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Modefo's RC Helicopters . XHELI.COM . Autography FlightPower

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HIROBO Freya - Sceadu - Shuttle > Sceadu 50 pitch range
 
 
richardf
Veteran
Location: San Diego, CA Posts: Billions and Billions

Now I'm having way to much fun with my Sceadu running the OS 50 and a KSJ muffler. I'd like to know what blades and pitch range you guys are running with these little Sceadu's. They have enough power to do a 500 foot loop easy and can do 70 into the wind. I'm maxed out at +12 and -10 pitch and I can still over speed this heli in a vertical climb out. The throttle and pitch curves are getting closer, most of the throttle to cyclic has been removed to tame the flips. Post your settings, I showed mine, now you show me yours.

Richard.
12-02-2001 Over year old.
 
 
Greg Takacs
Veteran
Location: Fort Worth, TX

Richard my complete radio setup is on my website. But so you know, I fly MS 600mm 3D blades, and I do NOT have the blade flutter others were complaining about. I have an OS50 in it and seems to be very happy, no overheating issues here either.
I have +11 -11 on my pitch and I get 1750rpm with this setup at full pitch/full throttle, no overspeeding.

Greg
12-03-2001 Over year old.
HOMEPAGE  
 
 
DrScoles
Veteran
Location: Redmond WA

Richard,

Throw a muscle pipe on that bad boy! I have the throttle curve maxing at 90% and no bogging. I just switched to the wide chord v-blades, can't wait to try it out.

The sceadu is unusually fast isn't it? With the semi-sym blades, it was unbelievably fast... It was like I was flying an airplane...back and forth high speed passes with high arcing turns to bleed off speed... I think this would be an awesome drag racer... It would be cool to get some flat bottom 620's, crank the headspeed up to 2100 and 13 degrees positive and watch out!

Mike
12-05-2001 Over year old.
 
 
richardf
Veteran
Location: San Diego, CA Posts: Billions and Billions

Hauls ***

This little bundle does scoot right along doesn't it! It's a rocket on the OS-50 and the 600 blades, and I know it will pull your 620 wide cords without a problem.

I had slipped a Sullivan 14 once tank in the Sceadu after the YS pump blew up the stock tank and the replacement hasn't arrived yet. Last weekend I was testing the cyclic to throttle mixing with the elevator pulled all the way back for a quick flip and managed to throw the tank out the back, Shame on me for not putting enough zip ties on it in the first place. I'm having a blast with the little guy now, only a couple of gallons burned so I'm still tinkering and adjusting.

Richard.
12-05-2001 Over year old.
 
 
vetrider
Elite Veteran
Location: Daleville, AL (Ft.Rucker)

HeHeHe
Hey Richard, Did the pucker factor go up when that tank was dangaling???

Nolan Manley
RREMODELS, KBDDintl, Magnum Fuel
Stratus, ODIN, Knight3D, ATOM 500, TREX 700N.
12-05-2001 Over year old.
 
 
richardf
Veteran
Location: San Diego, CA Posts: Billions and Billions

Pucker up baby!

Actually I'm so old and my vision is so poor, it was the thin foam vibration strips on the sides of the tank that I saw as they fluttered away like little mirrors. I turned it around and really didn't know the tank was just hanging until I turned the tail back in to land. The heli balance was off just a tab too! Live and learn.

Richard.
12-05-2001 Over year old.
 
 
CRAZYJAS
Heliman
Location: Houston, Texas

Sceadu 50 Missile

Richard and Greg

After breaking in my machine it was over speeding like crazy with the stock 570s- So I decided to see what the stock blades/ os50/TT upgrade 50 pipe/ and coolpower 30% could really do. I started at +11 deg. pitch and kept increasing the thottle and pitch curve until at 92% throttle, I was still overspeeding +13.5 deg pitch WOW - this heli was rocketing of the pad not to mention that the semi symetrical blades pushed it to at least +14 plus - AND flying like a missile.

I agree, it does fly unusaully fast- IMO - the reason it does is becasue of the awesome power to weight ratio the Sceadu 50 has as compared to a 60 Freya. For example

The OS 50 pumps out .12 hp per pound in a 7.5lb heli
The OS 61 WC puts out .10hp/lb in a 11-11.5lb heli

thus- the power to weight ratio for the Sceadu is .016
and the power to weight ratio for the Freya .008 meaning that the Sceadu has twice the power to weight ratio as that of a 60 - yummy

Richard-as you inquired I run -11 0 +11 on my pitch curve in all modes and my throttle curve max is 70% with the remainder 25-30% mixed into cyclic to throttle mixing.

IMO, most people I have talked to do not realize that with the Sceadu 50 and the tremendous cyclic authority it has- you MUST use ail/elev to throttle mixing to keep the blade speed up. For instance, without cylic mixing - My blades - nearly overspeeding, flying straight at high speed into an attemp to pull a hard u-turn - the head speed was shot instantly and loss a large amount of alitude. Where as - when I try the above WITH aileron and elevator to thottle mixing at about 25%, It handles like it is on rails -barely gives up any headspeed or altitude

I think the OS50 power and Sceadu heli match would benefit from a govenor

CRAZYJAS
12-05-2001 Over year old.
 
 
DrScoles
Veteran
Location: Redmond WA

A muscle pipe costs less than a governor... I'm a huge governor fan, but you don't need one with a muscle pipe, plus you're getting a lot more performance out of the engine. I think heliproz has the whole thing for $93... Kicks major behind and acts like a governor, once you get it set up correctly(which was not difficult at all) it does not want to come off the pipe...

Richard, maybe you can make Dan think twice about giving up so soon.

I know the sceadu's power to weight ratio kills a 60 Freya but what about the 91???

New Technology is fun!

Mike
12-05-2001 Over year old.
 
 
Juampi
Heliman
Location: Buenos Aires, Argentina

Dear Richard,
I fly Sceadu with OS50 and NHP600 blades
I never had flutter problems, as many had.
I fly with + to - 10 degrees and no over overspinnig ocurred.
NHP600 are 50mm chord, rotor speed is about 1900 RPM, and flies great!
If you what to read my complete 3D report please visit: http://www.modelfuel.com.ar/heli3d/..._sceadu_eng.htm
Good Luck!
Juan Pablo Esterlizi
(Argentina)
12-11-2001 Over year old.
HOMEPAGE  
 
 
richardf
Veteran
Location: San Diego, CA Posts: Billions and Billions

Sceadu info

Juan,

Thanks for the info on what blades you are running and how satified you are with their performance. After the switch to 600mm V-Blades, the Sceadu has been smooth as silk.

I did read your web site and the fact that you changed your flybar caught my eye. After going to the longer 440mm flybar, did you leave the brass weight out? I removed all expo and was about to lighten the paddles to speed up the roll and flip rate a little, it's a little slow. Are you running any expo with the longer flybar?

Thanks, Richard.
12-11-2001 Over year old.
 
 
Juampi
Heliman
Location: Buenos Aires, Argentina

Richard,
I run with the 440mm flybar, but with no bronze weights
I still have the Pb ones, and with that I got a nice balance for 3D
I use -15% Expo, just to make it more smooth at the center stick
I fly 3D since 1997, Im actual National Champion and got 23th possition at F3C WC this year.
My 3D style is agressive, so I moved into a sharp set up.
If you have time I will recomend you to try this set up.

440mm flybar - Paddles with Pb weight - NHP600
I dont like MS Blades very much, and never tryed Vic ones...

Hope my info help you
All the best!
Juan Pablo Esterlizi
(Argentina)
12-12-2001 Over year old.
HOMEPAGE  
 
 
richardf
Veteran
Location: San Diego, CA Posts: Billions and Billions

Juan

I'll investigate your flybar arrangement. I'm and old Pattern guy and tend to fly more of a FAI F3C style, slowly slowly trying the 3D area. I crashed my standard Freya a few weeks back and hope to get my EX going again very soon, I truely miss the Freya. Congrats on your placing at the Worlds, you were flying in good company, what may I ask were you flying at the time?

Richard.
12-12-2001 Over year old.
 
 
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HIROBO Freya - Sceadu - Shuttle > Sceadu 50 pitch range
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