RunRyder - Custom Raptor 50 with a YS91

rrTV-PHOTO

New HD TV

HOME rrTV-PHOTO GALLERIES MY GALLERY HELP-FAQ

myHOME PM pmRR MEMBERS 515 ONLINE 41 EVENTS SEARCH REGISTER START HERE

1 page

4293 views

POST REPLY

Ron’s HeliProz South	.	Century Helicopter	.	MTA Hobbies
	.		.

Speed - Performance - Drag Race > Custom Raptor 50 with a YS91

TurboStew
Senior Heliman
Location: Ft Collins, CO

Fellas,

After moving to Colorado from the mid-west, I was really disappointed with my old Ergo 50 at 5000+ feet, so I decided to design and build a high-altitude machine. I call it "What the Heli".

Pics are old, now have V 600s and V paddles:

http://turbostew.mystarband.net/images/Rad91LC.jpg
http://turbostew.mystarband.net/images/Rad91LF.JPG
http://turbostew.mystarband.net/images/Rad91RC.JPG

My goals were simple with this machine. I wanted a powerful 3D machine that flew with the power of a 91 at sea-level and be very cheap to repair. I feel I have achieved it. I have flown it about 20 flights and I am in love. Very powerful and fast, does 200' loops with ease. I pull +13/-12,5 degrees of pitch on Maverick 600s with no bog, even in tick-tocs. It has held up well thus far. Here is the breakdown.

YS91 w/MP2 on Coolpower 30%
Custom CNC carbon frames (I own a CNC Bridgeport)
R50 boom back
R50 main gears, shaft, head, swash
86 tooth main gear, 12 tooth pinion(7.18-1), 1950 head speed
GV-1
R90 clutch, clutch bearing blocks
Vigor motor mount and cross members
Voyager main shaft bearing blocks and landing gear braces
Metal head block
Bergen 60 fan and shroud
DS3421 JR mini servos on CCPM
Sullivan 16oz round tank
8lbs, 7ozs dry weight
Raptor 50V1 canopy

Regards,
Turbostew

8.5 pound 90 birds Rock!

08-14-2004 Over year old.

Al Magaloff
rrMaster
Location: 12,199 Posts- Enough Time Wasted. See Ya!

Nice job . Any more frame sets?

08-14-2004 Over year old.

rckrzy1
Elite Veteran
Location: Hurst Texas

when do you go into production?

Wildcat Fuels

08-14-2004 Over year old.

TurboStew
Senior Heliman
Location: Ft Collins, CO

I have not flown it at lower altitudes. The high altitude is the likely reason it holds up well. We loose 20% HP on our engines plus the lower density air relieves stress on the blades. Even I feel the pitch I run is conservative, no bog with full collective and full cyclic, scary. I would only use a 60 at sea-level and a 70 from 2500ft to 4500ft. I am building frames for a couple of locals. Depending on how she holds up against fatigue over the long haul and public response will answer the production question.

8.5 pound 90 birds Rock!

08-14-2004 Over year old.

eric_b
Veteran
Location: Denver, CO, USA

That engine is not big enough for that copter. You should have made it a twin with 2 YS .91's.

I can't wait to see it bore holes in the sky!

08-18-2004 Over year old.

HOMEPAGE

Peter65
Key Veteran
Location: Roxby Downs, South Australia.

Definately think about going into production. Looks awesome. My only problem is the under canopy tank.

I think you should come up with a name too

Not much Rappy left there

Laughing at yourself will lengthen your life. Laughing at me will shorten it...

08-18-2004 Over year old.

HOMEPAGE

TurboStew
Senior Heliman
Location: Ft Collins, CO

Thanks guys! I have thought a lot about doing a new version with the engine forward facing and a rear tank. I notice CG changes in flight and can't see the darn fuel level.

8.5 pound 90 birds Rock!

08-18-2004 Over year old.

eric_b
Veteran
Location: Denver, CO, USA

If you re-engineer it to be a twin, you can have one engine facing rearwards and one engine facing forwards and two tanks on the sides.

You could call it "Double or Nuthin"

08-18-2004 Over year old.

HOMEPAGE

TurboStew
Senior Heliman
Location: Ft Collins, CO

If I did that the poor Rappy main gear might look like the fella's with the OS 91 ducted fan engine.

8.5 pound 90 birds Rock!

08-18-2004 Over year old.

duraace9sp
Senior Heliman
Location: los angeles area

cool

...id love to see this fly here in los angeles/sea level!!!

08-18-2004 Over year old.

1 page

4293 views

POST REPLY