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06-29-2014 08:56 PM  6 years ago
Topic Vote0Post 1
coolingfan

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Grand Junction, Colorado

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Century slim V2
I just had that exhaust tip come off and it went through my rotor disk and took a chunk out of one my main blades. Great now I need new blades. I thinking of not using it at all. Will it cause a power difference or just more noise? Sure don't want that to happen again!!
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06-30-2014 03:15 PM  6 years ago
geomecc

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Long Island ,NY

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mine came loose till I tightened it with a drop of lock tite and water pump plyrsR I P Roman Jr. Team SRW EFC
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06-30-2014 04:25 PM  6 years ago
RM3

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Killeen, Texas - USA

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Will it cause a power difference or just more noise?
the V2 exhaust tip is used to fine tune the engines output power...I experiemented alot with the the tip in place as well as with the additional washer and bolt that thread into the center of the inner "stinger"...

I found that for my engine (21.7 cc) the exhaust tip installed made approx 200 RPM difference (up from 11,900 to 12,100) while testing on the bench with a prop to determine maximum power. Without the tip in place the power dropped and yes it did increase the noise a bit.

I lost one out at the field and managed to find it, but after tighening it with slip joint pliers it never came off again.
showing a preference will only get you into trouble, 90% of everything is crap...
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07-01-2014 01:23 AM  6 years ago
petercp4e

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Oakham, Ma. USA

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I think RM3 is right on the money about the power and noise.
I filed 2 flat spots parallel to each other on the tip and use an adjustable wrench to tighten it. This doesnt cause any damage like the jaws of some pliers might.
Pete <:-}
Warning: Flying an RC helicopter is addictive and may become hazardous to your Wealth!
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07-01-2014 04:56 AM  6 years ago
coolingfan

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Grand Junction, Colorado

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Well mine is gone and I am positive I will not find it and the screw that goes in the stinger is also gone. When it fell off it damaged one my rotor blades. Must of happen with I was flying inverted. I can't think of any other orientation that would have caused it to get into the rotor disk. Anyways I am apprehensive about ordering a new one and installing it. I sure don't want to damage any more rotor blades. I believe I will try flying without it for now. I was looking on heli world website at this muffler tip. Will this work on the century slim torpedo v2? You will need to copy and paste link in browser!

http://www.heli-world.com/century-r...er-cn3068a.html
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07-01-2014 06:44 AM  6 years ago
rbort

rrProfessor

Franklin, MA - USA

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What engine do you have?
For a smaller engine the tip is OK to use but when you get into the larger engines, for example the Hanson 300 the exhaust tip has to be removed otherwise the engine will lose 40 rpms on the top end (40 rpms on the head not the motor itself).

The one you showed in the link appears to be the wrong one. I think what you had before was a screw in type - at least that's what my V2 takes.

-=>Raja.
MA 1005 Hanson 2703D, 4452 flts
Spectra 27 3DMax, 3484 flts
Whiplash V1-2 Hanson 300, 2071 flts
Whiplash V2 Hanson 300, 954 flts
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07-03-2014 02:07 AM  6 years ago
coolingfan

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Grand Junction, Colorado

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bh hanson 270 3d max
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07-03-2014 03:49 AM  6 years ago
rbort

rrProfessor

Franklin, MA - USA

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Tip
I'm using it on my Hanson 270 3D max motor in my Spectra. On the whiplash I took it off as its the Hanson 300 and needed to breath more.

-=>Raja.
MA 1005 Hanson 2703D, 4452 flts
Spectra 27 3DMax, 3484 flts
Whiplash V1-2 Hanson 300, 2071 flts
Whiplash V2 Hanson 300, 954 flts
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07-03-2014 04:52 AM  6 years ago
coolingfan

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Grand Junction, Colorado

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Does it screw in like the stock tip does? Or is it just held in by the side allen screws?
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07-03-2014 05:01 AM  6 years ago
coolingfan

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Grand Junction, Colorado

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I just read your early post. The original one screw in. But I don't think blue loctite will keep it in. What will work to keep it from loosing up? Maybe some jb weld. I think I will just fly without it and see how much power I loose or not. I might go out early in the morning and fly. Since my boss gave me the day off paid.
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07-03-2014 09:42 AM  6 years ago
Gumbomb

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Northwest England, UK

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I use Blue Threadlock and have never had a problem - just make sure you thorouighly degrease the threads before applying the threadlocking compound ( and allow to dry before use!)My gasser might not be light but it can fly better than I can fly it
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07-03-2014 01:37 PM  6 years ago
coolingfan

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Grand Junction, Colorado

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Interesting stuff. That exactly what I had done previously and ran 4 gallons of fuel through it without a incident. What about the hex screw that goes in the stinger. How do you keep it in. I also used blue thread lock on it. But it also came out. Maybe use some red loctite on it. I know the muffler is tunable. But why not make a muffler that is already tune for the engine. I know it was probably one in a million shot that the tip would come off again and go through the rotor disk! I always thought crashing was the only way to trash a good set of rotor blades. Not any more!! LOL Thanks guys for all the good advice and info. I will probably order some replacement tips!
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07-03-2014 02:51 PM  6 years ago
coolingfan

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Grand Junction, Colorado

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Well doesn't look like I will be ordering any of those tips. Website says "out of stock" Sounds about right. Well I am heading to field this morning! See how it does without it!
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07-03-2014 07:22 PM  6 years ago
rhodesengr

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Pleasanton, CA USA

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try BH hanson. They sell the V2 pipe so perhaps they have the accessories.
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07-03-2014 08:59 PM  6 years ago
RM3

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Killeen, Texas - USA

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But why not make a muffler that is already tune for the engine
that would not be feasible...the V2 fits Zenoahs from the small 20cc on up to the 29cc engine...there are at least 5 other displacements in between or more, THEN each engine is tuned based on how its used in the heli, which will change with things like pinion size, blade size, carb choice and head speed.

you could easily end up with over 700 different combinations that each would work best with only one "perfect" tuned exhaust.

So our helis are gatherings of parts that each have engineering compromises to make it affordable and feasible.
showing a preference will only get you into trouble, 90% of everything is crap...
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07-04-2014 04:15 AM  6 years ago
coolingfan

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Grand Junction, Colorado

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Bh Hanson is no longer carrying that muffler. I flew today without it and it isn't going to work. I couldn't get the engine tune correctly. Just didn't seem have the same power it had. And Century is showing it is out of stock. So I guess I am back to flying my Trex 550 until the parts are available again.
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07-04-2014 05:20 AM  6 years ago
Gearhead

rrMaster

Vt

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simple; just buy a bolt that will fit the treads and have some one drill it out and shorten it on a lathe, then use high temp locktiteJim
Buzz Buzz Buzz
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07-04-2014 12:14 PM  6 years ago
fastflyer20

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N. Tonawanda, NY

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You should be able to get it to run fine without the tip. With the needles properly set, it helps the power output. Without the tip, the sound changes so you have to listen to the change and tune accordingly.Tom
CAUTION - my posts are based on my experiences, yours may be different.
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07-04-2014 03:39 PM  6 years ago
rbort

rrProfessor

Franklin, MA - USA

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If you want a tip let me know
I took one off mine when I upgraded to the 300 motor while testing to see the difference. Its a little ovaled hole as I squeezed it with the ball link plyers to remove while hot and the aluminum was soft at the time but its still usable I can ship to you let me know.

-=>Raja.
MA 1005 Hanson 2703D, 4452 flts
Spectra 27 3DMax, 3484 flts
Whiplash V1-2 Hanson 300, 2071 flts
Whiplash V2 Hanson 300, 954 flts
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07-04-2014 03:41 PM  6 years ago
RM3

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Killeen, Texas - USA

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I agree, you should be able to tune it, without the tip the power band has just moved slightly higher...so to get it to work without the tip in in place you may need to increase the engine RPMs (or HS) to match the change in exhaust backpressure, then adjust the needles a bit to bring it in line. The change should probably be about 200 rpms (maybe more) on the HS is my guess...showing a preference will only get you into trouble, 90% of everything is crap...
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