 1650 (1675 is perfect for me) it's my sweet spot, it's just what I like, it's smooth yet responsive at these head speed and it's not screaming, lower than 1650 I found it not to respond the way I like and my motor will not pull the way I like it to,,, so if you find you have been flying your 30 around at 1700 even 1750 and your happy then I say be happy with that,,, one thing for-sure~ the better you get at the sticks most-likely the quicker you will want your heli to respond "to a point anyway",,, my Falcon has been converted to a Raven so it will respond even quicker now,,, (and of-course in idle-up 1 & 2 I set for a higher head speed)

the real bottom-line is it's your heli so you should set it up to fly the way you like the sticks to feel, although I would not spin the Pro much higher than 1800/1825 (1850 tops) because it has no thrust bearings in it's blade grips,,,

don't be afraid of trying different head speeds, this teaches you to set your curves better and smoother, and teaches you to know just what to do if you find your heli is not fly the way you like...

one other thing~ if your only looping (or not) don't let some Hot Rodding stick-banger talk you into a head speed of 1850, you just don't need it yet !!

good luck, ask what you need !!
Jim

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12-01-2005 02:58 PM  12 years agoPost 5
Jack Skip

rrApprentice

Abaco, Bahamas

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Thank you. Lots of info.

I don't have a tach, so cannot even guess head speed. Maybe I should look at the ProLock governor, which would also give me head speed info.

For safety, I think I will also go for the 6mm spindle and thrust bearing upgrade.

Any other upgrades worth while? 4mm flybar? Hard rubber dampers? Metal swashplate? Metal bell mixer arms?

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12-01-2005 03:23 PM  12 years agoPost 6
SteveH

rrProfessor

Texas

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Any other upgrades worth while?
Jack Skip,

While they are all good, the one that I recommend after the thrust bearing upgrade is the tripple ball bearing tail rotor upgrade. Comes with new larger blade grips and four radial bearings, two thrust bearings, and a new tail rotor hub. It's the same setup used on the Falcon, Raven, and Predator.

The government cannot give you anything without first taking it from someone else.

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12-01-2005 03:23 PM  12 years agoPost 7
NewHeli

rrKey Veteran

Pittsburgh, Pennsylvania, USA

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Jack, you're still hovering at half stick

NewHeli

Nathaniel Rice
Team YS Engines

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12-01-2005 03:58 PM  12 years agoPost 8
Jack Skip

rrApprentice

Abaco, Bahamas

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NewHeli
No. I was. Now hovering at 3/4 stick, which is 50% of throttle throw.

Throttle set up as advised using throttle curve 0, 25, 50, 75, 100 to set up mechanical links. Now I know where throttle is.

SteveH
I may need to add up costs on the growing list of upgrades. Maybe better to go bigger bird one time. There is an older Eagle 60 for sale near here. I may look at that.

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12-01-2005 07:45 PM  12 years agoPost 9
BC Don

rrElite Veteran

Calgary, AB Canada

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I'd figure that you'd be running close to 2,000 RPM if you are hovering at 5.5 and 50% throttle.
--------------------------------------------------------------------------------
How the heck did you figure that?

Based upon what I saw when I had my Toki 40 installed. 50% throttle in a hover was giving me a rotor RPM of close to 2,000 RPM and that's at about 4,000 feet. And, that'd be at a pitch setting of 5.5 to 6.

No scientific calculation of "50% of engine RPM times gearing etc.), just what I experienced.

Of course he may not be at that speed. If he had said he was at +6 that might be a bit different but at 5.5 I'm thinking the blades are spinning pretty good.

For Hovering at +6 I ended up with less than 50% throttle (40% to 45%) and that was spinning 1700+.

Got Money? Send it to me, I'm a Heli Addict.

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12-02-2005 12:29 AM  12 years agoPost 10
RevGadget

rrVeteran

Decatur, Alabama

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Look to get 8.5 - 11 minutes with an OS37 which depends on your head speed. I run 15% PowerMaster.

I get 3 flights with a 1500 mAh and thats with 3 retract servos and a 9 LED light system.

If you get 560mm or maybe even 570mm blades, it will improve lift and autos with either the 37 or 40.


3D2me= One eye on the Tx, one on the Heli and my thumbs in between.

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12-02-2005 02:19 AM  12 years agoPost 11
NewHeli

rrKey Veteran

Pittsburgh, Pennsylvania, USA

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Glad to hear it Doug! (Oops, I called you Jack in my previous post! ) Sorry for the misunderstanding.

So how's your Pro doing?

Happy flying!

Nathaniel

Nathaniel Rice
Team YS Engines

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12-02-2005 02:49 AM  12 years agoPost 12
Jack Skip

rrApprentice

Abaco, Bahamas

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Lovin the Heli

Words cannot describe the fun I am having with this heli. Been thru over a gallon now. Flying every chance I get. Feeling like the battery needs to last longer cause I want more flights in one day (will get another pack).

Have been doing hover, slow figure 8s, some FFF, some full power climb outs. I have so far kept the bird upright. Need to turn her over, soon.

I like to hover in one spot, then do something, returning to the same spot. Hey, I have fun just hovering out a tank.

Supposed to get together with the other heli pilot here, up North (MikeRobe). Maybe Saturday. He should be able to tell me if I need to raise the head speed a bit.

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12-02-2005 11:25 PM  12 years agoPost 13
BC Don

rrElite Veteran

Calgary, AB Canada

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So Jack, do you have a place to stay for us Northerners during the winter if we come down for a few weeks?

It's -17C today for a high with light snow througout the day.

Got Money? Send it to me, I'm a Heli Addict.

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12-02-2005 11:35 PM  12 years agoPost 14
Jack Skip

rrApprentice

Abaco, Bahamas

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Yea. Its cold here too. We are going out in a few minutes, with our jackets and long pants. Low tonight will be down in the 60s. No snow though.

Ooops. I promised not to be sarcastic.

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12-03-2005 07:04 AM  12 years agoPost 15
Gearhead

rrMaster

Vt

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""Hey, I have fun just hovering out a tank."" some times I like to hover just 2 inches off the grass, and hold it as steady as I can..

Jim

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