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HomeScaleAircraftScale HeliScale Helicopter Main Discussion › Roban 600 Sea/Black Hawk
09-18-2018 09:04 PM  34 days agoPost 1
hrc37

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Derry, PA

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Looking for some advice from anybody that has built the Roban 600 size Black Hawk.

I had a 500 size but thought it was too small and wanted something bigger so I purchased to 600 size a few years ago. Even though it's considered a 600 I think it's closer to a 700 size fuse. Well It's been sitting on the shelf all this time and the other night I decided to start it for the 2019 Nats. The first thing I notice was just how heavy the bare fuse is. So my concern is if the 550/600 mechanics is really strong enough for this fuse. I was also going to use the Align 550 4 bladed head but I'm worried that it may be too small. I think 660mm blades would easily work on this fuse and I think 600mm blades will look too short and not sure what the performance would be. I do have an extra Align 700 mechanics and there's plenty of room in the fuse for this. It would take a little modification to make it work for the angle of the boom and the main shaft but no big deal. And with the 700 mechanics, I can run a 12 cell pack and again, 660mm main blades.

So just curious to know if anybody else has tried 700 size mechanics and for the ones that have used the stock frame/mechanics, if there has been any issues. Again, it just seems so heavy and that is without any interior or scale details at this point.

Thanks for any info! Mark

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09-18-2018 10:45 PM  33 days agoPost 2
Grimracer

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Eau Claire WI

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Mark,

My 600 size EC-145 is 16 lbs ready to fly.. yes.. its a pig.. but it flys like a champ..

Rex 600 mechs

Grim

Michael J Zaborowski

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09-18-2018 11:17 PM  33 days agoPost 3
Phoenix NOTAR

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Tallahassee, Florida USA

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Yikes!
If 16 lbs is a pig, I would hate to think what you would call what I fly (at 49 lbs!)

Sandy

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09-19-2018 01:04 AM  33 days agoPost 4
ssmith512

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Indianapolis, IN USA

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Pffft....ya'll have no idea what pig is......AMATEURS!!

Steve

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09-19-2018 01:36 AM  33 days agoPost 5
co_rotorhead

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Centennial, CO, USA

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hrc37
So just curious to know if anybody else has tried 700 size mechanics and for the ones that have used the stock frame/mechanics, if there has been any issues.
I currently have 2 Roban 600 Black Hawks, both using the frames that came with the kits. Both of 'em weigh about 16 pounds all up. I run them on 2 x 5-cell 5000mah packs in series (10S) with a headspeed of about 1350 rpm on 4 x 600mm blades.

No issues, except the CG. These models are tail heavy and could probably use another 1/2 pound of weight in the nose to balance them out.

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09-19-2018 01:09 PM  33 days agoPost 6
cobieg

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Florida

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Now here is a little fat pig

Ron

I didn't crash. I just ran out of airspeed, altitude, and ideas all at the same time!

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09-19-2018 01:44 PM  33 days agoPost 7
hrc37

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Derry, PA

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Grimracer
Mark,

My 600 size EC-145 is 16 lbs ready to fly.. yes.. its a pig.. but it flys like a champ..

Rex 600 mechs

Grim
That ain't no pig....that's a HOG!

So Mike, what is the motor/battery/blade combination are you using?

I weighted the bare fuse last night and it comes in around 4.5lbs. Here are some pic's showing the 700 mechanics compared to the frame set that was included in the kit. Mark

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09-19-2018 01:48 PM  33 days agoPost 8
hrc37

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Derry, PA

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co_rotorhead
I currently have 2 Roban 600 Black Hawks, both using the frames that came with the kits. Both of 'em weigh about 16 pounds all up. I run them on 2 x 5-cell 5000mah packs in series (10S) with a headspeed of about 1350 rpm on 4 x 600mm blades.
rotorhead, what motor are you running?

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09-19-2018 02:15 PM  33 days agoPost 9
doorman

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Sherwood, Arkansas

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Looks like the 700 might be showing in the cabin area, messing up your interior??
4 blade head is going to give you a lot of lift.. maybe use a 4 blade head for a 700 (if it isn't too big??) but a 600 size head should hold 660's without a problem, since you will be running a slower head speed...
I think I would have to stay with the stock mechanics, and give it a go...Just make certain to tie the top of the mechanics to the top of the fuselage...keep those shakes out...

Stan

AMA 2918-Team Spin Blades,,Castle Creations, Unique Aircraft

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09-19-2018 02:26 PM  33 days agoPost 10
hrc37

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Derry, PA

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Hey Stan, yea I think I will give the stock setup a try since it seems like other people haven't had any issues. I think I'm "over thinking" this.

By the way, if I did use the 700 frame I would remove the front part of the frame to keep it from interfering with the cockpit. I did this with my Vario/Trexx Lama. Mark

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09-19-2018 05:01 PM  33 days agoPost 11
Grimracer

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Eau Claire WI

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hrc37
Grimracer
Mark,

My 600 size EC-145 is 16 lbs ready to fly.. yes.. its a pig.. but it flys like a champ..

Rex 600 mechs

Grim
That ain't no pig....that's a HOG!

So Mike, what is the motor/battery/blade combination are you using?

I weighted the bare fuse last night and it comes in around 4.5lbs. Here are some pic's showing the 700 mechanics compared to the frame set that was included in the kit. Mark

Mark,

the motor is a Scorp 40-35 500... (I think, i can double check that). I use Align 600 FLB blades and its powered by 8S....2P (thats 4 4200s in 2S-2P).. 8400mah.. man.. not sure I have that 100 correct but I think so.. (getting old aint for sissys!)

Grim

Michael J Zaborowski

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09-19-2018 06:17 PM  33 days agoPost 12
co_rotorhead

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Centennial, CO, USA

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hrc37
rotorhead, what motor are you running?
Motor: Scorpion HKIII-4025-550Kv
Main gear: KDE 115T Mod 1.0
Pinion gear: 10T Mod 1.0
Gear ratio: 11.5:1

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09-19-2018 06:35 PM  33 days agoPost 13
hrc37

rrApprentice

Derry, PA

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Motor/Blades/Batteries
Thanks guys for the motor, blades, and battery combinations. It will save me a lot of time without "trial and error" and not having to reinvent the wheel! I may even do a build thread on it if I can find the time. Mark

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