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Model Rectifier Corp . PowerHelis . JR-Spektrum

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Align T-REX 600N 700N > t-rex 600 n sport fitted with ys 91 st 4
 
 
ady
Senior Heliman
Location: norfolk england

the os 91 likes 8.27 gearing so that would mean getting new gearing sorted while the ys 91 st not sr like 8.45 , the rex uses 8.5 so thats close enough

12-26-2007 10:00 PM
 
 
Eury
rrProfessor
Location: Ankeny, IA, USA.

Well, I've got a new Sport on the way to try this out on, I'll be using a YS61, and if that's not enough it'll go to a YS91. The heli was cheap, only $335 shipped from A-Main hobbies.


Nick Crego
I swear to God, I'll pistol whip the next guy that says Shenanigans
12-26-2007 10:18 PM
 
 
hootowl
Elite Veteran
Location: Garnet Valley, Pa.

I've heard a 61 isn't really any more power than the newer highpo 50's.

"Any man who says he is an American, but something else also, isn't an American at all.
12-26-2007 10:37 PM
HOMEPAGE  
 
 
Eury
rrProfessor
Location: Ankeny, IA, USA.

Talking to people who've flown them back to back in another heli, the 61 is a pretty big difference. it has significantly more torque, and a little more HP, it makes it much harder to bog. Especially the YS61, it makes as much power as an OS70, but is more consistent.


Nick Crego
I swear to God, I'll pistol whip the next guy that says Shenanigans
12-26-2007 10:39 PM
 
 
Jay1
Veteran
Location: Colorado Springs

Eury you are right about the YS .61 having more torque than the .50. I was originally going to use that motor but I got my hands on a .91 so I decided to us it.

Jay
Sooner or later, Gravity will win!
12-26-2007 10:43 PM
 
 
Eury
rrProfessor
Location: Ankeny, IA, USA.

I figure I can put a 91 if I'm not happy with the YS61, but since I've already got a couple YS61s on a shelf at home with matching Hatoris, I may as well try them. If that happens, I'll pul the 91st w/ Viperhead out of my Freya and put it in, and replace it OS 91SZ in the Freya, since I've got the gearing for both for that heli. I'm betting that I'll be more than happy with the 61 though, the only reason I ordered the 600N today was to try this out since I've already got all the parts.

Oh yeah, Jay, I still haven't made it to the Post Office, despite having that OS I said I'd give you all boxed up, do you still want it? I'm guessing no since you seem to have picked up a couple other motors already.


Nick Crego
I swear to God, I'll pistol whip the next guy that says Shenanigans
12-26-2007 10:50 PM
 
 
Jay1
Veteran
Location: Colorado Springs

Quote 
Oh yeah, Jay, I still haven't made it to the Post Office, despite having that OS I said I'd give you all boxed up, do you still want it? I'm guessing no since you seem to have picked up a couple other motors already.

Nick, don't worry about it. I figured that since I saw some deals I just went ahead and bought them. You see how I done mine so you should have no issues in getting yours done. If you have any questions, just ask and I will get u set up.

Jay
Sooner or later, Gravity will win!
12-26-2007 10:53 PM
 
 
Eury
rrProfessor
Location: Ankeny, IA, USA.

Digging through my parts boxes, I've come up with a mount that I think is from an XCell Pro 2 (IIRC, I just dumped a bunch of misc things in there) that will work well. It's about 1mm too wide, but that's easy to take care of,and since it is a solid 1 piece mount it should serve to add some strength to the frame.


Nick Crego
I swear to God, I'll pistol whip the next guy that says Shenanigans
12-26-2007 10:57 PM
 
 
Jay1
Veteran
Location: Colorado Springs

Yup and thats why I used a solid piece Vigor engine mount. It will spread your frames just a wee bit but it is not bad at all. If you look at the bottom, all you have to do is screw into the mount and the 2mm bottom frame and it will add that stability you need.

Jay
Sooner or later, Gravity will win!
12-26-2007 11:02 PM
 
 
Eury
rrProfessor
Location: Ankeny, IA, USA.

The mount I'm going to use has enough meat that I think it can be taken down so it doesn't spread the frames, We'll see how it works, I'll report back when I get it done, the heli should be here on Monday.


Nick Crego
I swear to God, I'll pistol whip the next guy that says Shenanigans
12-26-2007 11:08 PM
 
 
ady
Senior Heliman
Location: norfolk england

flew again today and used a sedate 2050 headspeed , worked really well and could`ve flown her all day , will try again soon with a 2150 headspeed what i normally use as the engine is beginning to loosen up
12-27-2007 08:36 PM
 
 
george0079
Elite Veteran
Location: Terra Firma

Hey ady

What are you getting for flight times at that head speed?

The older I get, the shorter my attention....... Oh look. A shiny penny..

Steve
12-27-2007 09:59 PM
 
 
ady
Senior Heliman
Location: norfolk england

oh , i didn`t time it , wasn`t to bad , felt similar in time to when i had a 50 in it, if i get out tomorrow i`ll time it and post , felt good tho , best conversion i done
12-27-2007 10:11 PM
 
 
george0079
Elite Veteran
Location: Terra Firma

Have you got yours leaned out to peak performance yet?

The older I get, the shorter my attention....... Oh look. A shiny penny..

Steve
12-27-2007 10:13 PM
 
 
baddraptor
Elite Veteran
Location: valencia, ca- usa

Isnt 2100 rpm on the head putting the 91 well outside of its max rpm?? I thought there max peak was somewhere around 15400. With 8.5 gearing and a 2100rpm head that would put the motor somewhere around 17000.

**Unattended children will be givin a shot of espresso and a puppy**
12-27-2007 10:14 PM
 
 
george0079
Elite Veteran
Location: Terra Firma

Not on the YS 91ST. That's why I chose this motor. Max servicable RPMs is around 17000

The older I get, the shorter my attention....... Oh look. A shiny penny..

Steve
12-27-2007 10:16 PM
 
 
baddraptor
Elite Veteran
Location: valencia, ca- usa

Hmmmmm, and I know a raptor 90 torque tube will work. Anyone going to stretch it for 690 blades??

What are you guys weighing in at with the 91??

**Unattended children will be givin a shot of espresso and a puppy**
12-27-2007 10:17 PM
 
 
george0079
Elite Veteran
Location: Terra Firma

I'll be putting mine on the scale tonight when I get home. I'll post it then...

The older I get, the shorter my attention....... Oh look. A shiny penny..

Steve
12-27-2007 10:20 PM
 
 
ady
Senior Heliman
Location: norfolk england

it doesn`t seem far from it now george0079 , i`ve always ran my engines at peak or just over ,like the sound too , if it lasts a year i`ll be happy , may even put one on my rappy 50
12-27-2007 10:22 PM
 
 
ady
Senior Heliman
Location: norfolk england

thats what i ment to ask before , mine weighs 3750 grams , be interesting to see what others weigh
12-27-2007 10:23 PM
 
 
14 pages [ <<    <     1      2     ( 3 )     4      5     NEXT    >> ]10182 viewsPOST REPLY
Gyro Hobbies . E-flite . Next D

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Align T-REX 600N 700N > t-rex 600 n sport fitted with ys 91 st 4
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