which engine is stronger, YS 91 or Saito 100
01-13-2002, 02:31 PM
#2
Senior Member
Thread Starter
My Feedback: (2)
Join Date: Dec 2001
Location: brooklyn, NY
Posts: 568
Likes: 0
Received 0 Likes
on
0 Posts
again
as I read down this morning I found that I ask a question which was already going in another thread.
I'll ask it in another way. I have a 40 size cap (5lbs before the engine )which I want to grossly over power so that I know I will be able to pull out of a hover with authority and some other 3D style flying.
which of these two engines will spin a larger prop?
which of these two engines do you think will be all around better for me ?
are the YS engines wide-open throttle engines or are they good in and out of the mid range?
I have no experience with either brand so I want to make sure I purchase the right one for me.
I'll ask it in another way. I have a 40 size cap (5lbs before the engine )which I want to grossly over power so that I know I will be able to pull out of a hover with authority and some other 3D style flying.
which of these two engines will spin a larger prop?
which of these two engines do you think will be all around better for me ?
are the YS engines wide-open throttle engines or are they good in and out of the mid range?
I have no experience with either brand so I want to make sure I purchase the right one for me.
01-13-2002, 03:58 PM
#3
My Feedback: (31)
which engine is stronger, YS 91 or Saito 100
Been here done this in actual use. Go with the Saito 91/100 with this model.
The YS is more powerful but is also approximately 10ozs. heavier.
A 40 size 5lb. model with a Saito 91 will be more than than adequate. I use this combination reguraly.
The YS is more powerful but is also approximately 10ozs. heavier.
A 40 size 5lb. model with a Saito 91 will be more than than adequate. I use this combination reguraly.
01-13-2002, 05:43 PM
#4
My Feedback: (31)
which engine is stronger, YS 91 or Saito 100
Moving the 2oz fuel tank rearward to CG will not make a big difference in the CG, its to close to it...
I always put the tank on CG when using a YS Engine... Its a natural...
I have weighed each the Saito 91 with a exhaust header only @ 18.91ozs and the YS 91 with exhaust header only @ 27.24ozs.
The addition of any weight forward of CG is going to be hard to absorb by moving equipment around in such a small plane...
The Saito is close to the same weight as an OS46FX with muffler...
Having used the the OS 46FX/Saito 91/YS 91 numerous times and making comparisons of completed models ready to fly weight's, across the board the YS powered models weighed in routinely 10ozs. heavier or more...
I always put the tank on CG when using a YS Engine... Its a natural...
I have weighed each the Saito 91 with a exhaust header only @ 18.91ozs and the YS 91 with exhaust header only @ 27.24ozs.
The addition of any weight forward of CG is going to be hard to absorb by moving equipment around in such a small plane...
The Saito is close to the same weight as an OS46FX with muffler...
Having used the the OS 46FX/Saito 91/YS 91 numerous times and making comparisons of completed models ready to fly weight's, across the board the YS powered models weighed in routinely 10ozs. heavier or more...
01-13-2002, 09:31 PM
#5
Senior Member
My Feedback: (3)
Join Date: Dec 2001
Location: San Francisco, CA
Posts: 1,147
Likes: 0
Received 0 Likes
on
0 Posts
46FX close in weight to a Saito 91??
Mike: I just weighed 2 NIB 46FX's I have. One has a Performance Specs piston and liner and the other is stock. Both weigh just under 16 ounces with muffler including muffler bolts and small piece of fuel tubing that stretches from needle to carb.
01-14-2002, 01:19 AM
#6
Junior Member
My Feedback: (6)
Join Date: Jan 2002
Location: North Scituate,
RI
Posts: 15
Likes: 0
Received 0 Likes
on
0 Posts
Can't top a YS
I find the YS 4 stroke engines (being pumped/supercharged) have the best INSTANT throttle response - which is what you'll need to fly out of hover, etc. - I fly the YS 91 on a .60 (sixty) size model and go unltd. vertical easily.
01-14-2002, 03:48 AM
#7
My Feedback: (31)
which engine is stronger, YS 91 or Saito 100
My numbers are close to yours Shemp... OS 46FX @ 13.2ozs. plus 3.2ozs. w/bolts for the stock muffler = 16.4ozs. or in my case I use the Performance Specialties muffler @ 3.7ozs. w/bolts.
Well 2.51ozs. is much closer than a YS 91 at 11ozs., I guess. The comparison I was drawing was its close when you consider the Saito 91 is 2.51ozs. heavier than an OS46FX. The penalty for the weight is negligible with the power you'll realize as compared to a 46 two-stroke. I'd trade the 2.51ozs. any day of the week... Then again it, would depend on the kind of airframe and flying I expected to see with the model...
Ideally all fuel tanks would be installed on CG, regardless of engine type, for obvious reasons...
When discussing, relating too or adjusting CG it is understood and assumed the fuel tank is empty. If the tank is not on CG the flight characteristic's will change from the beginning thru the end of the flight...
2oz. the weight of the tank assembly is all that you'll realize when you make comparison CG's mounted at either location. The best you can hope for is to put the tank on CG and then you'll realize 1oz. in front of CG and 1oz. aft of CG. Moving the fuel tanks weight of 2ozs. rearward toward CG from the nose is going to be negligible when there is 11ozs. more in the nose of the model with the YS... There is a ratio used to factor for weight placement on our models. 4:1, what this means is for every oz. I place on the nose of the model I'll be required to add or shift approximately 1/4oz. to the rear of the model. The inverse is true when adding weight to the tail of the model. In my example of 11ozs. computes to 2.75ozs... That's not much but that's at the extreme tailend of the model, not to easily accomplished.
Sure some models can and will benefit from a heavy engine.
Better to add power than lead...
If it was me I'd assemble the model less the engine, install all the gear that cannot be relocated and mock up the model for CG. Then you can make an educated guess at the requirements to balance the model.
Well 2.51ozs. is much closer than a YS 91 at 11ozs., I guess. The comparison I was drawing was its close when you consider the Saito 91 is 2.51ozs. heavier than an OS46FX. The penalty for the weight is negligible with the power you'll realize as compared to a 46 two-stroke. I'd trade the 2.51ozs. any day of the week... Then again it, would depend on the kind of airframe and flying I expected to see with the model...
Ideally all fuel tanks would be installed on CG, regardless of engine type, for obvious reasons...
When discussing, relating too or adjusting CG it is understood and assumed the fuel tank is empty. If the tank is not on CG the flight characteristic's will change from the beginning thru the end of the flight...
2oz. the weight of the tank assembly is all that you'll realize when you make comparison CG's mounted at either location. The best you can hope for is to put the tank on CG and then you'll realize 1oz. in front of CG and 1oz. aft of CG. Moving the fuel tanks weight of 2ozs. rearward toward CG from the nose is going to be negligible when there is 11ozs. more in the nose of the model with the YS... There is a ratio used to factor for weight placement on our models. 4:1, what this means is for every oz. I place on the nose of the model I'll be required to add or shift approximately 1/4oz. to the rear of the model. The inverse is true when adding weight to the tail of the model. In my example of 11ozs. computes to 2.75ozs... That's not much but that's at the extreme tailend of the model, not to easily accomplished.
Sure some models can and will benefit from a heavy engine.
Better to add power than lead...
If it was me I'd assemble the model less the engine, install all the gear that cannot be relocated and mock up the model for CG. Then you can make an educated guess at the requirements to balance the model.
01-15-2002, 05:28 AM
#8
Member
Join Date: Jan 2002
Location: Upland, CA
Posts: 72
Likes: 0
Received 0 Likes
on
0 Posts
which engine is stronger, YS 91 or Saito 100
Which engine is the stronger engine?
YS
Which engine is stronger?
YS
Which is cheaper?
Saitos I guess don't really know
There is a good reason that the YS engines are expensive. The YS 91 has way more power than the 100. Look at the RPM numbers for a 14x8. I think the YS is around 10,000 and the Saito is around 9,300. The numbers probably would look better for a 13 inch prop because the YS engines like smaller props at higher RPMs I believe. Save a YS 91 for a 60 size plane where the weight isn't that big of an issue and you have more room for the fuel tank.
YS
Which engine is stronger?
YS
Which is cheaper?
Saitos I guess don't really know
There is a good reason that the YS engines are expensive. The YS 91 has way more power than the 100. Look at the RPM numbers for a 14x8. I think the YS is around 10,000 and the Saito is around 9,300. The numbers probably would look better for a 13 inch prop because the YS engines like smaller props at higher RPMs I believe. Save a YS 91 for a 60 size plane where the weight isn't that big of an issue and you have more room for the fuel tank.
01-15-2002, 05:38 PM
#9
My Feedback: (2)
Join Date: Jan 2002
Location: Ossining,
NY
Posts: 630
Likes: 0
Received 0 Likes
on
0 Posts
YS rpm
If you check YS website they will recommend 8700 to 9300 rpm. Only the .63 and .53 respond well to high rpm use. They recommend a 14*10 or 15*8 for the .91.
The .91 is the only YS engine I have never owned but I still love them. They do require a little special care and feeding like the high performance little beasts that they are. Keep that in mind when you make your choice.
Anthony
The .91 is the only YS engine I have never owned but I still love them. They do require a little special care and feeding like the high performance little beasts that they are. Keep that in mind when you make your choice.
Anthony
01-16-2002, 02:04 PM
#11
Senior Member
My Feedback: (19)
Join Date: Dec 2001
Location: Evansville, IN
Posts: 2,156
Likes: 0
Received 0 Likes
on
0 Posts
which engine is stronger, YS 91 or Saito 100
I have owned both. The ys has a little more power but weighs 6.5 ounces more. The saito is MUCH easer to start and adjust. Anyone that thinks there is a vast difference hasn't owned them both.
RECAP
Saito - lighter easier to get going and tune
YS a little more powerful- heavier
Cost - virtually the same saito 100 259 at national YS 269 -279 from the ads I see presently
Take your pick, No sense in getting in arguments over it
RECAP
Saito - lighter easier to get going and tune
YS a little more powerful- heavier
Cost - virtually the same saito 100 259 at national YS 269 -279 from the ads I see presently
Take your pick, No sense in getting in arguments over it
01-17-2002, 01:25 AM
#14
Banned
Join Date: Dec 2001
Location: little rock, AR
Posts: 623
Likes: 0
Received 0 Likes
on
0 Posts
.
Well I cannot e-mail you...You do not have the stones to put your e-mail address down.....North of Canada??? I am sure my friends from Canada are totally embarassed.
This is not the forum to bash each other my friend...You e-mail me...I will return...Otherwise keep your mouth shut!
We try to keep it right here.
If you do not have the "prunes" to e-mail me...then don't run your mouth on this forum!......
I suspect you are from another site to just stir things up......Anymore of your nonsense I will report you. If you e-mail me I will know.....Please do.
This is not the forum to bash each other my friend...You e-mail me...I will return...Otherwise keep your mouth shut!
We try to keep it right here.
If you do not have the "prunes" to e-mail me...then don't run your mouth on this forum!......
I suspect you are from another site to just stir things up......Anymore of your nonsense I will report you. If you e-mail me I will know.....Please do.
01-17-2002, 12:33 PM
#20
Senior Member
My Feedback: (2)
Join Date: Dec 2001
Location: Wayne, NJ,
Posts: 1,554
Likes: 0
Received 0 Likes
on
0 Posts
which engine is stronger, YS 91 or Saito 100
The right thing to do is for the 2 of you to go back and delete every post that is off-subject and/or contains a personal attack. This is not a forum for personal attacks. It is easy to go off subject and we all understand that. If you 2 were having fun, or were serious, it doesn't matter. You should remove them and let the debate continue.
01-17-2002, 12:41 PM
#21
Banned
Join Date: Dec 2001
Location: little rock, AR
Posts: 623
Likes: 0
Received 0 Likes
on
0 Posts
delete
You missed your own point.
We are having fun on this forum...That is what this hobby is all about.
You are wayyyyyyyyyyyy to serious.
I really doubt if anyone holds a gun to your head to read posts you do not want to read.
Just scroll down or up if something as trivial as this offends you.
There was no personal attack here. Whyes is on his Dads computer.
Unwad
Regards
5
We are having fun on this forum...That is what this hobby is all about.
You are wayyyyyyyyyyyy to serious.
I really doubt if anyone holds a gun to your head to read posts you do not want to read.
Just scroll down or up if something as trivial as this offends you.
There was no personal attack here. Whyes is on his Dads computer.
Unwad
Regards
5
01-20-2002, 01:31 AM
#25
Banned
Join Date: Dec 2001
Location: little rock, AR
Posts: 623
Likes: 0
Received 0 Likes
on
0 Posts
So you were a Marine prissy boy.
Whats the matter....RCO won't let you back in the cage???
If you want to slam someone...do it by e-mail...Mine is posted......YOURS IS NOT!..
This site is not the place to bash.
You have my e-mail...bash me there....Spare all the other members.
If you e-mail me...I will have your IP.....Thats the only reason you do not.
5
If you want to slam someone...do it by e-mail...Mine is posted......YOURS IS NOT!..
This site is not the place to bash.
You have my e-mail...bash me there....Spare all the other members.
If you e-mail me...I will have your IP.....Thats the only reason you do not.
5