I like to know what propeller to use with this engine, The Evolution 61 NT. The manual does not says any thing about it.

Something around the 12x6 to 12x8 size ????

Only Two Propellers ? I install this engine to Extra 300 S 60 of Seagull Models.

That sounds about right

I experimented with different props and found the APC 12x6 seemed to work best for me on that engine. Just the right amount of torque without sacrificing a lot of speed. The Evo .61 is a good engine. I ended up selling the plane (Ultrastick 60) and engine to my brother. If it was a dud I wouldn't have sold it to my brother!

I planing to use 12x6 scimitar propeller, is that ok ?

The scimitar will probably work just fine.

Thank you I wil try this weekend.

Straight from the Master Airscrew technical bulletin on props:

2-Stroke Engines

.049 - .051 = 5.5x4, 5.5x4.5, 6x3, 6x3.5, 6x4

.09 - .10 = 7x3, 7x4, 7x5, 7x6

.15 = 7x6, 8x3, 8x4, 8x5, 8x6, 8x7

.20 - .25 = 8x6, 8x7, 9x4, 9x5

.29 - .35 = 9x6, 9x7, 9x8, 9.5x6, 10x4, 10x5, 10x6

.40 = 9.5x6, 10x4, 10x5, 10x6, 10x7, 10x8, 10x9

.45 - .50 = 10x7, 10x8, 11x4, 11x5, 11x6, 11x7, 11x7.5

.60 = 11x5, 11x6, 11x7, 11x7.5, 11x8, 11x9, 11x10

.71 - .80 = 12x6, 12x8, 13x6, 13x8, 13x10, 14x8

.90 = 13x6, 13x8, 13x10, 14x6, 14x8


As you can see, there is a fair variety to select from. Don't be afraid to experiment within reason. You will be able to tell fairly quickly what works for you . Good luck.

According to Power Point's top flight chart you can use the following,
11 X 6 , 11 X 7 , 11 X 8 , 11 X 10 , 12 X 6 , 12 X 8 ,been using the 12 X 6 with success.

Thank you BINGO FIELD and 5_SPOT those charts are very help full..

The ads for the EVO engine state that they get 12000 rpm with an APC 12-6 prop. This sounds like a pretty strong engine if thats the case so thats what I put on the front. The first days flying I only got around 11,300 rpm which was dissapointing. The next time I took it out it started to pick up revs. After a few flights I was getting 11,600 rpm. By the end of the day I never checked the rpm but the plane was burning holes in the sky and I am really begining to like this engine! Based on this I would throw on an APC 12-6 and go have fun![