Pilot Chad

My Feedback: (4)

I am still thinking about what engine to get for my four star. I like the Supertigre GP 51, but want more opinons. Nothing over 90. And under .55

By the way it is a four star 40

RCKen

My Feedback: (9)

Newb,
Of your size choices you really need to consider getting a 4*60. Those motor sizes are TOO much for a 40 size plane. Yes, I know what you are going to say, you want a plane that can start you training for 3D and you want "unlimited" vertical. IMHO flying a plane with an over sized motor takes a lot of work and a great need to know how to fly the plane. Power is nice, but can get you trouble in a big hurry too. For a 4*40 I would consider from a 46 to 56 2-stroke, or a 52 to 70 4-stroke.

I'm sure there are those that are going to argue with me, and I don't deny that you can put a huge motor in this plane. But I'm also taking into consideration that this is going to be his second plane and will still be learning a lot of the basics of flying with it. A strong motor here would be good, overpowering would be bad in this instance.

That's my 02¢ worth.

Pilot Chad

My Feedback: (4)

Ken, I ment 90$. lol. PM me sometime soon.

Rubberduck

If you want to stay under $90, then I would suggest the Thunder Tiger .46 Pro. I'm putting the .61 size version of that motor in my 4* 60.

RCKen

My Feedback: (9)

Newb,
Sorry, when you said 90 I thought you were referring to a .90 sized engine. Sorry

Pilot Chad

My Feedback: (4)

ken, no prob. lol that would be pretty funny though.

WILL NOT GET ANY IDEAS WILL NO GET ANY IDEAS[:@]

I was also looking at that one rubberduck.

Chevalier

If you were to look closely at how a 4*40 is made, you would probabily reconsider the motor choices. Some small basswood spars,No leading edge sheeting, 9 ribs to each wing half, and some spar webs make up the wing. There just isn't that much holding the plane together, so In my opinon any .40 size motor will do. My club holds 5-6 pylon races a year for 4*40's with Super Tiger GS40 engines. With 9-7 or 10-6 props and these $50 dollar motors these planes are really quite fast.

Connery

I had the OS 40LA in mine and it was way underpowered. A 46AX or 50SX would be perfect, or the TT 46 that Rubberduck recommended.

exeter_acres

My Feedback: (2)

.46 size will be MORE than enough ...this can be a fast plane....

Campy

My Feedback: (1)

In your price range ($90 or less), I would seriously look at the Thunder Tiger Pro and the Evolution engines.

They are both user friendly and very well made with power that will equal or exceed the OS 46AX.

IMHO, you will not go wrong with either engine and the price(s) are in your budget.

bruce88123

I was thinking of a Quadra 50s, ought to hover real good.

bruce88123

Oh, sorry. Thought you were asking about MY next plane. Nevermind. My bad, as they say.

Geistware

My Feedback: (16)

I would go with the 51 2 stroke in a 4 star 40.
If you are building it, you may want to taper the wing tips.

Fastsky

Super Tigers have given more than few people problems trying to tune, myself included. The carb barrel also jams on a lot of them unless you know how to remove it and machine the rough edges off. This is a fast plane with a 46 on it. Any bigger and it would be scary, especially if you don't have a lot of experience. Actually I have seen some pretty scary speeds even with the 46. If you can afford it and want outstanding performance go with the 46AX. If you want to go a bit less expensive then I would sat the TT46 or 46PRO are very good choices. If it were me I would get the 46AX and not look back!

Cogburn

Since you are building from a kit a light powerful motor might be more fun than a heavy Ball Bearing motor. I had a fox 40 bushing on mine. The 4*40 I had was built very light. The guy that built it installed a new fox 40 bushing and flew it several years. He sold it to the guy I bought it from who flew it 2-3 years. I bought the plane(still had the fox 40) and flew it around 5 years. The covering started coming off and I sold it to a newbie for a second plane(I still miss it). He recovered it and is having a blast with it. The Fox 40 has way more than enough power. It is very light and It will probably last forever. Sheldon's sells them for 71$.

http://www.sheldonshobbies.com/listing/fox.html

Edit: Wow seems they haave a sale right now! 54.99$ for the Fox 40 bushing engine.
http://www.sheldonshobbies.com/listing/airhd01.html

Pilot Chad

My Feedback: (4)

I think i have made my decision to spend a few extra bucks and get the OS 46 AX. It will work much better for me. I think I will get a prop that will make tourque instead of speed. What would be good for it? This way when i first get it I can go full throttle with no worries

shakes268

I'm running a 46 AX on my tiger 2 and an 11 x 6 prop. It's fast but has good pull too. Could run faster with a 10 x 6 but it's fine the way it is. I think its a nice combo.

bruce88123

Here is the 46 AX manual: http://www.osengines.com/manuals/46ax-manual.pdf

Try a 10x6 or 11x6. should give great vertical and yet keep the speed down.

Bruce

josefmd

My Feedback: (24)

Hi,

I just bought a Four Star 40 that has been pre built from the kit and I am planning on running a O.S. 46 FX that I just bought here on RCU. It's now on my Avistar, and man that motor really rocks. I am still in the process of breaking it in have only run a few tanks thru it. Do you guys recommend sticking on a 10X6 prop, or something bigger? I can't wait to throw in the radio gear and motor in fly this bird. What I have read, it is sweat flying airplane.

Take care,

Matt

Connery

Bruce, you've got that backwards. The higher the second number the faster the speed will be, the lower the number, the better the vertical will be.

newb and Matt, with the 46AX and the tall landing gear, I would go with either a 12x4 or 11x5. I currently use an 11x5 on my SSE with a 46LA, and it's the best I can get with the engine I have. With the 46LA, you will much better performance. Also remember that you control the speed with the throttle, so find a prop that works best for the type of flying you want to do, and then just cut back the throttle when landing or just flying around.

bruce88123

I had nothing backward. Using the propeller range recommended by OS I selected the 2 with the minimum pitch thus giving the least speed for a given RPM. The engine needs to maintain a proper load and under pitching it does not accomplish that. There is also no need to go to a 12 inch prop on a plane/engine of this size. Of course reducing the throttle is the best way to limit speed but we are talking about a new flyer here who is going to be tempted to "floor it" and the lower pitch will also slow the plane down better for landing and yet "pull" stronger for go-arounds

josefmd

My Feedback: (24)

Hi,

As always, thanks for the great info guys! This plane is actually going to be my fifth. I started out with a Superstar Select but got bored with it pretty quickly. I have a Kyosho Tiger Moth, which I just sold, GP Piper Cub ARF, and a Avistar. I just want to get into some beginner to intermediate aerobatics a step up to what the Avistar can do without going crazy and spending a lot of money.

Have a great day!

Matt

britbrat

Matt, a 10-6 is pretty light -- it is really a break-in prop for for an AX engine. At full throttle, it will be turning close to 16,000 rpm in flight -- lots of noise, lots of wear & less performance with that airframe than could be achieved with a better prop match. An 11-6 is a good choice for that plane & engine combo. If you are concerned about excessive airspeed, & IF you have sufficient ground clearance, a 12-4 is also a good choice -- that would easily give you unlimited vertical, but limit top speed to somewhere between 50 & 60 mph.

bruce88123

Actually, OS does say 10.5x6. I missed the .5 part. Sorry about that. I would use the 11x6 myself in your position for initial flights, you can always move up.

Fastsky

I have an APC 11-5 and on my 46FX and its a good combo. Great pull, lots of speed and good braking action for landings.