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Home › ✈️Aircraft › 🚁Helicopter › e-Thunder Tiger › Raptor E620 › Tail having a hard time holding.
05-28-2007 12:13 AM  13 years ago
Topic Vote0Post 1
litespeed600

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St. Charles, Missouri

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Tail having a hard time holding.
One thing is I'm running a lower head speed right now due to the lower KV of this Z50A-600 (565kv) comming from my Orbit 30-12 which had a KV of 650. Head speed dropped from 2100 to 1850 on 10s2p a123 batteries. As soon as the 14 tooth pinion comes in it will be back up to the 2100 range but the tail has never held like my Swift but I just always figured it was from the control rod and from the larger physical size (bigger = slower?). Since I keep growing with my e620 I'm starting to loose the tail occasionally now. This is an event for me since I'm concentrating so hard doing what I'm trying to master. Right now I'm running a 401/9254 and stock tail blades. The gyro is set to about 60 delay.

It's nerve racking to say the least!

My two options to try as I see it are
1) Tail mount servo
2) Better tail blades or longer ones

If you have other ideas on what it could be or things I could try let me know.

If you think one or the ohter would help make sure to include a link or a place where the item could be bought.

TomMarried with 2 kids, I am no stranger to pain!
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05-28-2007 12:32 AM  13 years ago
0Post 2
llamatrails

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Gainesville GA - USA

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Interesting. I'm running the 10t on mine, and getting a head speed of 2290, with the Z50A-600 and 10s2p a123. I've extended the boom, and have 710 mains.

My plan is to change to the 9t to lower it. No. I don't intend to do 3D, just boring, level flying about with a camera hanging off of it.TIA,
Rick
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05-28-2007 12:45 AM  13 years ago
0Post 3
litespeed600

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St. Charles, Missouri

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If your headspeed is that high I would think you have the Z50A-800 not the 600. You can check it out here,

http://www.dacsa.net/heli/Calculator/default.aspx

The main gear is 111. unless you are running a conversion frame using the 95 main gear???

I just checked that wouldn't do it so no clue here.

TomMarried with 2 kids, I am no stranger to pain!
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05-28-2007 05:12 AM  13 years ago
0Post 4
KevinR

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Vancouver, BC Canada

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Try some CF 95mm tail blades and see if that helps, they should give a little more tail power than the stock ones.

Also, although the 401 is a great gyro I'm not sure how well it holds in fast backward flight. I know the one on my T-Rex 450 will blow out every now and then but the 611 in my e620 seems to be rock solid no mater what I throw at it.
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05-28-2007 05:22 AM  13 years ago
0Post 5
litespeed600

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St. Charles, Missouri

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Thanks for the tip KevinR. I think I will try some 95mm tail blades. I would like to try a 611 but the cost doesn't warrent it yet. Will if I can't get this tail lock fixed soon.

TomMarried with 2 kids, I am no stranger to pain!
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05-28-2007 11:20 AM  13 years ago
0Post 6
Ben-T-Spindle

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Central Illinois

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Tail mounted servos don’t help.

Sounds like you have some problem with binding or tight bearings. It could also be a bad servo.

Longer tail blades will help. I like the Century 92mm CF blades myself
http://www2.towerhobbies.com/cgi-bi...vk9&FVPROFIL=++

I just noticed that you have 60 delay – that could be the problem. With the S9254 servo that should always be zero.

Also your power system is not very good. With that battery you need a much higher Kv motor like the Z50A-800. With a E620 setups with a 9 or 10t pinion and 2100-2200 headspeed work best. The extra headspeed will also make the tail run faster and hold better.

.... BTS
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05-28-2007 02:07 PM  13 years ago
0Post 7
litespeed600

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St. Charles, Missouri

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Tail mounted servos don’t help.

Sounds like you have some problem with binding or tight bearings. It could also be a bad servo.

Longer tail blades will help. I like the Century 92mm CF blades myself
http://www2.towerhobbies.com/cgi-bi...vk9&FVPROFIL=++

I just noticed that you have 60 delay – that could be the problem. With the S9254 servo that should always be zero.

Also your power system is not very good. With that battery you need a much higher Kv motor like the Z50A-800. With a E620 setups with a 9 or 10t pinion and 2100-2200 headspeed work best. The extra headspeed will also make the tail run faster and hold better.

.

... BTS
I feel quite dumb for setting the gyro wrong, I heard/read to set to zero before but tht short/long term memory isn't as good as it should be. Some of the guys on the other board already pointed that out to me and I got a couple flights in yesterday evening and it is definately better but not perfect. I think I'll give the 92 or 95 blades a try. The 92 seem to be out of stock every where so I might just go to the 95s.

I went with the Z50A-600 cause I wanted to go to 15s a123's and that can't be done with the 800 motor. So it will have to do right now with the lower voltage.

Thanks for the help.

TomMarried with 2 kids, I am no stranger to pain!
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05-28-2007 02:44 PM  13 years ago
0Post 8
Ben-T-Spindle

rrProfessor

Central Illinois

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Be aware that 92mm blades will allow you to run 620mm main blades. If you run 95mm tail blades and try 620 mains it will explode when you try hard negative collective 3D.

Don’t ask how I know that – LOL.

.... BTS
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05-28-2007 02:52 PM  13 years ago
0Post 9
litespeed600

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St. Charles, Missouri

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Thanks for the heads up. 92's it is!

TomMarried with 2 kids, I am no stranger to pain!
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05-28-2007 05:52 PM  13 years ago
0Post 10
KevinR

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Vancouver, BC Canada

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Be aware that 92mm blades will allow you to run 620mm main blades. If you run 95mm tail blades and try 620 mains it will explode when you try hard negative collective 3D.
Good point, I haven't tried 620mm blades yet so it hasn't been an issue for me but will remember that if I ever switch.
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05-30-2007 09:10 PM  13 years ago
0Post 11
Wheelhaus

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Denver

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If you run 95mm tail blades and try 620 mains it will explode when you try hard negative collective 3D.

Don’t ask how I know that – LOL.
haha, thanks for being the guinea pig on that one!..........
Dave
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