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jamin_00
01-21-2012, 06:13 PM
7 hours closer to release now :)


:bacon lol cheers

shannimal
01-23-2012, 03:37 PM
SAB, I have everything I need for the goblin but one thing. I need servo horns and I wanted to shop for them ahead of time so it doesn't stop my build. What does the manual request as far as measurement from center to ball? I want my geometry to be as perfect as possible. Thanks.

gww528
01-23-2012, 03:42 PM
SAB, I have everything I need for the goblin but one thing. I need servo horns and I wanted to shop for them ahead of time so it doesn't stop my build. What does the manual request as far as measurement from center to ball? I want my geometry to be as perfect as possible. Thanks.

Check out the posts here, same question being asked
http://www.helifreak.com/showpost.php?p=3582414&postcount=2

SynergyAero
01-23-2012, 05:54 PM
I noticed on Bert's Goblin, that he was using what appeared to be the Mikado carbon servo arms. I asked Bert, and he confirmed that they were in fact the Mikado's. He recommended them specifically for their high Carbon content.

They are available in 3 flavors: JR, Futaba/Savox, and Hitec. I know the part number for the Hitec is MIK4023, the JR is MIK4022, and the Futaba/Savox is MIK4021. These are readyheli.com's part #'s. Mikado just uses 04021, 04022, and 04023.

Hope this helps.

Cris

shannimal
01-23-2012, 07:01 PM
I noticed on Bert's Goblin, that he was using what appeared to be the Mikado carbon servo arms. I asked Bert, and he confirmed that they were in fact the Mikado's. He recommended them specifically for their high Carbon content.

They are available in 3 flavors: JR, Futaba/Savox, and Hitec. I know the part number for the Hitec is MIK4023, the JR is MIK4022, and the Futaba/Savox is MIK4021. These are readyheli.com's part #'s. Mikado just uses 04021, 04022, and 04023.

Hope this helps.

Cris

do you drill your own hole in them or are they pre-drilled?

shannimal
01-23-2012, 07:03 PM
Never mind I just found them at readyheli. They have a hole already but there is only one hole. I take it this must have the correct spacing?

the.az
01-23-2012, 07:04 PM
Which would you use for the Outrage Torq servos?

Thanks in advance!

SynergyAero
01-23-2012, 08:16 PM
Never mind I just found them at readyheli. They have a hole already but there is only one hole. I take it this must have the correct spacing?

I think you're looking at the wrong part, the MIK4021, 4022, and 4023 all show 3 holes like below:

http://www.readyheli.com/assets/images/photos/MIK4023-2.jpg

Here are the links:

MIK4021 (http://www.readyheli.com/MIK4021-Carbon-Servo-Arm-20-mm-Futaba_p_35281.html)
MIK4022 (http://www.readyheli.com/MIK4022-Carbon-Servo-Arm-20-mm-JR_p_35282.html)
MIK4023 (http://www.readyheli.com/MIK4023-Carbon-Servo-Arm-20-mm-HITEC_p_35283.html)

Cris

OnTheSnap
01-23-2012, 08:31 PM
I think you're looking at the wrong part, the MIK4021, 4022, and 4023 all show 3 holes like below:

http://www.readyheli.com/assets/images/photos/MIK4023-2.jpg

Here are the links:

MIK4021 (http://www.readyheli.com/MIK4021-Carbon-Servo-Arm-20-mm-Futaba_p_35281.html)
MIK4022 (http://www.readyheli.com/MIK4022-Carbon-Servo-Arm-20-mm-JR_p_35282.html)
MIK4023 (http://www.readyheli.com/MIK4023-Carbon-Servo-Arm-20-mm-HITEC_p_35283.html)

Cris

Will the Futaba horn fit the Torq servos?

helicraze
01-23-2012, 08:55 PM
yep i think so

alexvan
01-23-2012, 11:53 PM
Which would you use for the Outrage Torq servos?

Thanks in advance!

Tareq uses the torq servos. He told me on facebook that torq horns are great.

the.az
01-24-2012, 12:01 AM
Thanks alexvan! That's a extra cost I don't have to worry about..

the.az
01-24-2012, 07:40 PM
What pinion will be required to run 2300 head speed with a 4525-520 & the new scorpion 130A using vbar governor?

As far as I know the kit will come with a 22T pinion.

jhheli
01-24-2012, 07:55 PM
I hope you have good batteries.

OnTheSnap
01-24-2012, 08:11 PM
Yah, I'm trying to figure out the best 4m/2200RPM 3D setup possible. I'm thinking a 700mx, vBar gov, 13.5 pitch ought to be right in that range with 6s5000 packs. If I go with a 4525, I'll probably end up with 3m flights? Would love some real world feedback here. Power is not free.

the.az
01-24-2012, 08:19 PM
I have two sets of TP 65c 5000 so I shouldn't have too many issues apart from low flight times haha

Hopefully someone can chime in with a bit of advice :-)

jhheli
01-24-2012, 09:15 PM
I love that 4525, it is really a beast, a friend of mine whiplash weighs almost 13pounds and with the 4525 in it his heli feels extremely powerful, and I didn't feel I needed more, It is cold here so I only flew it for 3min at 2000 headspeed, and I told him his heli felt extra, I was just very happy with this motor.

Oh and the batteries where 45c 5000 nanotechs, I no I could've flown a bit longer but I was just being safe, a good inbetween motor would be the xera 480 not quite 10k power but close and cooler and easier on packs.

2200 with 13 pitch, if you fly hard you will probably get lower flight times if your on the collective the whole time.

the.az
01-24-2012, 09:36 PM
I have flown the 4525 in a E7 and it's a beast. Packs play a big part in the performance though as this motor will destroy anything below 45c (so I've been told).

Xera IMO are better than scorpion, excluding the LE motors of course. I also have a Xera 4530-500 to try in the Goblin so I'll test both motors and make my decision..

Also keen to try a couple of those 65c nano techs to see how they hold up!

jhheli
01-24-2012, 09:43 PM
I would like to no what you like better also, with complete setup and headspeed.

worldofmaya
01-25-2012, 02:10 AM
2200 with 13 pitch, if you fly hard you will probably get lower flight times if your on the collective the whole time.

My TDR with 4,45Ah 65c TPs, HJive and 4525 running 1850 rpm caused 3,5min flight time, with autorotation... a 4535 powercroco can cost you another minute+
-Klaus

the.az
01-25-2012, 05:33 AM
I'll be sure to post my results along with my opinion.

I'm not hoping for long flight times. I will adjust my headspeed and pitch so that I'm able to get reasonable flight times along with power. Due to the light weight of the heli I don't believe this will be too difficult.

TomC
01-25-2012, 06:34 AM
Just my opinion but I think that the main potential problem with this heli is the too high first stage gear ratio. The stock 20t/60t pulley's give you a 3:1 ratio. On high power setups, this is going to be a real killer of both motor bearings and belt life imho.

Ideally, this ratio should not be higher than 2:1 in order to minimise belt tensions. Anything higher than that should include a 3rd bearing mount imho.

To get this ratio they would need to modify the stage gearings to something like; 30/60 first stage, 15/75 second stage and/or provide a 3rd bearing motor bearing.

Cheers,
TomC

rexxigpilot
01-25-2012, 10:03 AM
Just my opinion but I think that the main potential problem with this heli is the too high first stage gear ratio. The stock 20t/60t pulley's give you a 3:1 ratio. On high power setups, this is going to be a real killer of both motor bearings and belt life imho.



Tom, I don't believe the intermediate gears matter to motor bearings, only total gear ratio between load (blades) and motor shaft. The one-way will benefit though.

Thunder Fighter
01-25-2012, 11:55 AM
Most of the motors people are looking at using have much bigger bearings than run of the mill 700 power plants, so I would expect the bearings won't be a big issue for these setups.

Maybe the MX motors and the pyro 700 might suffer, but only time will tell if there is any issue, the primary belt looks pretty wide so won't need to be super tight, especially for these lower power setups.

//Dennis.

TomC
01-25-2012, 12:30 PM
Tom, I don't believe the intermediate gears matter to motor bearings, only total gear ratio between load (blades) and motor shaft. The one-way will benefit though.

Anything higher than 2:1 ratio on primary stage will require you to start tightening the belt in order to maintain good tooth contact. The total gear ratio has nothing to do with this btw.

Most of the motors people are looking at using have much bigger bearings than run of the mill 700 power plants, so I would expect the bearings won't be a big issue for these setups.

Maybe the MX motors and the pyro 700 might suffer, but only time will tell if there is any issue, the primary belt looks pretty wide so won't need to be super tight, especially for these lower power setups.

//Dennis.

Lots of guys have been through this high ratio primary stage problem with the belt driven Ion-x2. Most have found that anything higher than 2.5:1 is a real motor bearing/belt killer. The main design flaw of the Ion-x2 was that it did not have a 3rd motor bearing support imho.

If I were to buy one of these Goblin heli's I would not use anything smaller than a 24t motor pulley (60/24t = 2.5:1) which would give and overall ratio = 8.9:1. For a new/beaut design to come up with a stock 3:1 primary staged belt ratio (they even offer a 15t option which is an even worse 4:1 ratio) without a 3rd motor bearing support is pretty disappointing, esp. with a heli that is intended for hard 3D use. Time will tell of course. BTW the new Quest Inception E12S has a stock 1.78:1 primary belt ratio.

Cheers,
TomC