I am thinking about puting in a 4c engine in there. what is the recomended engine size? I have been told many times at the field that I need to "over engine" my planes by a little bit to get them to fly like they are supposed to (some say its the altitude) and they over prop by a little bit. what could I get into a 4* 40?? I might go 2c but 4c sounds so much better. HHHhhhmmmm, decisions decisions...


sarge

2C engines are nice to run, its simple to use. The TT46Pro is totally reliable, so are engines like SC/MVVS/OS etc. Of course 4C engines are nice, you have to choose between a 70 sized (OS70FS, Saito 72/82) or a 50 sized one (Saito 56 Magnum 61 OS 52). If you just want to enjoy the 4* and not bother about how fast the plane is gonna go then any 50 sized 4C will be fine but then later on when you want to move on that engine choice will kinda limit your options. For me its the SA82, best choice on the basis that its more versatile. Still engines like the Magnum 61 is cheap, very reliable and fuel consumption is very very good.

Anyways, how high are you at?

thanks Im lookin at a OS 50-sx or a OS 46-fx. just depends on which seller has the better deal. I think the 50 will be great for this plane, so many 4*s at the field and they play these tag games all the time a 50 in a 40 sized plane should be a blast. thanks all!!

if you know that you will proceed with this hobby, my personal advice is that you get a 4c : ) they sound sooooooo much better. actually i hate the 2c sound

I have the 50SX in my 4* LOTS of fun. Clipped the wings one bay for even more fun, and it still mush-stalls and floats on landings. I would recommend, even if you build the wings full size, adding extra hinges 1 bay in from the wingtips so they can be ready for clipping in the future.

Scott

my favorite engine is the ys 63. Physical size wise it is smaller then an os 70 but it has immense power for its size. On my 40 size profile it has unlimited vertical performance. Hand launches by flying out of hand are possible. run one tyank on the ground to get it tuned in right then run it a little rich in the air to finish breaking it in. they have a tendency to overheat if run on the ground too much for break in. they work great if broken in in the air and are extremely reliable

For the 4* a YS 63, OS 70, or Saito 72

If you're gonna stick around this hobby, you can go LOTS of places with any one of those three engines.

But you can fly super fast with the 50SX! Hehehehe ... turn a nice 11x9 prop at like perhaps 13K RPM! Yeah 4C engines are nice but then I still do enjoy my 2C engines. For 3D i have to admit 4C is the way to go, it may have less RPM but the throttle response is just so sweet.

Sarge: I have the Four Star 40 and have used three engines on it so far: the Evolution 40, worked out ok, lacked power, then switched to the OS46FX, ran just fine but I wanted a little more in the vertical, so I switched over to the OS50SX which flys just great. Keep in mind that prop selection will also make a difference in how it will perform with various engines.

I have an OS52 Surpass that I was going to put in that plane but at 1.1 bhp it just didn't seem to have th umph I was looking for. Besides, the throttle is on the other side and to the rear on the 4C which would have made for some fun with the servo re-locate or at least the relocate of the servo linkage to the carb.

DS.