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02-09-2006 11:21 PM  12 years agoPost 1
hootowl

rrProfessor

Garnet Valley, Pa.

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During my first flight after doing my latest mods... new swash, tail, Maverik G4 blades, I was experiencing a shake in hover. Not a vibration but a shaking of the airframe. It wasn't constant or consistant.

Brought her home that evening unusually in one piece

Last night a gave her the once over.

1) Blades were a piece of irridescent tape off balance. Not enough the be the cause of this I don't believe.

2) I had a couple of links on the swash that were pretty tight. I took an old 3mm threaded ball, gouged it up slightly with the teeth of a pair of pliers, screwed it onto a long aluminum frame spacer and used it as a link cutter. Worked great. Got the idea on here somewhere. Got all the links to feel about the same.

3) THE BIGGY.... Throttle servo mounting screw was falling out and the others were loose. The throttle servo was loose as a goose. I believe this was the real problem. One of the plastic servo mounting bosses was stripped. I had a heck of a time getting the assy to snug up. I ended up putting a couple of washers behind the frame, between the boss and the frame to shorten up the standoffs. Then I found better screws that were longer and had more bite. That worked but I really need some new bosses. I haven't figured out how they work, what the addendum change was and the difference between the instructions in the manual saying not to glue and the instructions in the addendum saying to glue them in place. I think a better way would be to take one of those small aluminum servo plates and thread long screws in them, essentially making a boss with threaded studs. Then I can mount the servos with nuts.


Flew today....... the shake is gone!

Loose servo must have been playing with engine rpms.

Got her home in one piece. I'm learning the hard way how to prepare for a fly. I wanted to fly a second tank but my portable starter ran out of juice. I didn't have the power cord to run it from the field battery so I packed up and came home

In one piece again! This is awesome not having to rebuild after every flight due to my lack of flying experience. Had a bit of wind so I got some good practice fighting the lifts and side drafts.

Wolves don't lose sleep over the opinions of sheep

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02-09-2006 11:40 PM  12 years agoPost 2
Herc

rrKey Veteran

Cranbrook, BC - Canada

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Hey Hoot,

Glad to hear you got your shakes under control. lol I've been getting into the habit of checking just about every visible screw when I get home from the field before I go out again. Takes just a few minutes and usually nothing is found. I think cleaning really helps too because you get a good look at everything.

It's sure a nice feeling not rebuilding all the time isn't it? I've got two gallons through my Tiger now, with the last 1/2 gallon doing FF and nose in. Everything is so nice and smooth. This weekend I hope to tweak some of my curves a bit and get my headspeed where I want it so that my cyclic is more responsive. Going to switch to unweighted paddles to make it a bit more responsive. She's a bit sluggish right now.

Twenty minutes and I'm off to get a few flights in before sunset. Gotta love the longer days starting. Hopefully the temperature holds out. We're only supposed to get down to -9 this weekend, and sunny.

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02-09-2006 11:53 PM  12 years agoPost 3
B.Hofferth

rrApprentice

walkerton in.

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blades
hey hoot glad you found the problem. i see that you are using maverikk g4's are they the pros? im curious to know how the 600's (if that is what you are using) fly? i went through may a set of 550 maverikk g4 pros on my venture when i was practicing moves. i always thought that they were the most responsive and best autorotating blades for the money that i could find in a carbon. unfortunately they had a flutter/tracking problem from time to time at the high head speeds that i ran and still run. im thinking that i will try the 600s for my tiger when i dork it again someday. that is if you like them. brian

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02-10-2006 12:01 AM  12 years agoPost 4
hootowl

rrProfessor

Garnet Valley, Pa.

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Yes they are the Pro blades. I'm not qualified to judge blades yet. So far they track perfect.

Wolves don't lose sleep over the opinions of sheep

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02-10-2006 12:21 AM  12 years agoPost 5
B.Hofferth

rrApprentice

walkerton in.

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if you had it in the air and set it back on earth in one piece then you are qualified! thanks for the info. brian

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02-10-2006 12:42 AM  12 years agoPost 6
hootowl

rrProfessor

Garnet Valley, Pa.

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Hey there's nothing like having the confidence now to give her collective right off the ground without pussyfootin. Nice not having my heart pounding out of my chest at least just puttering around.

Wolves don't lose sleep over the opinions of sheep

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02-10-2006 08:25 PM  12 years agoPost 7
jvanscoyk

rrVeteran

Tucson, AZ

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The last time I had my Tiger apart I put a dab of GE Silicone Glue under the mounting ears of the servos between the side frames and the servo. The servos won't budge at all now. The beauty of this is if I strip out a boss it is not glued in and can be replaced easily. The servos can be removed easily as well.

Jim

must go faster, must go faster.........

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