Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

Evo 40 17 500rpm, possible?

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Old 06-15-2007, 05:44 PM
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Default Evo 40 17 500rpm, possible?

Hi

What would you guys think abotu one of these engines- http://www.horizonhobby.com/Products...rodID=EVOE0400

yes its very low cost its rated for 16.4K rpm stock throw on a tuned pip 17.5K should be in sight i ahve one turning a 10x6 stock muffler at a bit over 14.6K ...

Can it be done? Would it last?

Please put in your opinions (i do know it wont turn like a nelson or JETT but maybe a low cost alternative?)

Steven
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Old 06-16-2007, 11:29 AM
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Default RE: Evo 40 17 500rpm, possible?

anyone[&:]?
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Old 06-16-2007, 11:52 AM
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Default RE: Evo 40 17 500rpm, possible?

The lack of responses most likely reflects the amount of popularity this engine has here. I've never seen a EVO .40, but I'm positive it could spin a popsickle stick 17,500 . You need to complete the question with whatever prop you have in mind. I can go out on a limb and say that most any half decent .40 can turn a 8x6 about 18,000 with open exhaust.
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Old 06-16-2007, 12:09 PM
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Default RE: Evo 40 17 500rpm, possible?

Well i was thinkign somthign like an 8x8 for somthign like a viper it was just amazed by the numbers i was getting and the term "evo" i was reffering to horizen hobby's "Evolution" line of engines which are extremly cheap (in cost)....

Sorry for any confusion
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Old 06-16-2007, 10:52 PM
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Default RE: Evo 40 17 500rpm, possible?

You might have discovered a cheap way to go pretty fast! The big question is always about longevity and I think it is a good idea to add 2 ozs of castor oil to every quart of store bought fuel. I will bet that the stock carb will keep this engine from reaching its' potential, think about using a venturi if you want to see what this engine can do.
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Old 06-17-2007, 05:34 AM
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Default RE: Evo 40 17 500rpm, possible?

It might do it with a 9x6 and a pipe...

I don't have the .40 but I have a .455 Alpha trainer engine that I mod. a bit and it will turn an APC 12X4 at around 14,000 on 15% on a good day. (I saw 14,200 on a nice, crisp fall day last year )

My Evo .46NT (again, slightly mod. ) will turn an APC 10X7 at 13,500 (+or- a few ) on 15%, on a good day...(cool/dry air )

Both are using the Tower muffler.

The ports on the outside of the sleeve have been cleaned up and a "Turbo" cut in the crank similar to what most r/c car engines are using.

They are fairly well built engines...strong crank and rod, and have a true ABC sleeve.
The only thing I don't like are the cheap bearings.
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Old 06-17-2007, 11:22 AM
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Default RE: Evo 40 17 500rpm, possible?


ORIGINAL: proptop

I don't have the .40 but I have a .455 Alpha trainer engine that I mod. a bit and it will turn an APC 12X4 at around 14,000 on 15% on a good day. (I saw 14,200 on a nice, crisp fall day last year )

WEll you Have found a huge problem in my thinking! i was told (byt the LHS owener that sold it to me ) the engine on my trainer (alpha 40) was a .40 but you are right its a .45

Sorry...
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Old 06-17-2007, 12:40 PM
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Default RE: Evo 40 17 500rpm, possible?

Well...I also have heard that it could be a .40, but as I recall when they were introduced that they were/are only fractionally different (smaller ) than the .46...so...

If you go by the Bore and Stroke measurements, then the Alpha trainer engines is no .40...

No worries

Edit: I'll tell ya though...the Alpha seems a little more of a revver than the .46NT.
If you have the .455 then maybe a 9X7 or 10X6 would be more like it?

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Old 06-17-2007, 12:50 PM
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Default RE: Evo 40 17 500rpm, possible?


ORIGINAL: proptop

Well...I also have heard that it could be a .40, but as I recall when they were introduced that they were/are only fractionally different (smaller ) than the .46...so...

If you go by the Bore and Stroke measurements, then the Alpha trainer engines is no .40...

No worries

Edit: I'll tell ya though...the Alpha seems a little more of a revver than the .46NT.
If you have the .455 then maybe a 9X7 or 10X6 would be more like it?

Yep 10x6 14 400 rpm stock everything os #8 glow plug with power master 15% "sport" fuel stock muffler

Thats what led me to thinking that maybe it could be an alternative... can we get thise engine without the trainer attached to it?
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Old 06-17-2007, 01:13 PM
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Default RE: Evo 40 17 500rpm, possible?

can we get thise engine without the trainer attached to it?
Wait till they solo!
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Old 06-17-2007, 05:49 PM
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Default RE: Evo 40 17 500rpm, possible?


ORIGINAL: HighPlains

can we get thise engine without the trainer attached to it?
Wait till they solo!

And it might even still run!?

The Alpha trainer system has a special part # but I don't recall exactly what it is?
I think it's called the TPS (for Trainer Power System ) and the # is EVO100 or something like that? (Horizon's search function sucks, so good luck )
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Old 06-18-2007, 06:51 AM
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Default RE: Evo 40 17 500rpm, possible?

proptop, You were correct it is called the "Evolution Trainer Power System" and here is a link to it http://www.horizonhobby.com/Products...ProdID=EVOE100 80$ USD doesnt seems like that bad a deal if it can stand up to the rpms...
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Old 06-18-2007, 10:36 AM
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Default RE: Evo 40 17 500rpm, possible?

Why not just go with the thundertiger pro 40 that is tried and proven to run great for maybe 5 bucks more?
get it with a discount from tower and might be cheaper than the Evo.
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Old 06-18-2007, 01:10 PM
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Default RE: Evo 40 17 500rpm, possible?

I have not run a ".40" for YEARS since the 45-50 class is almost the same weight as most .40's

The TT is a Great engine, the TT-42 is actually pretty strong but for the money the TT Pro-46 is best of breed IMHO-

I always see good deals on used MVVS and Rossi-40 engines also
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Old 06-18-2007, 01:19 PM
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Default RE: Evo 40 17 500rpm, possible?

I agree id probably go for the thunder tiger if i had to buy one, but at the end of the day what it comes down to is i ahd this engine in a trainer that i (almost) never use and im sure there are some in the same category this this is maybe somthing that could be of interest to them
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Old 06-18-2007, 01:50 PM
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Default RE: Evo 40 17 500rpm, possible?

The TT .40 will turn a 9x6 APC prop at a little over 17,000 after break in.

About 120 with a standard Quickie airframe if around 3 lbs 12 oz.
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Old 06-18-2007, 05:10 PM
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Default RE: Evo 40 17 500rpm, possible?


ORIGINAL: daven

The TT .40 will turn a 9x6 APC prop at a little over 17,000 after break in.

About 120 with a standard Quickie airframe if around 3 lbs 12 oz.
Really? I have about 6 tanks through mine, Bone stock on a viper. Turns an APC 9x6 about 16k even. Will they gain 1000rpm after full break in?
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Old 06-18-2007, 08:25 PM
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Default RE: Evo 40 17 500rpm, possible?

They should, I only own one, and it does. I use Powermaster 15%

Depending on your prop, pressure, humidity, and temp, your results may vary.

I would also suggest breaking in the motor on the fuel you intend to run (15%)
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Old 06-19-2007, 12:07 PM
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Default RE: Evo 40 17 500rpm, possible?

My two best TT40 engines turn the 9x6 16,500 - perhaps 16,700 on a good day. Box stock, stock muffler - except for 4 screws. Only tool to touch it is an allen wrench, screws replaced are for the backplate so they are long enough for the firewall engine mount.

Ive seen posts of guys getting 17K+ from the engines .... beats me how they do it.

(note... I can get one to run at 17K plus, but it is no longer box stock - perhaps 'technically' stock by some rules, but not box stock)

I've not seen much more out of a bone stock engine. I launch them at about 16K even, but rarly tach them on the line.

As for the Evo....

I received an email from someone the other day. His club was running a sport race, he was asking about using the jett muffler on his TT40 to gain some performance ---- apparently the Viper/TT40 (stock) was being lapped by an Evo .46 powered plane (no details on 'that' plane) using an ultrathrust muffler. Apperently they were allowed to swap mufflers

(editors note here.... allowing anything other than 'stock' or 'factory' (or any variable) for club or sport racing is just plain dumb... always leads to problems, hard feelings or someone interpreting the rules differently)

Obviously there are lots of variables involved here, but I believe the information shows that at least 'notible' performance can come from the Evo engines with the right setup.
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Old 06-19-2007, 12:57 PM
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Default RE: Evo 40 17 500rpm, possible?

A 46 WITH a UT muffler? The displacement is not even the same, what kind of club is this??
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Old 06-19-2007, 01:34 PM
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Default RE: Evo 40 17 500rpm, possible?

Try several different APC 9x6 props, and remove the flashing that runs around the edges of the blade (both LE and TE). I see a variance of nearly 500 rpm between the 6 props I "prepared" for racing. Personally, I think your better off with the slightly higher pitched 9x6 blades as opposed to light pitched ones.

Also, if you don't mind not having an idle, you can leggaly unscrew the low speed needle till its nearly falling out. Than fill in the depression that holds the screw in place with JB Weld, or high temp epoxy paste. This is 424 legal, read the rules. Make sure everything is perfectly clean before gluing, or it won't hold.

You also should remove the barrel retaining spring in there before gluing up, it has been known to fail and get injested into the motor.

I've only bought one motor, and after close to a gallon of fuel on the bench, it tached slightly over 17k.
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Old 06-19-2007, 01:55 PM
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Default RE: Evo 40 17 500rpm, possible?


ORIGINAL: Razor-RCU

A 46 WITH a UT muffler? The displacement is not even the same, what kind of club is this??
its club sport racing...... anything goes pretty much.... i guess

run-what-ya-brung
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Old 06-19-2007, 02:06 PM
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Default RE: Evo 40 17 500rpm, possible?

Thanks Dave......

Yep, I do the idle screw stuff usually. Depends on who the engine is for, and if it is expected to idle (some club racing rules require an idle check).

And yes, the props vary by up to 300 rpm from what I have seen. In fact I have one remaining "old" APC 9x6 that is 400 rpm better still than anything out there today.

Given a choice, yes, I like the heavier props.... usually drags rpm down to the 16,400-500 range if ya got a real good one.

But where I have raced most recently - props are issued (I rather like this format, same as done 30 years ago), you can not touch the props. Props are provided - you pick from the basket at registration time - props are marked/painted. So it sorta depends on who prepaired the props, if they did anything other than mark/paint the hub.

So far Ive prepared 13 of the TT40 pro engines for myself and a couple of others. Hard to beat these things for the money. And for that type of 424 racing, worrying about 100-200 rpm here or there is a waste of time
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Old 06-23-2007, 07:45 PM
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Default RE: Evo 40 17 500rpm, possible?

do you guys recommend the TT 40 over the TT 46 for speed?
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Old 06-23-2007, 10:28 PM
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Default RE: Evo 40 17 500rpm, possible?

Depends on your intentions, most areas only allow the .40 for racing, if you looking for fun "sport" speed, the .46 will be faster.
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