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HomeAircraftHelicopterHIROBOOther › EVO 50 Tail grips
02-06-2006 06:00 AM  12 years agoPost 1
The_Widowmaker

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Bear Valley Springs, CA

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Someone please tell me what I'm doing wrong. My EVO 50 is complete and during final check I noticed substantial play from left to right between the tail rotor blade grips and the spindle. I assembled per the instructions..

From hub out to tip of spindle.

Greased Thrust Washer assembly
Small spacer washer
Bearing
Nylon Nut

I put the blade grip halfs together on above and screw halves together. The two halves are clearly seated together but the play is still present.

In case I am not being clear, stand behind the heli with the tail rotor at 0 pitch. Grab either blade and rock left and right. The entire grip assemble is moving somewhat freely around the spindle. I'm afraid to take it up this way so help if you can.

"I'm a Virgin.. I'm just not very good at it. "

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02-06-2006 06:01 AM  12 years agoPost 2
spritefiend

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Camarillo, CA

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normal.

as i understand it, they tighten up tigther than a... when they spin up.

edit: i believe the only way to eliminate that is upgrade to the freya tail

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02-06-2006 06:10 AM  12 years agoPost 3
The_Widowmaker

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Bear Valley Springs, CA

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Thats a real let down for such a highly regarded kit. Used raptors with tails very similar in design are better than that.

"I'm a Virgin.. I'm just not very good at it. "

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02-06-2006 06:14 AM  12 years agoPost 4
spritefiend

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Camarillo, CA

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let me see if i can find a better explaination of it. i think it also has to do with the thrust bearings in the tail grip.

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02-06-2006 06:16 AM  12 years agoPost 5
The_Widowmaker

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Bear Valley Springs, CA

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With that much slack, going from - to + pitch it seems that would really take its toll on the grip halves and the spindle. Wonder if the raptor tail will fit.

"I'm a Virgin.. I'm just not very good at it. "

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02-06-2006 06:18 AM  12 years agoPost 6
spritefiend

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Camarillo, CA

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http://www.runryder.com/t211697p1/
http://www.runryder.com/t210058p1/
http://www.runryder.com/t199327p1/

search "tail slop" and you will find several refrences to it, these are the first 3 that i found within the first couple of pages of results.

to my limited knowledge there have been no incidents where the blade grip movement was responsible.

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02-06-2006 06:30 AM  12 years agoPost 7
The_Widowmaker

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Bear Valley Springs, CA

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Thanks for the info spritefiend. So the freya tail does not do this?

"I'm a Virgin.. I'm just not very good at it. "

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02-06-2006 06:39 AM  12 years agoPost 8
Jeeum

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Orange County,NY

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Funny, I've got 7 flights now on my Evo and never even noticed it till I read this post. Mine does have it as I see it is perfectley normal. I'll say this, my tail seems very solid and locked in with a great piro rate, so I'd have to agree with the guys in the other posts. It just doesn't matter.

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02-06-2006 07:04 AM  12 years agoPost 9
MEDFLIGHT

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South Webster, Ohio

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I'll take an Evo 50 with slop in the tail over a Raptor with no slop any day. Just sold my Rappy today. Still have a Freya Evo 90, Freya 60, and Evo 50.

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02-06-2006 11:51 AM  12 years agoPost 10
GURUMODS

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Poughkeepsie,New York

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Don't panic,it is perfectly normal.At the tip of the tail blade you will notice about 1/2 -3/4 inch play.It is because of the thrust bearings used.

Hooters in gallery

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02-06-2006 12:10 PM  12 years agoPost 11
dgshaffer

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New Jersey

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It's not "Slop". It's built in teetering just like on the head of any heli. The EVO flies like an animal as is and does NOT need the Freya tail grip upgrade.

Once you're done assembling the kit fly it with the "Sloppy" blade grips and see if you think it has ineffective tail control.

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02-06-2006 01:01 PM  12 years agoPost 12
Ken B

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Phoenix, AZ

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Yep, another vote for DON'T SWEAT IT. This is normal. Well as long as you installed the thrust bearings correct. If you did them backwards the tail will be even more loose.

Now think about it those tail blades spin at 3000-4000 PRM rough guess. The centrifigal force on the thrust bearings cause them to stiffen up.

YEa the Freya tail is nice but not needed. I've been flying my Sceadu/Evo with the stock tail since they came out. Never had a problem...

Ken B

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02-06-2006 02:15 PM  12 years agoPost 13
Eury

rrProfessor

Dover NH

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Same here, don't worry about it, they are designed that way, the tail has plenty of authority stock. You are right that the Raptors don't do it, it's because they are a poor design that lacks thrust bearings.

Nick Crego

Citizen #0168

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02-06-2006 02:58 PM  12 years agoPost 14
Four Stroker

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Atlanta

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eurylokhos gets the gold star. Lots of people don't know what thrust bearings are or how they work. The original Concept 30 had only one thrust bearing. Early XCells had one thrust and one radial. Heli's that have two radials and one thrust are for marketing - so that people don't complain about the slop.

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02-06-2006 03:10 PM  12 years agoPost 15
tracker640

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Cedar Park, TX

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Normal
I own an evo and have seen no problems with the the tail holding. "If it ain't broke don't fix it"

Vince'

--"Flying is for The Birds"--
--“Rave ENV-N FBL, Hirobo EVO 90

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02-06-2006 05:33 PM  12 years agoPost 16
George Matthews

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N.W. Ohio

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It isn't a problem. I have 50 gallons through my evo 50 and the tail grips are just fine.

George Matthews

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02-06-2006 05:50 PM  12 years agoPost 17
Salty

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St. Augustine

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4 EVO 50's here with all stock tails and no problems...

Ask your Doctor if getting off your ass is right for you.

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02-06-2006 11:04 PM  12 years agoPost 18
pilotoo

rrNovice

ohio

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I have to agree with everyone else. The wobble freaked me out at first, but the heli flies just fine. I would trust the designers on this one. Maybe this is a bad analogy, but think of buildings in california; If they were built not to have play in the foundation they would break apart when a strong earthquake hits.

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02-06-2006 11:12 PM  12 years agoPost 19
traderdave2

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Covington, GA

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Widowmaker,

You probably put it together correctly. The play is normal. The tail will be very solid in the air. Fly it and then come back and tell us how it did.

Harlan

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