logo 400se first flight drama

[hooverit]

first flight, elevator link got stuck on canopy thats what caused first crash second crash main geer stripped and before i could save it head speed dropped to low.only damage was tail fin broke.so far with the flight time i had was well impressed with of responsife it was
http://www.youtube.com/user/MrLynx16.../1/enuiiANFn6k

[Nko15]

Nice save..

[maarset]

Castle ESC right?
Is it in GOV mode?
If so it is VERY HARD on the MOD 0.5 gearing when doing 3D. I went through that whole ordeal with 430 blades.
Not a very happy time in my life.
So either you get a Kontronik ESC like a Koby 90LV or upgrade to the MOD 0.7 gears.
I flew with the MOD 0.7 gears and castle gov and had no gear issues. But it sounded like a Trex.
Now I’m using the Koby 70 and MOD 0.5 gearing (17T) and have had no gear issues at all.
Great vid by the way.

[hooverit]

castle 100 running gov mode will have a look at mod gears thanks.

[TJ Present]

Still and all, nice save. You'll get it sorted.

[marcosp]

Chewed gears even lowering Gov gain?

[maarset]

Lowering the gain didn't help much on my castle. And then the castle gov started really sucking.


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[marcosp]

Was that on a regular 400 or on an SE? The M0.5 is logically at it's limit on the SE, but on the 400 it should have been fine. I am quite worried to hear this. I have my SE on it's way with a CC100 planned (was out of stock). I always fly governed and did not go with a Koby because I plan to move to V-Bar Gov with the 5.2 release (which will include Gov on the Mini) and the future CC update to solve compatibility. Maybe we should either go M0.7 or fly regular curves in the meantime and see how the V-Bar Gov behaves, it should be softer on gears.

[ElectricSheep]

My 400SE project is just about ready for maiden (it was a regular 400 and I got the SE upgrade kit). I was using a Scorpion 3026-1400kv and a Jive 60+LV and I NEVER stripped a gear with the standard 400 combo.

I'll be using the Scorpion 4015-1070, 22T pinion, and the same Jive 60+LV and I'll see how that works with Mod 0.5 by this weekend. I know the Jive 60+ might be a too low of a rating for this, but I'll log the amp draw with a JLog2 and see how it works out.

I don't plan to beat on this particular heli -- just to use it for practice flights. I also got a Hobbywing 70A to try with the V+Bar gov, and if that's not enough then I have a Jive 100+LV as a last resort. I really don't want to mod the frame to use the Mod 0.7 gears -- not to mention the extra noise. I hoped to leave all that behind with the last T-Rex I had.

Oh well, I'm hoping I don't see a lot of main gear teeth getting sheared off this weekend. I'll keep you posted.

[maarset]

Originally Posted by marcosp

Was that on a regular 400 or on an SE? The M0.5 is logically at it's limit on the SE, but on the 400 it should have been fine. I am quite worried to hear this. I have my SE on it's way with a CC100 planned (was out of stock). I always fly governed and did not go with a Koby because I plan to move to V-Bar Gov with the 5.2 release (which will include Gov on the Mini) and the future CC update to solve compatibility. Maybe we should either go M0.7 or fly regular curves in the meantime and see how the V-Bar Gov behaves, it should be softer on gears.

I was stripping gears on a Logo 400 with 430mm blades, ICE75 and Scorp 3026-1600 MOD 0.5 gears.
25 gain in the Castle ESC.
I believe I was using a 15 tooth. So it was the harshness of the castle gov and a smallish 15T pinion that was
Breaking teeth.

Now I’m using the Koby and a 17T with a 1400 KV Scorp and no issues at all.

I think I’ve heard that the Vbar gov is easier on the gear train cause the HS stays very consistent. So I bet you would get away
With a Castle esc in airplane mode and the vbar gov. Spool up is a little harsh but not too bad. That would be a great setup.
Just get the right KV motor so you can use a somewhat large pinion. The more teeth you have in contact with the main gear on the MOD 0.5 the better.
I have a ICE 100 and vbar gov in my Logo 500.

[Libelle]

Originally Posted by ElectricSheep

Oh well, I'm hoping I don't see a lot of main gear teeth getting sheared off this weekend. I'll keep you posted.

I have no problems with the lower KV motors which are recommended for the 400SE, because of the bigger pinion it is no problem to use the Mod. 0,5 gearing it can handle peaks of 2,4KW with my Pyro 600-11 (1050KV)

You will only have problems with the Mod. 0,5 gearing when using 1400-1600KV motors with smaller pionions!

Converting this week to V-Bar governor

[hooverit]

https://www.helifreak.com/showthread.php?t=330646

here is flight log from the video.
ordered new pinion and main gear going to try again will lower gov gain.the short flight i had felt great compered to my t/rex range so not giving up on it yet

[maarset]

Hate to be a Negative Nancy but just lowering the castle gain is not really going to help. Especially since I notice on the vid you really like to get on the collective like that.
Do you have a full size vbar on it?
If so I would use the vbar gov on it with the MOD 0.5 gears and the castle esc in airplane mode.
Or switch to the MOD 0.7 gears. IMO

[hooverit]

Originally Posted by maarset

Hate to be a Negative Nancy but just lowering the castle gain is not really going to help. Especially since I notice on the vid you really like to get on the collective like that.
Do you have a full size vbar on it?
If so I would use the vbar gov on it with the MOD 0.5 gears and the castle esc in airplane mode.
Or switch to the MOD 0.7 gears. IMO

mini v/bar
what are the mod o.7 gears and what pinoin would i use

on further inspection the motor was not sitting right it had a slight angle the pinion was not lever with the main gear,i dont no what happend thier,new one installed so will give it a go .

[helirose]

What was the gear mesh? One local guy was able to strip 1.0 on my Logo 600 because of bad gear mesh (pinion too loose).
And you should properly align pinion with main gear.

Are you runing 473mm blades? If so I would recommend you 0.7 mod. You will have peace in mind, because it's stronger than 0.5 but you will have to use different pinion..

[freakinnovice]

Originally Posted by ElectricSheep

I really don't want to mod the frame to use the Mod 0.7 gears -- not to mention the extra noise.

Please explain the frame mod you speak of. I had a Logo 10 that I changed my gear from .5 to .7 and don't remember having to mod anything at all.

Thanks

[ElectricSheep]

Yo fn - the problem I (and some others) had was that I couldn't move the boom assembly far enough forward into the frame to get the right amount of mesh with the main gear. No matter how hard I pushed that boom forward, the Mod 0.7 tail pulley gear would just barely touch the main gear.

I can't remember who said to do this, but basically I'd have to file the eight holes (in the frame) toward the front to move the boom assembly forward enough to get the right mesh.



I tried two different sets of Mod 0.7 main gears and tail pulleys and neither of them fit. The someone said that you had to file those frame holes a bit. So... I just decided to go with the Mod 0.5 and a 22T pinion. We'll see how it goes...

[hooverit]

yes 473 blades i dont get what this mod 0.5 or 0.7 gears are im total confused now,
ive put the gear mesh tight this will try that,

[maarset]

ES I had to do that to when I used mod 0.7 gears.

The MOD 0.7 gear is a bigger tooth. The mod 0.5 main gear is smaller.
More like a trex 450 main gear.



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[ElectricSheep]

maarset, I think it was you who told me that the "filing" mod was needed. Of course I decided not to do that and will use the Mod 0.5 main gear and 22T pinion for the 400SE.

Originally Posted by hooverit

yes 473 blades i dont get what this mod 0.5 or 0.7 gears are im total confused now,
ive put the gear mesh tight this will try that,

The Mod 0.5 main gear has 200 teeth:


The Mod 0.7 main gear has 138 teeth:


Like maarset said, the Mod 0.7 main gear has bigger and fewer teeth.

The reason some people use the Mod 0.7 main gear is for the bigger teeth, which might be less prone to stripping (depending on the motor, power level, kv, pinion size, etc.). The main drawbacks are that you might have to file the mounting holes in the frame (as I posted above), and this gear is noisier than the Mod 0.5 gear.

If you ever decide to use the Mod 0.7 main gear, remember that you also have to get the Mod 0.7 tail drive pulley gear (MIK3001), as well as a Mod 0.7 pinion.