3W Twin Spark, Worth the $$$?

[Super08]

Here is the link to the data base we have going.

https://docs.google.com/spreadsheet/ccc?key=0ArZJMou7QpoHdEt3ck5vbnUzSXpTTTgwNmNfMUkxRXc#gid=0

 

[Andrew Bird]

My 110CS has been insanely good. I got on really well with my DA120 but the 110 just has so much torque and is so much smoother. I'm looking at a 170CSTS for my new plane.

 

[BVargas]

There's a 3 gallon old 157TS with exhaust for sale on FG.

 

[Super08]

Andrew I have the 170CS single spark and I can tell you it is also a great engine. Just as good as the 110 if not better. Runs smooth as butter.

 

[Andrew Bird]

I'm going to build a second Comp arf 3.1 330SC. The original with a DA200 is fantastic but want to build another with the same power but the versatility of a twin so I don't need to worry about it quite so much in 3d. 3w gets a bit of bad press but the 110CS on pipes and redline has just been so smooth, linear and powerful, I want more! I'm thinking the 170 on K&S 1090's should be the ticket. The additional weight of the twin ignitions could be helpful as I want to use the same set up as my current plane and put the rudder servos in the tail.

 

[Super08]

I don't recall if I mentioned it but my 210CSTS picks up close to 200 rpm with both ignitions turned on verses only one.

 

[Tired Old Man]

Sounds about right.

 

[wahoo]

I'm not an engineer, so maybe someone can enlighten me on why they can only twinspark cylinders of 75cc and larger ?

 

[Classclown]

Would you pay 800 dollars for a 50cc engine? I wouldn't.

 

[Tired Old Man]

I'm not an engineer, so maybe someone can enlighten me on why they can only twin spark cylinders of 75cc and larger ?

Not true, they do them for engines half that size but you wouldn't want to pay the price. Clown is correct in what he says to a point. His pricing structure is way too low.

The limitation is for the modeling public. The deep pocket defense and corporate folks have a wider selection.

 

[ben_beyer]

Out of curiosity, has anyone ever tried a 30x12 3 blade like the one from Air Models on a 3W 170 CS/TS or CS?

 

[Bunky f. knuckle]

Nope, but a friend of mine runs a 30x12 Xoar ENP on his 170. Ear plug alert!!

 

[ben_beyer]

He needs to but a bigger prop on that motor!