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rmalt · 10-02-2010, 10:58 AM

So last night at 11:30pm in my garage I fired up the g5. I was nervous because I never setup a fbl Heli before. First try was a no go because the tail was spinning out of control, tail was set on wrong bank. Second try failed because Heli shook out of control, cyclic gain was set to 100% oops. Third try she got in the air and was nice and stable. Had to add some expo because this is one fast Heli. I jabbed the collective a bit and wow I almost put it through the ceiling. Off to the field tomorrow with the laptop. The one thing need to fix is that I get a bad vibration on spool down. There is also a bit of vibe on spoolup. I didn't ballance the blades yet so I hope that's it.

DominicD · 10-02-2010, 08:55 PM

Blades might be too loose in the grips.

rmalt · 10-03-2010, 04:35 PM

Ok now this crap is getting old! I went to the field today to try to dial this heli in. I couldn't even get it in the air today. When I tried to spool it up it was getting a really bad vibration. This is the FBL version so the head is a very simple setup. The vibration was so bad it ended up tipping over the heli and in turn it broke a servo horn.

I am not a noob with setting up a heli so everything seemed ok. The one thing that I did notice is that I do have some play in the blade grips up and down. I know that others have had some issues with this also. I have my esc setup for slow start so it drags through any vibrations. With the blade grips the radial bearings are tight in the grips but the thrust bearings just fall right out and have some play in the grips. The blades were not on too loose. I just don't know what amout of play in the blade grips would be normal.

Any thoughts?

DominicD · 10-03-2010, 04:52 PM

I know solaris (Mike) had some issues with his FBL head, it seems the holes drilled into the head and grips was too large. This cause the damper and grip bearings to float around.

s0laris · 10-03-2010, 04:56 PM

ahh yes. My FBL kit for the G5 was a bad batch i think.

the Dampers could actually move around in the head block. Also the blade grip bearings could move around inside the blade grips. it gave the heli blades a good 1.5" vertical play.

I ordered a separate head block and blade grip set (Same as fbl version anyways) and its all super tight now.

With that said, my sk720 always complained the the vibration was high, but the heli did fly smooth when it was up to speed.

Rupi · 10-03-2010, 05:04 PM

No play in the blade grips is GOOOOD!
There are realy some issues with the G5 but ive managed to lift it and fly around a litle.
I have mentioned before that im a big fan of Gazaur, mainly because of their flying capabilities and second because of they are realy different fromm all the other helis.
And the Poseidon 480 version will also take a 6s setup without any kind of problem!
With the longer upgrade tail set it will also swing 350 blades!
If you ever wonder about a new 450 class heli then wonder about the Gazaur

3Dmuse · 10-03-2010, 05:13 PM

I have a flybarred G5, so not sure about the flybarless. Here are some thoughts though.

What head speeds have you tried? My experience so far is that the anything below 2350rpm will produce a pretty bad vibration at spool up, spool down, or in a hover. Even chatted with Charley about this and it seems the hard stock dampers are the cause.

Also, I had to let the blades quite loose in the grips, contrary to the common knowledge that says it is better to be wrong on the snug side than on the loose side. How loose? When I rotate the head applying a small force to the blades, they don't move in the grips. But when a hold the heli one side up and shake it a bit, both blades move a bit.

Above 2350rpm and with the blades loose as described above, my G5 becomes a well behaved little sucker that will do anything I ask from it.

FlyAndFix · 10-03-2010, 05:31 PM

Interested, subscribed.

rmalt · 10-03-2010, 08:48 PM

The problem I had today was also the fact that I had my ESC set for slow startup so I couldn't even get it up to flying headspeed before it vibrated off my platform and flipped over.

3Dmuse · 10-03-2010, 09:46 PM

Quote:

Originally Posted by rmalt

The problem I had today was also the fact that I had my ESC set for slow startup so I couldn't even get it up to flying headspeed before it vibrated off my platform and flipped over.

What's your pitch curve in angular degrees? Governed or fixed end points?

rmalt · 10-05-2010, 09:24 AM

I think the problem is solved. When I was doing my test flights I was trying to start it from concrete. I also had the esc on a very slow startup. With the sk 720 starting on a had surface was making a type of vibration that was messing up the gyro. After I fixed the broken horn I started from the grass and everything was A OK! Test hovered 3 battery packs and there was no vibration.

I do notice that there is some what I would call flap in the blade grips. I don't get any vibration from it but I wonder if I should try and put some shims in?

s0laris · 10-05-2010, 11:00 AM

You are welcome

branflake · 10-05-2010, 12:33 PM

Quote:

Originally Posted by rmalt

I do notice that there is some what I would call flap in the blade grips. I don't get any vibration from it but I wonder if I should try and put some shims in?

Flap...like in-out movement away from the main shaft? If so, mine have a bit of play that way, but I think it will be fine, once the head is at speed the centrifugal force will hold them "outwards" pretty hard.

rmalt · 10-08-2010, 05:36 AM

Not in and out, if you look into the blade grips with the blades off you can see the end of the thrust bearing and there is a small space arround the thrust bearing that allows some play. Talked to helidirect and they said it is normal.

Hey bran, have you had you G5 in the air yet?

branflake · 10-08-2010, 09:46 AM

sadly, no. I have been getting ready for winter in our first house (lots of maintenance things to to that i have never done before). I think tonight Ill pull the head back off and level off the swash and set up my pitch and such. Every time i walk into the shop/cave to work on it I get tempted and end up using the time to fly a plane or my msr.

Not to sound like a jerk, but I hope mine is a bit less trying than your first few were.

rmalt · 10-17-2010, 08:41 PM

So I was able to get out to the field today to really try the G5 today. All I have to say is that FBL is the way to go! It really feels like it is on rails.

10-02-2010, 10:58 AM	#1 (permalink)
rmalt Registered Users My HF Map location Join Date: Apr 2007	we have lift off! (I spoke too soon) So last night at 11:30pm in my garage I fired up the g5. I was nervous because I never setup a fbl Heli before. First try was a no go because the tail was spinning out of control, tail was set on wrong bank. Second try failed because Heli shook out of control, cyclic gain was set to 100% oops. Third try she got in the air and was nice and stable. Had to add some expo because this is one fast Heli. I jabbed the collective a bit and wow I almost put it through the ceiling. Off to the field tomorrow with the laptop. The one thing need to fix is that I get a bad vibration on spool down. There is also a bit of vibe on spoolup. I didn't ballance the blades yet so I hope that's it. Last edited by rmalt; 10-03-2010 at 04:36 PM.. Reason: Title change

10-02-2010, 08:55 PM	#2 (permalink)
DominicD The Capi My HF Map location Join Date: Oct 2006	Blades might be too loose in the grips. __________________ Spreading capibara awareness since 2006

10-03-2010, 04:52 PM	#4 (permalink)
DominicD The Capi My HF Map location Join Date: Oct 2006	I know solaris (Mike) had some issues with his FBL head, it seems the holes drilled into the head and grips was too large. This cause the damper and grip bearings to float around. __________________ Spreading capibara awareness since 2006

10-03-2010, 04:56 PM	#5 (permalink)
s0laris Registered Users Join Date: Sep 2006	ahh yes. My FBL kit for the G5 was a bad batch i think. the Dampers could actually move around in the head block. Also the blade grip bearings could move around inside the blade grips. it gave the heli blades a good 1.5" vertical play. I ordered a separate head block and blade grip set (Same as fbl version anyways) and its all super tight now. With that said, my sk720 always complained the the vibration was high, but the heli did fly smooth when it was up to speed. __________________ Team Fun / Heli Canada When you start to be in complete control reflexes are not a requirement.

10-03-2010, 05:31 PM	#8 (permalink)
FlyAndFix Registered Users My HF Map location Join Date: Apr 2009	Interested, subscribed. __________________ KBDD Team Pilot

10-03-2010, 04:35 PM	#3 (permalink)
rmalt Registered Users Thread Starter My HF Map location Join Date: Apr 2007	Ok now this crap is getting old! I went to the field today to try to dial this heli in. I couldn't even get it in the air today. When I tried to spool it up it was getting a really bad vibration. This is the FBL version so the head is a very simple setup. The vibration was so bad it ended up tipping over the heli and in turn it broke a servo horn. I am not a noob with setting up a heli so everything seemed ok. The one thing that I did notice is that I do have some play in the blade grips up and down. I know that others have had some issues with this also. I have my esc setup for slow start so it drags through any vibrations. With the blade grips the radial bearings are tight in the grips but the thrust bearings just fall right out and have some play in the grips. The blades were not on too loose. I just don't know what amout of play in the blade grips would be normal. Any thoughts?

10-03-2010, 05:04 PM	#6 (permalink)
Rupi Registered Users Join Date: Jul 2008	No play in the blade grips is GOOOOD! There are realy some issues with the G5 but ive managed to lift it and fly around a litle. I have mentioned before that im a big fan of Gazaur, mainly because of their flying capabilities and second because of they are realy different fromm all the other helis. And the Poseidon 480 version will also take a 6s setup without any kind of problem! With the longer upgrade tail set it will also swing 350 blades! If you ever wonder about a new 450 class heli then wonder about the Gazaur

10-03-2010, 05:13 PM	#7 (permalink)
3Dmuse Registered Users Join Date: Apr 2009	I have a flybarred G5, so not sure about the flybarless. Here are some thoughts though. What head speeds have you tried? My experience so far is that the anything below 2350rpm will produce a pretty bad vibration at spool up, spool down, or in a hover. Even chatted with Charley about this and it seems the hard stock dampers are the cause. Also, I had to let the blades quite loose in the grips, contrary to the common knowledge that says it is better to be wrong on the snug side than on the loose side. How loose? When I rotate the head applying a small force to the blades, they don't move in the grips. But when a hold the heli one side up and shake it a bit, both blades move a bit. Above 2350rpm and with the blades loose as described above, my G5 becomes a well behaved little sucker that will do anything I ask from it.

10-03-2010, 08:48 PM	#9 (permalink)
rmalt Registered Users Thread Starter My HF Map location Join Date: Apr 2007	The problem I had today was also the fact that I had my ESC set for slow startup so I couldn't even get it up to flying headspeed before it vibrated off my platform and flipped over.

10-05-2010, 09:24 AM	#11 (permalink)
rmalt Registered Users Thread Starter My HF Map location Join Date: Apr 2007	I think the problem is solved. When I was doing my test flights I was trying to start it from concrete. I also had the esc on a very slow startup. With the sk 720 starting on a had surface was making a type of vibration that was messing up the gyro. After I fixed the broken horn I started from the grass and everything was A OK! Test hovered 3 battery packs and there was no vibration. I do notice that there is some what I would call flap in the blade grips. I don't get any vibration from it but I wonder if I should try and put some shims in?

10-05-2010, 11:00 AM	#12 (permalink)
s0laris Registered Users Join Date: Sep 2006	You are welcome __________________ Team Fun / Heli Canada When you start to be in complete control reflexes are not a requirement.

10-08-2010, 05:36 AM	#14 (permalink)
rmalt Registered Users Thread Starter My HF Map location Join Date: Apr 2007	Not in and out, if you look into the blade grips with the blades off you can see the end of the thrust bearing and there is a small space arround the thrust bearing that allows some play. Talked to helidirect and they said it is normal. Hey bran, have you had you G5 in the air yet?

10-08-2010, 09:46 AM	#15 (permalink)
branflake Registered Users My HF Map location Join Date: Jul 2009	sadly, no. I have been getting ready for winter in our first house (lots of maintenance things to to that i have never done before). I think tonight Ill pull the head back off and level off the swash and set up my pitch and such. Every time i walk into the shop/cave to work on it I get tempted and end up using the time to fly a plane or my msr. Not to sound like a jerk, but I hope mine is a bit less trying than your first few were. __________________ Gaui X5! Gaui X3! Outrage G5 Blade mCPX BL \| MultiWii Quadrotor

10-17-2010, 08:41 PM	#16 (permalink)
rmalt Registered Users Thread Starter My HF Map location Join Date: Apr 2007	So I was able to get out to the field today to really try the G5 today. All I have to say is that FBL is the way to go! It really feels like it is on rails.

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