RR Rated M For Mature
HOME   rrTV-PHOTO   GALLERIES   MY GALLERY   HELP-FAQ
myHOME PM pmRR MEMBERS 856 ONLINE 18 EVENTS SEARCH REGISTER  START HERE
 
25 pages [ <<    <     1      2     ( 3 )     4      5     NEXT    >> ]34354 viewsPOST REPLY
E-flite . Fast Lad Performance . Ace Hobby

.
.
e-New & Emerging Electrics > EP 400 Build Thread
 
 
Trondhjem
Heliman
Location: Sokna NORWAY

My Posts This: Topic  Forum

I use Align bl 400 lf 3300 kv.
And a Align bl 35 g ESC
Servo's is what Kyosho is purphases.
What do you think of my painting on the bird?
Odd Arne
12-22-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
dkshema
rrMaster
Location: Cedar Rapids, IA

My Posts This: Topic  Forum		That's quite encouraging on several fronts -- first, if the 400LF 3300 KV motor can swing a 26-tooth pinion, then the 430L/3550 ought to be able as well.

The CC35 ought to handle it, as well, since you are running an Align equivalent.

Your canopy is great. Obviously you have much more patience and talent than I when it comes to masking and painting. Very pretty bird in the air.

Thanks for adding to the thread.

Dave
12-22-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
dkshema
rrMaster
Location: Cedar Rapids, IA

My Posts This: Topic  Forum		Trondhjem -- of course there are the inevitable questions -- which batteries (looks like TP 2100s from your pictures), and what kind of flight times are you achieving.

Dave
12-22-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
Trondhjem
Heliman
Location: Sokna NORWAY

My Posts This: Topic  Forum		Hi Dave.
Thanks for the words about my panting job.
It was easy. used three boks of spray and just sprayd on color.
The conopy was not fit togheder befor painting.
White was done at last, and overthe other color to.
It was me that was about to throw the bird in conteiner of trash,
becaus of the troble whit the radio interferens a while ago.
Failure was the ESC from Align.
I got a new one from the dealer.
Use lot of time to figure out that.
Now i use a ferretring on the lead from ESC to reciver.
And a SPCM reciver from jr. Detail pic will come.
The batt pack is
FlightPower Extreme - Kapton 3s1p 2500 HD.
Running time.........................
I dont know.
Never used a klock to take the time.
But i have coolingribbs on the engine.
And it get hot. Not That hot , but almost sow you can smell it hot.
At the 28. i gona fly again, indoor, i take the time and try to find out
rpm at head, and how ht it get.
Merry Chrismas to all of you there out in the World.
12-22-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
Up,Up,Subaru
Heliman
Location: Europe,somewhere

My Posts This: Topic  Forum		dkshema...

Interesting what you have discovered about the 400.
I am impressed with the way you have built it.

The problem with the pitch/collective is connected to the design principle. The design is the same as in the old ep concept. The slop/play is there and it will get worse the more you fly and use the heli. The slop will eventually affect the tracking, and it will become annoying to adjust it every time. Finally it will be come none adjustable and the only remedy is to buy new parts (washout, swash, pitchglider etc).

Knowing Kyosho by now we will never get upgrades to solve this problem. One has got to fix it oneself.

It's really strange that Kyosho put this heli out with this pitchdesign. They should know by now that it should be different. Speaking of different, why is lipo/brushless not standard from factory? Considering how big Kyosho are on the electric rc market, it's something of a mystery to me that they haven't adopted lipo/brushless yet.
12-22-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
ozace
Key Veteran
Location: melbourne, australia

My Posts This: Topic  Forum		I flew my Cal when i first go tit on the stock motor and battery.
The heli flies very smooth and sweet. There was not much power but it did surprisingly well.
Dave the 430 will spin a 26t pinion without any trouble it has oodles of power for a Cal.
The Ultrafly motors recommended by Kyosho will struggle withthe bigger pinions as they are just too small for the job

we can never have too many, can we ?
12-22-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE  
 
 
dkshema
rrMaster
Location: Cedar Rapids, IA

My Posts This: Topic  Forum		I sneaked in a few more minutes of hovering in the driveway this afternoon. I had my throttle curve pumped up all the way to 100%. The rotors were humming right along. And the heli was VERY smooth. I actually had the time and presence of mind to notice how quietly the drive train was running -- not at all comparable to the high-pitched whine out of my T-Rexs.

The hover is rock solid and stable, it DOES remind me of my Calibers. It can only get better with a little more head speed.

The biggest pinion I have on hand has 22 teeth so it looks like another order to Tower for a few more of those Robinsion Racing pinions is on tap. I need to get a Deans whip, too, as I managed to snag the RX antenna and chop it off....ouch! I guess I won't see them till after Christmas!

I guess my biggest worry at the moment is how well that collective system will hold up in the thing.

Dave
12-22-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
dkshema
rrMaster
Location: Cedar Rapids, IA

My Posts This: Topic  Forum		I put my biggest pinion on -- a 22 tooth -- this evening. The swap was pretty easy to do, no hassle. I like that.

Now I need to go dig out my Phoenix Link cable -- seems that I enabled Hard Cutoff mode originally (what WAS I thinking!) -- and man, when the batteries get down to the end, that hard cutoff shuts down NOW! Better go reset that feature to Soft.

The two extra pinion teeth perked up the heli quite a bit. VERY stable and EXTREMELY smooth in hover and I'm back up to about 20% gain on the 401. None of the T-Rex twitchies in hover.

Soon as I get the ESC set up correctly and figure out how long my aging battery pack will turn the 430L, I'll try some simple forward/backward stuff in my front yard. Can't get too high due to trees, and can't get too wild because of houses, road, and cars.

With the extra speed on the head, I've picked up a vibration. I balanced the TR and MR blades tonight, as well as the flybar. Vibration is tolerable, but still there.

Dave
12-23-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
dkshema
rrMaster
Location: Cedar Rapids, IA

My Posts This: Topic  Forum		It's been a few days since I posted anything new with regard to the EP. Christmas and last minute shopping have taken their toll.

I put a 22 tooth pinion on the motor (meanwhile, I discovered that my LHS actually stocks the entire range of Robinson Racing pinions....so I picked up a 25 and 26 tooth version, as well.

BUT -- when I put the 22 tooth pinion on (up from the 20 I had originally put on), I've ended up with a SEVERE vibration from the tail rotor.

I've spent a bit of time troubleshooting this today. First, I removed the main rotor blades to eliminate them as the source. Still had the nasty high frequency virbration, the tail case was a blur.

I then removed the entire tail rotor hub, blades and all -- but then noticed that the TR drive belt was VERY loose. The boom had worked its way in a bit, causing the belt to go slack to the point of beginning to slip.

I put things back together, and went out to the driveway to hover...smooth as silk, and handles the wind much better than my T-Rexes. Also, very very positive on cyclic control, flies and feels like my Calibers larger helis, not like a micro. I like that.

I set down for a minute, then romped on throttle, only to find that the nasty vibration is back. TR case is a blur, the skids too. Something is going on here.

I removed the entire TR hub, fired it up, smooth as silk. Put the hub assembly back on, vibration is back. I whipped out my high point balancer and found the TR hub assembly a bit out of balance. I spent a lot of time tweaking the balance, and as far as I know, the entire hub, grips, and blades assembly is perfectly balanced. It will hold any position I set it to on the High Point now.

I reinstalled the hub assembly, and the huge vibration came back. I removed JUST the TR blades, the thing spins smooth as silk up to full motor RPM.

Put the blades back on, the vibration returns. Something is going on, and it's being real tricky to fix.

I guess tomorrow, after the kids rip open their presents, and after I get the turkey under control in the kitchen, I'm heading back down to the shop and will check the CG of each TR blade relative to each other. Beyond that, I don't know what to do to fix this severe vibration. I must admit, even my T-Rexes have never shook like this.

If anyone out there has any ideas, I'm all ears.

Dave
12-25-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
Caliber1
Senior Heliman
Location: Fort Worth, TX

My Posts This: Topic  Forum		Just curious, did you have TR vibs with the 20 tooth pinion? Was the loose belt a contributor? It will be good when you find out what it is and lets us know. Thanks.
12-25-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE  
 
 
HeliK
Senior Heliman
Location: SoCal

My Posts This: Topic  Forum		Did you check to see if your tail output shaft is bent? Part CA2040. My tail blades tapped the ground and I now have had a high pitched vibration. I removed the shaft and rolled it along a piece of glass and sure enough it made a very small uneven sound when it rolled (meaning it was bent). I changed the shaft and it is good now. I used the old EP Concept tail shaft EH64 it is a bit stronger. Dwight mentioned it would fit and it does.
12-25-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
dkshema
rrMaster
Location: Cedar Rapids, IA

My Posts This: Topic  Forum		I haven't checked the TR shaft yet -- that's a thought. But it does run fine with the hub and grips on, only goes nuts when the TR blades are screwed on.

I didn't notice the vibe with the 20-tooth pinion, and my initial throttle "curve" ended up being 0 -100 - 100 - 100 -100. In the region between the first "0" and "100", the thing runs fairly smooth as the RPM increases in that linear portion. As I approach the wide open end of the range, the vibe begins, it is definitely speed related.

I also suspect it was this nasty vibe that caused the boom to move, making for a loose belt. I tightened the belt (and the mount for the boom), the vibes are still there.

I've got to get past this problem -- as the little bit of forward and backward flying allowed by my driveway impressed me with the stability and controllability -- as I said, it handles much like a larger nitro heli, not a micro.

Dave
12-25-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
Dr.Ben
rrProfessor
Location: Richmond, VA, USA

My Posts This: Topic  Forum		I suppose you better check that the hole in the tail hub itself is not eccentric. Will any other brand of tail blades off a known-to-be-smooth model work?

Ben Minor
12-25-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE  
 
 
ozace
Key Veteran
Location: melbourne, australia

My Posts This: Topic  Forum		Dave , i had the same Vibs at high HS and couldnt find a simple solution. Mine got so bad at High speed that it bent my tail shaft. I have since kept the HS to a managable level. I didnt tach it but it is where the heli is comfortable. It is fast enough to suit most needs but i cant get it to run reliably at Trex speeds.
I have tried several sets of tail blades (all genuine) and didnt improve the situation. My thoughts were that it was just the limits of what the heli was happy with.
I would love for you to find a fix.

we can never have too many, can we ?
12-25-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE  
 
 
Dwight
Senior Heliman
Location: West Chicago, IL

My Posts This: Topic  Forum		As HeliK said the tail shaft is likely the problem. In the beginning I tried tail belt tension and found this had no effect on the vibration. The Caliber 400 has a hard coated aluminum shaft. They start out straight but will take a bend relatively easy. You can bend the shaft in you hand. I have had a problem with mine vibrating and found that the shaft was bent. My solution to the vibration has been to remove the main blades and run up the rotor head to flying rpm while holding the tail. This shows the vibration and what ranges it is at. Then using a very small piece of tracking tape on either tail blade has typically made the vibration go away completely. Any time I have seen the vibration come back I always look at the tail shaft. You can do a direct replacement of the 400 shaft with part CA2040 which is the EP Concept SRK tail shaft. It is a steel shaft. It is heavier but does not bend easily.
12-25-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
dkshema
rrMaster
Location: Cedar Rapids, IA

My Posts This: Topic  Forum		Is the CA2040 readily available, as the EP Concept itself hasn't been for years.

Where can the average Joe go buy some of those?

Dave
12-25-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
RCHeliWorks
rrAdvertiser
Location: RCHeliWorks

My Posts This: Topic  Forum		you want ca2040 or ca3040?

i can get both

chris
12-25-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE  
 
 
RCHeliWorksrrAdvertiser - Location: RCHeliWorks - My Posts This: Topic  Forum
guess what im doing while the rest of the family is in the other room playing with christmas items!!






chris
12-25-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE  
 
 
RCHeliWorks
rrAdvertiser
Location: RCHeliWorks

My Posts This: Topic  Forum		GUYS!!!! LET ME TELL YOU

i installed 091 airtronics servos and a 761 digital on the tail today
and all i got to say is this is the setup (schinitz )tmoores saying or how ever you say it
i also changed to no z-bends i used caliber 30 balls and links also got rods 2mm
if it was not for the small balls on the swash and the little slop on the washout this would be slop free 100%
im thinking of cutting off the balls(plastic) and installing cal30 balls on the swash
its raining today and at my house there is no where to fly
also the airtronics digital 761 fit right onto the frames with no mounts due to the sideways bracket on the servo
one small shim on the pitch lever and one small shim on the slide block with the big e-clip


ill put up pictures after i goto the inlaws for dinner

chris
12-25-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE  
 
 
dkshema
rrMaster
Location: Cedar Rapids, IA

My Posts This: Topic  Forum		Get some good clear close-ups of the mods. I've thought about whacking off the balls from the swash and using the Caliber balls, as well. My supply of 2mm rod is next to nothing out here.

From what I can tell, the HS56 servos on the swash and collective, along with the JR SM-8 (very close to an HS50) coupled with the GY401 is also going to be a great setup.

As far as the CA2040 -- that's supposed to be a tail rotor shaft. The CA 3040 appears to be a pitch slider.

The CA2040, according to Dwight Schilling drops right in, and is less prone to bending than the stock TR shaft.

I'd love to have a couple of the CA2040 shafts, how soon can you get them and how much would they be? I don't know if my TR shaft is bent, but it sure sounds like it. I can't imagine why Kyosho would make the TR shaft out of a hardened aluminum rod! If it's weight they want to save, why not titanium?


Dave
12-25-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
25 pages [ <<    <     1      2     ( 3 )     4      5     NEXT    >> ]34354 viewsPOST REPLY
Esprit Model . Thunder Power RC . Mikado Modellhubschrauber

.
.
e-New & Emerging Electrics > EP 400 Build Thread
 Print TOPIC Advertisers 

Subscribe to This Topic

Tuesday, November 24 - 9:14 pm - Copyright © 2000 - 2009 runryder.com | email | link to rr | START HERE | NF