samdimaio

My Feedback: (106)

Need help on initial engine set-up for ys61r rear exhaust long stroke installed in la-2:

• recommended prop size range
• glow plug
• fuel mixture - nitro/oil content
• pipe length as measured from glow plug to end of pipe, or to the first pipe baffle - using hatori 650 pipe
• low speed setting

been running rear exhaust ys 60fr short strokes for some time but have no experience with the year exhaust ys61r long stroke engine

Atlanta 60

My Feedback: (18)

These are my recommendations:

Standard YS 61R LS (Not AR version)

12x10 APC prop
OS #8 plug
YS 20/20 fuel...Needle 1 turn out + 3 clicks...
I'd start with 20.5" from the glow plug to the first baffle and shorten in 1/4" increments....You will probably see @ 10.5 - 11.0k max static rpm which is my personal target...(My pipe lengths normally wind up around 19.75"...I'm probably tuning a tad conservative but prefer not being on the "razors edge")
Low Speed = Regulator screw flush with body...If I adjust at all I go in 1/16" increments but try not to touch it...

Good Luck with your LA-2!! It's a fantastic airplane!!

Please post some pictures!!

P.S. For an AR version the only differences are 12x12 prop and 9.5-10.0k static RPM's...

samdimaio

My Feedback: (106)

thank you, this is great info.! will send some pictures.

Dave Harmon

I had much better performance using the Enya #3 plug. This plug is much hotter due to the increased platinum in the wire and will support a much richer mixture than the OS #8 which contributes to sudden flameouts.
The Hobby Shack Performance #3 plug is an Enya #3 replica and will work well if you can find them anymore.