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Modefo's RC Helicopters . XHELI.COM . Autography FlightPower

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Main Discussion > showing off
 
 
JEraptor
Senior Heliman
Location: Kankakee IL

Hi guys,
Check out my "homemade" muffler.
I did not like having to mount the chamber with those aluminum straps that the Hatori 2 paice came with AND the coupler leaking.

I had also read of the trend towards larger volume mufflers, so I made a "90 size" for my OS61WC.

It is a little noisy, sounds kind of like a CYMP but it seems to make good power.


Here is a pic of the Hatori 2 peice that was on it.








02-01-2002 Over year old.
 
 
slant911
Veteran
Location: Las Vegas, NV. Hirobo, Magnum Fuels, MAH

Link

No go on your link. Try again.
02-01-2002 Over year old.
HOMEPAGE  
 
 
Buzzin Brian
Elite Veteran
Location: College Station, Texas

Looks like, well what are the words? Oh yea I remember, A Muffler! Just kidding. I personally will save myself the time and frustration, and keep paying for mine. But that's just me!
02-01-2002 Over year old.
 
 
JEraptor
Senior Heliman
Location: Kankakee IL

muffler

I was anxoius to try my hand at TIG welding and not so anxious to spend $$$ on one muffler. My FLOWMASTERS were cheaper than a Hatori for goodness sake!!

You know the old saying,
"If you catch a fish for a man, you feed him for a day but if you teach him to fish, you feed him for a lifetime.".

I now know how to fish.
02-01-2002 Over year old.
 
 
Beezer
Veteran
Location: Ontario, Canada

TIG welding

So how did you like TIG welding? I've been wanting to try that myself for awhile but don't have access to the equipment.


Carl
02-01-2002 Over year old.
 
 
JEraptor
Senior Heliman
Location: Kankakee IL

TIG

I have determined that welding aluminum in general sucks, but I have welded aluminum many times before with a spoolgun and I know that I would never have been able to do as nice a job without the TIG.
The spool gun is MUCH faster, but not as controlable as the TIG.
The major benefiet of the TIG is that you can control the current while you are welding, if the peice is too hot, let off the pedal, too coldand you can poor on some more coal.


There is a problem with aluminum that is not there with other materials, it is explained here:
The pure metal has a melting point less than 1200ºF and does not exhibit the color changes before melting so characteristic of most metals. For this reason, aluminum does not tell you when it is hot or ready to melt. The oxide or "skin" that forms so rapidly on its surface has a melting point almost three times as high (3200º+F). To add to this confusion, aluminum even boils at a lower temperature (2880ºF) than this oxide melts. The oxide is also heavier than aluminum and, when melted, tends to sink or be trapped in the molten aluminum. For these reasons, it is easy to see why as much as possible of this oxide "skin" must be removed before welding. Luckily, the reverse polarity half of the AC arc does an outstanding job of cleaning off quantities of this oxide ahead of the weld!



The info above came from the following page:
http://www.lincolnelectric.com/know...ent/tigalum.asp


In conclusion, if I am welding something that is thick and/or doesn't have to look pretty I will MIG it but for thinner stuff and stuff I want to look good I will TIG.
02-01-2002 Over year old.
 
 
sodflyer
Veteran
Location: Frederick Colorado

mig welding alu

Also on that point I have used this method. When welding aluminum before you start....right before you start the ark use a new stainless steel brush to brush the soon to be welded area to rid it or break down the oxidiation. Do this each time....it does work! as we all know who has welded thin aluminum.........it's a pain in the arse! Jeff
02-01-2002 Over year old.
 
 
Beezer
Veteran
Location: Ontario, Canada

I have mig welded aluminum and it is a pain in the a$$. I have seen some beautiful aluminum welds and in every case it was done with TIG. TIG seems to require good right and left hand coordination which seems to be a challenge for me. Maybe when I have mastered the left and right sticks on my TX I will be ready to TIG weld. HEHEHEHE
02-01-2002 Over year old.
 
 
Scott_MT
Heliman
Location: Great Falls MT

Tig welding

Tig is like welding with a torch but you are using electricity to do the heating. If you think aluminum is bad try some magnesium. It starts melting like aluminum with a sag and if you don't watch it the thing bursts into flames and anly special chemicals are able to put it out. But it is way cool.
On another note. Mig welding is a direct short type welding, spray arcing is a mig welder using about twice as much current and 2% oxygen in the gas. This burns the wire before it touches the metal and shoots it into the parent metal. These are the welds on thick things that have a really long puddle, usually used in manufacturing processes.

Just my $0.02 from what I used to do for a living.

Thanks Scott S.
02-01-2002 Over year old.
 
 
sykochin
Senior Heliman
Location: GoWest

Jesus.... This must be an airplane guy!
Now your Xcell looks like you know what! Just kidding!
Keep the economy going... Spend your money out there, keep the good look of the xcell............
02-01-2002 Over year old.
 
 
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