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11 pages [ <<    <     3      4     ( 5 )     6      7     NEXT    >> ]15780 viewsPOST REPLY
Advantage Hobby . Revolution Models . CarbonXtreme

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e-E-Flite Blade CP CX 400-3D > Brushless DD Tail w/ GY401 - Sweet! (Video)
 
 
Micro-Maniac
Elite Veteran
Location: Pasco,Washington Formerly: Captain Chaos

I just put in some test flights using my G90 gyro instead of my GY401 and found that it works just fine despite my skepticism about it

The G90 is not as smooth consistent and well behaved as my GY401 but it does perform adequately

So for those putting off a brushless tail setup for fear their G90 may not play well can put their minds at ease and go ahead and replace their tail motor for possibly the last time ever
06-15-2007 Over year old.
 
 
zAmboni
Heliman
Location: Michigan, USA

^^++

I have the same Feigao/G90 setup as M-M, and It works pretty well. After I got a bit smoother with the rudder and my radio rudder EXP settings straightened out I have had no problems with the combination.

(Note: my previous DD tail problems were due to the tail ESC and not the motor or the gyro).
06-15-2007 Over year old.
 
 
s13flyboy
Heliman
Location: waco, tx

problems w/seperates

I just got done putting a bp10 esc and the standard feigao brushless motor in my blade today. I am using my stock tx and a g90 gyro. I know you have to do the whole "move the rudder to full left" thing b/c of the inability to program the tx. That doesn't seem to be giving me any problems, however when I test flew the chopper the tail would wag like crazy, as if the gyro were at too high of a gain setting, but I had the gain turned nearly all the way down!(between hh and rate mode on th g90) Do you suppose it is the gyro or a tx thing?
06-15-2007 Over year old.
 
 
Micro-Maniac
Elite Veteran
Location: Pasco,Washington Formerly: Captain Chaos

My setup with a G90 seems to like about 40% gain - Any higher and it surges a little or wags - Lower seems to allow more drift

Are you using the remote gain on the radio or the pot on the gyro? When not using the remote gain the gyro operates in HH mode only so I believe the pot translates from 0% full CCW to 100% full CW so 40% should be just CCW of center - When using remote gain I believe 40% will be at about 2 o'clock on the Pro TX knob - Or 60% travel on a DX7 gear channel
06-15-2007 Over year old.
 
 
s13flyboy
Heliman
Location: waco, tx

I have the remote adjustment from the stock tx set up. and it is at about the one to two o'clock position if you are looking at the knob from the top of the tx. any lower and it is like there is no gyro at all, and higher and it wags like crazy. To the point of being so bad that I can't control it. broke the darn boom! Do you thing switching to a 401 or some other gyro would fix it?

P.S. Sorry for hijacking the thread
06-15-2007 Over year old.
 
 
Micro-Maniac
Elite Veteran
Location: Pasco,Washington Formerly: Captain Chaos

Let's start less drastic - Like what prop are you using? Are you using a prop adapter and sure it's well secured?

My first test flight was with something unlabeled between a 3020 and 4530 on a prop adapter and it wagged pretty bad at first then it settled down but the tail hold got real loose then the prop adapter fell off

So i nursed an old slightly damaged 3020 press-on back into service while I'm waiting for new ones and my tail is pretty well behaved with it

BTW I'm running my gyros in DS mode SYK

P.S. You're right on topic here IMO
06-15-2007 Over year old.
 
 
s13flyboy
Heliman
Location: waco, tx

alright, the prop is a 30x30 from bp, the grey one. It's a press on so it shouldn't have any issues like that, I'll try a 30x20 I have.

On the bench it seems to be okay as far as turning the prop.and I can get the motor to spin slowly and then smoothly ramp up the power by playing with the trim and stick. It's just when it is flying that the tail wags horribly.

Also, when the gain is at 100% HH the tail wags constantly and violently, when the gain is set to the 2 o'clock position, it drifts ALMOST uncontrolably and almost 180's when given rudder correction.Worst of all from the above you'd think that there would be a middle ground that would be acceptable if not great, there's NOT. That is what got me on switching the gyro.
06-15-2007 Over year old.
 
 
s13flyboy
Heliman
Location: waco, tx

Oh yeah what do you mean DS and SYK?
06-15-2007 Over year old.
 
 
Micro-Maniac
Elite Veteran
Location: Pasco,Washington Formerly: Captain Chaos

Digital Servo mode
&
So You Know
(yeah not a very common one i guess)
06-15-2007 Over year old.
 
 
s13flyboy
Heliman
Location: waco, tx

yeah, I'm shorthand illiterate Any other advice? I'll have to wait to try the 30x20 prop until I get back in town next week.(and get a new boom ) Can you put a g90 in DS mode, and if so how?
06-15-2007 Over year old.
 
 
Micro-Maniac
Elite Veteran
Location: Pasco,Washington Formerly: Captain Chaos

Oops - I didn't see your other post

The G90 has a Servo Mode switch on the side above the Reverse switch

I'm not really sure what to suggest right now - I know that my GY401/TB9/Feigao/3020 combo worked super nicely for me But GY401s are $140 so I'm hesitant to recommend that when you already have a gyro that's working alright for me and so should work for you as well

If you want to spoil yourself though a GY401 isn't a bad investment in this hobby as it works great with higher end helis too but it's also 3x the weight of a G90 - I have a 2100T that's $104 and people claim it's as good as the GY401 at the size/weight of the G90 but I have little experience with it and haven't tried it on my BCP yet
06-15-2007 Over year old.
 
 
Micro-Maniac
Elite Veteran
Location: Pasco,Washington Formerly: Captain Chaos

I had to drop down to a 9t pinion temporarily and of course I'm getting longer/cooler flights but not really missing the 10t head speed right now
06-17-2007 Over year old.
 
 
pox67
Heliman
Location: Toronto, Canada

Micro-Maniac I would actually be interested in hearing how the 2100T performs for you in the BCP. I had ordered a GY240 from my LHS (2 weeks ago...) but they are being very tardy in getting it in. If it isn't in this week I think I will cancel the order and grab a 2100T as it is cheaper.

I have read the reviews and a few posts on the 2100T but they were all used with belt driven tails. Any idea how it would perform driving the brushless motor tail?
06-17-2007 Over year old.
 
 
Micro-Maniac
Elite Veteran
Location: Pasco,Washington Formerly: Captain Chaos

I just bench tested my 2100T/TB9 and it looks extremely promising - Maybe I'll mount it up and give it a test fly tomorrow - I stole this gyro off my H2 so I'm afraid I won't want to pull it off and go back to my G90 afterwards  
06-17-2007 Over year old.
 
 
Micro-Maniac
Elite Veteran
Location: Pasco,Washington Formerly: Captain Chaos

OK I just came in from test flying my 2100T in high wind as usual and it felt a lot like my G90 to me but without the drift issues and has nicer behavior on the pad during spooling - Neither my G90 or 2100T seem as smooth and consistent as my GY401 to me but maybe the lower head speed has something to do with that - I might have to slap my GY401 back on to try with the 9t for a proper comparison

Anyways - My 2100T definitely works well and is a bit nicer than my G90 IMO
The jury is still out in comparison with my GY401 though
06-17-2007 Over year old.
 
 
Micro-Maniac
Elite Veteran
Location: Pasco,Washington Formerly: Captain Chaos

Ok I swapped my GY401 back in to learn that the different head speeds were not influencing my judgment of these gyros at all - My GY401 is my favorite performing gyro with this setup - It's simply pure silk compared to my G90 and 2100T - Piros are super smooth and consistent and I'm comfortable with a lower gain setting than with the others - I liked the lighter weight of the others but after these back-to-back comparisons I think I prefer to keep my "smooth operator" GY401 on it now - The 2100T was close though
06-18-2007 Over year old.
 
 
pox67
Heliman
Location: Toronto, Canada

Thanks for all the testing Micro-Maniac, much appreciated!

Now I just need to balance weight/price/performance to see which is best for me.
06-18-2007 Over year old.
 
 
jmc67
Senior Heliman
Location: Westchester County, NY

Can the Eflite 3 cell lipo @ 800mah (cp pro stock bat)handle a brushless tail? The heli setup currently has all seperates and a main brushless motor with a brushed dd tail.
06-20-2007 Over year old.
 
 
Micro-Maniac
Elite Veteran
Location: Pasco,Washington Formerly: Captain Chaos

I don't think the load is any different from brushed - I'd expect your packs to perform pretty close to the same as they do now - Hard pulling aerobatics might require better batteries but I've only ever used TP1320s(17A/27A) and I think I'm averaging about 7A but no idea how that spikes out during flight so I personally don't really know when or if the stock lipos(8A/12A) would become inadequate
06-20-2007 Over year old.
 
 
s13flyboy
Heliman
Location: waco, tx

All right all, I have finally put the bird back together! I installed an aluminum tube over the boom so hopefully the boom will survive a strike now.

As for the separates saga, I noticed when I was putting the heli back together that I had the gyro on std which is how the eflite manual says to put it. So I switched to the DS mode and tried to do a test flight. It actually turned out to be a test hover, it was all I could do to keep it still! Next I tried switching to the 30x20 prop as stated earlier, didn't matter at all. Still was uncontrollably twitchy past 2 o'clock gain setting and worse than a rate gyro towards the twelve o'clock pos.

As a reminder this is with a G90 and stock TX, brushless main & tail, the tail is setup pusher style, like stock.

Any advice (other than get a trex) would be greatly appreciated at this point as this pilot is exceedingly frustrated!
06-21-2007 Over year old.
 
 
11 pages [ <<    <     3      4     ( 5 )     6      7     NEXT    >> ]15780 viewsPOST REPLY
Midland Helicopters . HeliProz . ZoomsHobbies

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e-E-Flite Blade CP CX 400-3D > Brushless DD Tail w/ GY401 - Sweet! (Video)
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