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HomeAircraftHelicopterSynergy R/CSynergy N7 News  N7 turbine
01-25-2015 08:07 PM  3 years agoPost 81
Dan MinickrrKey Veteran - Columbus, WI - My Posts: All  Forum  Topic

well today I tore apart my expensive roto tank. Yes, it ruined the internals but it didn't work anyways. I think I spotted, another, part of the problem. Despite talking to the (only) seller of these tanks over the phone he apparently misunderstood what I was asking or just guessed. The o-rings (blue) inside the brass pickup swivel had swollen so bad the clunk could no longer rotate. The kero ruined the tank.

Moving forward I have two different felt clunks and an Os bubbleless. Any problems with felt and kero? Also two different diameter tygon lines. The smaller line is still larger id than the brass tube was so I am not worried about delivery problems. The advantage of the smaller line is that it can fall back towards the stopper side of the tank if necessary. Also do you think I should cut it normal length towards the back of the tank, or cut it so the clunk ends between 1/2 and 3/4 of the way across?



Team Synergy, Team FBL Rotors-------if its not broke...it will be!

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01-26-2015 04:33 PM  3 years agoPost 82
Mark Dean

rrApprentice

Maryland

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Suggestions
I was talking to a few of my turbine running friends and they agree that the felt clunk is just fine. Now for your tubing, the suggestion was to use Hayes tubing because it is so thin and flexible. Here is the link(http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXK824)It is gas and kero safe. If you use this, you can go almost to the end of the tank with your clunk because it is limber enough to slide all over the tank. Do not use ties on the ends of it though, as it will tear. The recommendation is to use another small piece of the tubing over the ends. I have run this tubing in my nitros and gassers with great results, along with a felt clunk. Seeing how the guys say its kero safe I would think you will have equal results. If you continue to use tygon I would suggest that you shorten the clunk line and try to maximize use in the middle of the tank bottom. The design of that tank doesn't yield any great place for the clunk.

Mark

Team Synergy Field Representative, Rail Blades, Scorpion Power Systems

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01-29-2015 01:28 AM  3 years agoPost 83
Dan MinickrrKey Veteran - Columbus, WI - My Posts: All  Forum  Topic

Thanks for the suggestion, I have had the black line before and was not a huge fan. That being said its not out of the question if i can not get real Tygon to work the way I need it to.

Here is what I am testing now. I used the smaller diameter Tygon, an OS bubbless clunk, and a starter shaft adapter. If you look closely I ran the wire holding the clunk on up through where the set screw would go so it can not slide back up the tube. These combined give me a "clunk" weight of 16.5 grams. I stuck it together and filled the tank full of kero. I am going to give it a couple days sitting in the shop loosely then tip it every which way and see if I can get the tubing to kink. If not, time for a test flight.

Team Synergy, Team FBL Rotors-------if its not broke...it will be!

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03-12-2015 03:42 AM  3 years agoPost 84
Dan Minick

rrKey Veteran

Columbus, WI

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Just an update, I finally had a chance to fly the machine again with my new clunk setup. Works like a charm. Timer set for 4 min flights. Looking forward to getting some time on it now before spring planting begins.

Team Synergy, Team FBL Rotors-------if its not broke...it will be!

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03-14-2015 03:11 PM  3 years agoPost 85
Jim Cimino

rrKey Veteran

NE Pennsylvania

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Great news Dan, I am slowly moving ahead with mine and have also started a Whiplash conversion.

Team Synergy, Team Scorpion, No good deed goes unpunished

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