View Full Version : 600 tail rotor blades
Flybar-less
12-06-2007, 12:16 PM
What is everyones preference for tail blades?
Any correlation with Main blade length?
I have been testing various 95mm carbon blades, next i'll try some 105mm blades.
i will be using 90 size K&Bs :thumbs-up2:
uragano47812
12-06-2007, 02:12 PM
With my Logo5003D i will try the stock ones but i have also the 84mm 50class size of K&B.
I think that logo600 fly better with 105mm tail blades and also K&B 90class will be a good cheaper choice.
I've tried 92, 95, and 105's.
I like the 105mm the best, I found with 620mm blades the tail wasn't "nailed" down with 95mm blades. They (the 95's) seemed okay on 600mm blades, but most of our german counterparts are running 105's with 600mm mains.
So I'd just go with the 105's and be done with it.
Regards,
Nathan
Mathias
12-06-2007, 03:06 PM
I am going to run K&B 30/50 size on my ordered Logo 5003D.
jamesotron99
12-06-2007, 03:14 PM
Crap. I just ordered the 30/50 size for my Logo 600. I thought that the "50 size" might mean they were up to the task :/
Mercuriell
12-06-2007, 04:32 PM
The K&B 89mm resonate during assertive tail rotor manoeuvres - the Rotortech 92 blades work better
Flybar-less
12-06-2007, 05:11 PM
I tried the SAB 95s today, they have a little more bite than the CY 95s, the gain will have go down a little to run them.
I will try the SAB and CY 105s this weekend. Kind of leary about breaking grips with larger blades, plus they are pretty close to the ground.
Does Mikado or anyone else offer different size pullies to speed up the tail rotor?
Ticidytoc
12-06-2007, 07:00 PM
Wow, so you guys are saying that the standard 92/95mm tail blade is not enough for 600-610 main blades?
Why?
Wow, so you guys are saying that the standard 92/95mm tail blade is not enough for 600-610 main blades?
Why?
Radix 92's weren't enough at the 2150rpm head speed I was running on 600's.
95's were okay for me with the 600's, with the 620's and 14 degrees of pitch and a whole lot of power turning them (less than 30 rpm drop in head speed at any time), it would twist the heli 45 degrees on a full pitch climbout.
I then tried the 105's, they were great with the 620's and 600's.
The Kreuzbergers have been running 105's at a head speed of 2360rpm for quite a while now, I'm sure they would have found any weaknesses in the ability of the tail to handle 105's.
Regards,
Nathan
OICU812
12-07-2007, 12:56 AM
Radix 92's weren't enough at the 2150rpm head speed I was running on 600's.
95's were okay for me with the 600's, with the 620's and 14 degrees of pitch and a whole lot of power turning them (less than 30 rpm drop in head speed at any time), it would twist the heli 45 degrees on a full pitch climbout.
I then tried the 105's, they were great with the 620's and 600's.
The Kreuzbergers have been running 105's at a head speed of 2360rpm for quite a while now, I'm sure they would have found any weaknesses in the ability of the tail to handle 105's.
Regards,
Nathan
Yea if they can withstand Tom and Max flying them I certainly think it is fine.
Ticidytoc
12-07-2007, 01:22 AM
Radix 92's weren't enough at the 2150rpm head speed I was running on 600's.
Interesting, I guess you guys are flying this bird much harder than I.
OICU812
12-07-2007, 01:53 AM
Only thing that is flying here are fat assed snowflakes with alot of cold. :mad:
Flybar-less
12-07-2007, 03:54 AM
I love to heli-ski in BC!
OICU812
12-07-2007, 04:11 AM
I love to heli-ski in BC!
BC is full of pot heads, lol. But yea their is some ok ski-ing there, I prefer the Rockies in Alberta, real manly mountains, none of that large hill wanna be stuff, lol.
Flybar-less
12-07-2007, 07:48 AM
Normally werer I ski in CO, the peaks are 12,000 to 14,000. I was suprised at how low, 9,000 to 10,000 the range was in BC. Next we are headed to AK.
It is hard to think about skiing with all this warm sunny weather, perfect for flying. I'll guess I've flown 20 times already this week. Plus I am about to get the second Logo Vstabi in the air!
Taipan
12-07-2007, 07:53 AM
You guys are kidding me. Here I was thinking my Radix 95's were too big! Then again I've only had a few hovers so far & yet to dial in the Vbar some more. The tail was pretty powerful though, again need to set it up 100%.
Interesting, I guess you guys are flying this bird much harder than I.
Dunno, more than likely my collective management sucks !
Perhaps I'm running more power too, there's no give at all in head speed when you whack 14 degrees of pitch. The tail definitally got overun on the 92's.
Ticidytoc
12-07-2007, 05:04 PM
I am not running a 4000W power system on 600mm blades so that may be why I am not seeing this.I'm at about half of that, the tail holds just fine with 92's. I'm also not running that much pitch. I'm not actually sure 100% but my eyeball tells me about 12° or there abouts. My Idle1 is at 2150 and Idle2 at 2250+-. My packs are about a year old so I'm sure that may be having some effect on things as I am not getting all the juice I could out of my EVO20's.
I have some 5350's that showed up but I am questioning the weight. Over 2.5 pounds of battery. Not sure If I will like that.
Matt
MrMel
12-07-2007, 05:42 PM
Hmmm, Ive personally seen 3 incidents where the tail-grip bolt (only 2.5mm) broke off, I have talk to others making a total of 7 different incidents.
It was on the Logo 14 but thats the same tail setup, using 92 and 95 blades.
Now its ok to run 105's with that little tiny bolt?
Ohh, I dont know.
We ended up putting T-rex or QuickUK grips/hubs on our Logo 14's to make them hold
OICU812
12-07-2007, 07:00 PM
Hmmm, Ive personally seen 3 incidents where the tail-grip bolt (only 2.5mm) broke off, I have talk to others making a total of 7 different incidents.
It was on the Logo 14 but thats the same tail setup, using 92 and 95 blades.
Now its ok to run 105's with that little tiny bolt?
Ohh, I dont know.
We ended up putting T-rex or QuickUK grips/hubs on our Logo 14's to make them hold
Fredrik, is this the t-rex 600 Quick UK hub you are speaking of? Are you saying it is a direct bolt on with the slider or what? The geometry lines up?
Do you have a picture of this done?
MrMel
12-07-2007, 07:01 PM
Nah, its not a "drop in" replacement, I ended up using half slider from T-rex, and half the slider from the logo.
And I lost some throw, not much but a little.
Ticidytoc
12-07-2007, 07:27 PM
What bolt was breaking? The hub itself was failing or the bolt holding the blade to the grip?
MrMel
12-07-2007, 07:28 PM
Bolt snapping off just where the hub ends.
and they where not overtighten.
MrMel
12-07-2007, 08:08 PM
If you want a guess why its happening here it is:
Compare the Logo (14 with CF tail setup), Logo 600 to any other heli the Logos have insane throw for clockwise piros, those blades must be stalled by then, its more then 45 degree.
So there is ALOT of stress on those small bolts when the blades hits that.
Im now limiting my gyro so its a more "moderate" pitch on the blades, I suspect thats enough for them to hold.
Well, thats my guess at least.