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        Help! Best 0.46 cu. in. Nitro Engine?

#1 gr_yamms Oct 01, 2012 01:55 PM

Best 0.46 cu. in. Nitro Engine?
Hello All,

I've been comparing a lot of .46 cu. in. engines (OS, ThunderTiger, Magnum, ASP, etc.) They all have comparable power output (1.4-1.6 hp), but big variations in price. Any recommendation on the best performing engine? And what about your recommendation makes it the best?


#2 hutchinstuff Oct 01, 2012 03:55 PM

I love the os 46ax or fx. They run pretty reliably and are very easy to tune, run well rich. I had a thunder tiger 40 that was nice enough as well. had good luck with mags too! If I were gonna get another 46, I'd get - 46 ax if going used. magnum 46 if going new (as they are a lot less and have a good rep.) they are all going to weigh about the same, turn similar props with similar power. I bet if you cowled an engine and swapped my os with a magnum, TT ..... I wouldn't even know the difference.

#3 iAlex Oct 01, 2012 05:13 PM

Jett Engineering Sport Jet .46 wins this contest hands down. But yet you pay for the performance in cost. Mine will turn a 10x6 prop at 16K all day long on the ground. In the air it unloads to around 17K or so. It's a "piped" engine so I wouldn't use it for 3D type flying, but for eveything else you can't beat it. If your cost conscious then it's not for you. But if you have ~$300 burning a hole in your pocket...

#4 Jim Thomerson Oct 01, 2012 05:29 PM

I had an ASP 46 pass through my hands. I ran it on the bench with 10% nitro fuel and APC 12 x 6 prop. It hurt my ears to the point that I shut it down. I haven't experenced anything like that since I ran Control Line Rat Race engines without ear muffs.

#5 Roto Rob Oct 01, 2012 05:38 PM

Kind of depends on what you want out of it, and what your putting it in. An engine good for a 3D plane, will probably not be near as good for a high speed jet.

#6 gr_yamms Oct 01, 2012 05:45 PM

Thanks for the responses everyone. iAlex, I did see Jett, and I also saw their price. However, I couldn't find its power output anywhere on their site.

Roto Rob, speed is not really a desired characteristic for this project.

Hutchinstuff, by following your advice, I would probably go with the TT or magnum based on other threads that I've read--about the same performance but a lot lighter on cost.

Do any of you advise gear reduction if I want to get ~8lbs of thrust from any of these engines? (Assuming a 11 x 6 prop)

#7 Hemikiller Oct 01, 2012 05:49 PM

Manufacturer's rated power output is to be taken with a grain of salt.

IMO, the best deal going is the TT46 engine: OS quality without the ridiculous parts prices.

#8 jeffie8696 Oct 01, 2012 05:59 PM

I agree with Hemi. My Thunder Tigers work great.
TT46Pro on the sons Nexstar (0 min 38 sec)

#9 gr_yamms Oct 01, 2012 06:03 PM

jeffie that's a pretty convincing vid. haha.

What's the weight of that plane btw? And anyone have thoughts on gearing?

#10 aspeed Oct 01, 2012 06:44 PM

I wouldn't gear any glow motors. The prop and pitch are the gears. You could go like a 12-4" or 13"-4" for the same effect.

#11 jeffie8696 Oct 02, 2012 12:14 AM

This one is running an 11X6 MA 3 series prop with great results. Fuel is a 15% custom blended break in mix. Havent weighed the plane combo but its a little heavy in my opinion however the TT46 pulls it very nicely.

#12 iAlex Oct 02, 2012 05:42 PM

Jett doesn't list the power output on his website. When it comes to horsepower calculations of our small glow engines it is more a question of who can stretch the truth the best. But with the Jett he does say that with a 10x6 APC prop and powermaster 15% fuel a Sport Jett .46 will achieve 16,500 RPM. This is what I found with my .46. Using the same fuel and prop I was able to peak my engine at 16,500 RPM on the ground.

My Top Flight Contender is a blast to fly with this engine.

#13 jeffie8696 Oct 02, 2012 11:13 PM

Some day I will win the lottery and buy some Jett engines. Rich uncle maybe.
OK so I am a cheapskate.
Maybe I can talk them into sending me a test engine, it has happened before.LOL

#14 NACA0012 Oct 06, 2012 10:24 PM

Best performing? Under what conditions?

Things that work well on one plane, may suck on another.

#15 Mgblunt Oct 29, 2012 05:14 AM

I have two thunder tiger 046 and one OS and the thunder tiger engines out perform the OS and have held up well

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