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HelicopterGasser Model RC HelicoptersOther › Spectra Gasket/Threadlock Question
10-09-2013 09:45 AM  4 years agoPost 21
Azalin

rrApprentice

Ankara-Turkey

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The red gasket that specifically made for automotive use is the best for me. It is very heat resistant.

Helibug Trex 700 HB7-RC Gasser | TRM VX270TT | V-Bar silver line
Helibug Trex 600 HB6-RC7 Gasser

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10-09-2013 08:05 PM  4 years agoPost 22
RM3

rrElite Veteran

Killeen, Texas - USA

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One particular note on using any sealant for the exhuast that I experienced... You have to follow directions on the product, apply a thin layer, then assemble, then let set for specific amount of time (12 hrs), then torque the bolts down further.

of the few guys I meet at the field with gassers, alot of them just apply the sealant, and then torque the whole thing tight...this ended up just allowing the sealant to squeeze into the exhaust port opening and causing problems, especially with tuned pipes (found sealant bits in the plug).

another thing is like what happened to me, the V2 muffler was no longer solid to the engine but rather allowed the muffler to have some give...this caused vibration issues that lead to a failure within the V2 where the little "stinger muffler" that can be seen from the tip broke off inside. Lesson learned to use a rear muffler support especially when using a sealant that allows the attached item to wiggle even a tiny tiny bit.

whats worked for me is to cut a shallow groove where the sealant can hold onto and avoid being squeezed out. I did this with a header extenstion BTW.

showing a preference will only get you into trouble, 90% of everything is crap...

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10-09-2013 08:45 PM  4 years agoPost 23
Kos

rrApprentice

Athens, Greece

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whats worked for me is to cut a shallow groove where the sealant can hold onto and avoid being squeezed out. I did this with a header extenstion BTW.
very interesting, a photo would be very useful...i use to slightly roughen the surfaces with sandpaper or the dremel and i have found that the imperfections/scratches act similarly to the groove, trapping the sealant within...

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10-10-2013 01:54 PM  4 years agoPost 24
Brett

rrVeteran

Chicago Burbs

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What kind of rear muffler support. I'm not aware of any sold, has anyone made one?

I simply put the sealant on thin, let it film up a tad and tightened. If you don't go crazy with it you should have very little in the port but I don't think you can stop that 100 percent. I'm sure it will just end up in the muffler but you could always pull the head off and check. If you let fully dry before assembly I doubt you get a good seal and be more prone to movement between surfaces.

Thoughts?

If you can't do it right Don't do it!

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10-15-2013 03:37 AM  4 years agoPost 25
turboomni

rrProfessor

East of the Equator

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Dry muffler bolt threads and after the first run ,,tighten when hot.

Setup is everything, All my heli's can fly far better than I can pilot them

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10-15-2013 03:46 AM  4 years agoPost 26
turboomni

rrProfessor

East of the Equator

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A few years back I crashed a Spectra G due to radio lockout I suspect was the result of the Hatori muffler coming loose.
Why do you suspect that? were you on 72 mghz?

Setup is everything, All my heli's can fly far better than I can pilot them

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10-27-2013 01:11 PM  4 years agoPost 27
Brett

rrVeteran

Chicago Burbs

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During flight I was locked out when it went out of control and on inspection the muffler was loose but undamaged from crash so it was apparent metal to metal caused interference. Yes it was 72.

If you can't do it right Don't do it!

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10-27-2013 03:42 PM  4 years agoPost 28
turboomni

rrProfessor

East of the Equator

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Bummer,,I remember runnng my first gasser with 72 and getting glitches which was VERY Worrisome. You using any ferrite rings?
I remember that helped me a bit when I was on 72.

Setup is everything, All my heli's can fly far better than I can pilot them

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10-27-2013 03:51 PM  4 years agoPost 29
rbort

rrProfessor

Franklin, MA - USA

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Was it PCM or PPM?
72Mhz on PCM is pretty good, I used it for years with the gasser. 72Mhz PPM of "FM" was more problematic, would glitch and shake all servos and you needed to jump through some hoops to make it work, but it was never bullet proof. I remember some people also using metal shielded plug caps, I never had to do that with my helis which flew 72Mhz from September of 1997 until January of 2012.

-=>Raja.

MA 1005 Hanson 280, 4187 flts
Spectra 27 3DMax, 3252 flts
Whiplash V1-2 Hanson 300, 1503 flts
Whiplash V2 Hanson 300, 353 flts

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HelicopterGasser Model RC HelicoptersOther › Spectra Gasket/Threadlock Question
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