I'm looking for a quite but powerful 40 glow engine and was wondering if this best fit the category...

http://www2.towerhobbies.com/cgi-bin...&I=LXFV71&P=ML

How would you rate that engine?

How quiet is it?

Would you recommend a different one?

What do you mean by quite???

if noice is your biggest concern i may have to point you towards the "e"vele side.

oops! Guess my typing was too fast..

I meant quiet

No, that was my typo. What do you mean by "quiet"??

Ken

Low noise level

The predominent source of noise from this engine most likely is the prop. Use the largest props recomended to keep the RPM down and consider mounting the engine on elasomer isolation mounts to keep the engines vibration out of the airframe. APC props seem to make less noise than the square tipped Master Airscrew props do. Pusher props really wail.
I ran APC 11x6 props on a OS .46 FX that was mounted on Du-Bro iso mounts. This plane could almost have passed for an electric plane while in the sky. If someone else was flying one of those noisy four-strokes, my plane would be completely drowned out.

All glow two strokes are loud. You have to get a different muffler set up or get yourself a four stroke. They are much less noisy.

Gibbs

Everytime I bring out my Evolution 1.00NX equipped Funtana 90S to the field I get the SAME comment.

Nice plane, good flyer, sorta loud.

Eh, well it's not really any louder than most of the mid sized 4 strokes we have at our field. e.g. anything bigger than 1.20 and up.

The problem is that the engine fires more often, and that is perceived as being louder... from a DB standpoint, it is not.

The noise is coming from the muffler not the prop on this plane. I've been down the path of attempting to quiet it down.


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That said I've been very impressed how relatively quiet the AX and LA engines seem in comparison.

The latter of course produce less power, but they sure are soft sounding using exactly the same prop on their much noiser bretheren.

So is the super tigre quiet and powerful or not?!

That is VERY opnion based question.
powerfull- compare to what? what are you comparing it to? if your comparing to a .15 its extremely powerful if your comparing it to a .91 its not worth poop.

quite- what the h*ll do you mean by that? Like is quite tv volum quite like old car running? what do you defin as quite? were are you flying? if your flying over you neghbors it wont be quite enough anf for that fact no glow motor will be.

AS i said erlier if you need all out sound less operation go for an electric. im sure you could google search db volums for the engine evan i bet you could email tunder tiger and get them to tell you.

You will be surprised at just how loud an electric plane can be when the motor is powerful enough to spin a 10x6 at glow engine rpm.

The Super Tigre GS-45 is a powerful motor. It probably wouldn't meet most standard definitions of "quiet," but there are some things you can do to reduce operating noise. Operating with a three-bladed (or four-bladed) propeller instead of a two-bladed propeller will help reduce overall noise. If the engine still seems noisy, try to fly at a high altitude so you don't have to listen to it so close-up.

Why the hell would I be comparing that to a 0.15 or 0.91 engine? It's pretty obvious that the comparision is between other 0.46 engines. Is it powerful for 0.46 engine? Is it loud for a 0.46 engine... duh...

My Evolution 46NT is MUCH quieter than my GMS engines. While flying it (LT-40) at any distance, its hard to hear
the engine running.

The Evolution muffler has an actual baffle. The GMS "mufflers" appear to be nothing more than
an expansion chamber (and a place to connect the fuel vent line).

Don't know about other engines though...

Well you know what. join a club see what they use. if everyone else use thundertiger then go for it everyone else is using it should be quit enough. but i must still ask why it needs to be so quit. a .46 is not going to be the loudast motor at the club which leads me to belive you flying off a private property.. kinda worring but what the hell I have herd one and it is comparable to the os ax ut the ax had more power.

I have my reasons for needed a quiet engine...

So evolution engines are quiet?

I have an OS .46 AX with either a 12 x 4, or an 11 x 6, and from my personal experience, I preceive it to be a quiet engine, compared to other .46's I've seen at the field and my .46LA. If I'm the only one flying, its hard to hear it sometimes. If there are other engines running on the ground or in the air, you can pretty much forget about hearing it at all.

Most sport engines of a similar size are pretty much equally powerful and the ST GS45 is no exception. It's a very nice engine. I picked up a second hand one from you-know-where and it runs great, one flick starts at any throttle setting right up to full throttle and that's on zero nitro fuel.

Exhaust noise depends on the muffler. Some are (comparatively) quiet but usually at the expense of having baffles which can reduce the ultimate power a little but for normal sport flying that doesn't matter. I wouldn't call the ST quiet but it's not an ear blaster either. Any engine can be quietened down by running a large enough prop to keep the revs down though. Or using an after muffler.

For quietness, I believe it is important to over power the plane somewhat. For example, a sixty running at 2/3 throttle makes about the same power as a forty running wide open but makes less noise and probably uses less fuel as well. I did something like that with a Kadet Senorita. I removed the .25 FP and replaced it with a .40 FP. The larger engine didn't have to work as hard to fly the plane so it ran lower rpm most of the time with the throttle only about half open. As a result, the flights were actually longer on the same fuel tank and a neighbor of mine actually did mistake it for an electric plane. However, in the hands of some kid who runs the engine at full throttle for the whole flight as he bores holes in the sky, a bigger engine will indeed be louder and thirstier.

I have the TH .46 which is pretty close to the GMS engine and muffler.

I also have O.S. .46 AX, O.S. .46 LA, and Evolution .46s (I do have other brands, but not in .46).

I would rank them in this order with the top being the least noisy.

OS .46 LA
OS .46 AX
Evolution .46
TH .46 (about the same as the GMS .47).

The TH .46 is definitely the loudest.

The TH .46 and the OS .46 AX produce about the same amount of power and both are pretty powerful little engines.

The Evolution .46 is no slouch either. But it is a tad louder than the AX.

Of you were trying to choose between the GMS and an O.S. the OS is just easier to deal with hands down.

The GMS is far cheaper but you'll spend far more time getting it broken in and tuned up than you would with the OS .46 AX.

The Evolution, well, I LIKE the Evolution a lot, except for those lousy limiter collars that you'll want to remove.

Once you remove them the needles tend to walk. A lot of unneeded grief. Something that I'm going through...

(Anyone know of a drop in replacement carb for an Evolution 1.00NX with the same "walking" problem?!).

The OS .46 AX engines are the newer version of the 46FX. The muffler is boxier in shape on the AX and is as quiet as I have seen for a 40/46 size engine. The engines are more expensive than the others in the same size range but you are rewarded with one of the strongest running engines in its size and also just happens to be easy to adjust for reliable running. This is a very user friendly engine but its about twice the price of the ST45. Super Tigers aren't a weak engine but can't compare with the power output of the AX. The ST engines are generally more finicky to get them to run reliably and they have a rough finish on the throttle barrel which can suddenly cause your throttle to jam. The throttle barrels on the OS are silky smooth. If you are looking for a more budget friendly engine you should check out the Thunder Tiger 46 PRO. Running wise its just as strong as the ST engines. Its more expensive but runs quieter and is far more reliable and easy to tune like the OS engines. Would you rather spend a few more dollars now and be flying or go cheaper and spend lots of time doinking around trying to get the engine to stay running?!?

Re: "(Anyone know of a drop in replacement carb for an Evolution 1.00NX with the same "walking" problem?!)."< I have the same problem with my 60 size EVO engine. I can see the needle valves start to turn when I throttle up!! I have never been able to get more than 1 flight without the engine acting up. Thats why I have a TH 60 throttle barrel on order to try in the beast of an engine. If it won't behave with this, then I will haul out the new carb and chuck the engine. [>:]

Yeah what an annoyance and detriment to what would otherwise be a great engine.

The one or two flights I had my 1.00NX running perfectly for, I was soo impressed with it, but next trip out at the field, and it's like I'm starting all over again to try to tune the engine.

Evolution must get this limiter stuff out of their heads except for possibly the PTS and then only if they have indeed tuned it PROPERLY for different environments before shipment, and STATE what fuel to use, etc. so that their settings do work.

They are using the "factory set limiters" as a seller feature to great success I might add. Based on the other EVO engines that showed up at my field, its very hit and miss wheather the engine will run half decent out of the box. Some have indeed run great out of the box and others wouldn't stay running. It turned out that on some, the low speed needle valve was completly closed!! What kind of &&^*((@##$%** factory setting is that!?! [>:]