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Old 08-21-2011, 05:25 AM   #1
HELIHANKSTER
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Default Fixed Pitch 450 VOL 2…Featuring the Flybarless FP450

This is kind of a continuation of the Fixed Pitch 450 thread that is in the Esky HBV1/V2 forum here on Helifreak. I have now converted my FP450 over to flybarless and thought it would be a good idea to post the conversion in a new thread here in the Electric Helicopter Section. Even though the FP450 is a fixed pitch helicopter, it’s much larger then most fixed pitch helicopters on the market today and doesn’t really fall in the same category as the smaller 300 size fixed pitch helicopter like Esky and Walkera. So with the re-modding of the Funcopter head and going flybarless, I decided to start a new thread here in what I hope is a more appropriate forum on Helifreak.
Before I get started I would like to add, if anyone is interested in this helicopter, feel free to post here or check out the original FP450 thread. There is a lot of good information located there, as myself and many others have worked hard on making this a truly one of a kind bird.


Original FP450 V1 Thread
http://www.helifreak.com/showthread.php?t=262663


FP450 Flybarless Conversion
Parts needed to make the Funcopter flybarless (Auxiliary rotorless) head.

Funcopter Main Rotor Head Set (M223010)
Funcopter Main Rotor Blades (Pair) (M223022)
Funcopter Main Rotor Lever Set (M223006) X2
Funcopter Blade Holder 5degree (M223003)


I removed the complete Funcopter Head assembly from my FP450. I left this head assembly intact because I have enough spare parts to make a separate FC FBL head.


There are only two things that I have broken on the FC head in my countless crashes, the Main Rotor Hub and two Main Blades. I don’t throw anything parts related away, so I was able to use a damaged Rotor Hub for the conversion, as the damaged Hub ears that hold the Auxiliary Rotor on are not needed for the FBL head.


I sanded off what was left of the ears to give the head a cleaner look


The stock Main Rotor Hub has a pre-drilled hole where the Adjustment Lever goes.


I mirrored and marked the opposite side of Rotor Hub, then drilled the new hole using a bit the same diameter as the factory hole.


You might get away with using only one modified Adjustment Lever and Swivel link as a Wash/Mixing Base arm, if so there is no need to drill out the extra hole in the step above. Most larger FBL heads I’ve seen have two mixing arms, so I decided to go with the two arm setup on my FBL conversion.

I removed the Ball end section of the Adjustment Lever, as I only need to make a hinge between the Hub and the Swivel link.


I installed two 450 ball ends directly into the outside link holes of the FC Rotor Yoke. I did this by drilling out the outside link hole just large enough to use a 12mm long bolt and nut I had on hand.


Here’s a overview picture of the modified FC parts use to make FBL head.


Modified FBL FC head fully assembled and ready to be installed.


FBL FC head mounted to main shaft, head installation complete.


3Axis Unit used and servo placement

I went with the RX2437S 3axis gyro receiver from Walkera for this FBL conversion, It was cheap and really simple to setup.


I kept the receiver orientation the same way as it is in the Walkera CB180Z, but instead of being in the front like on the 180Z, I mounted it in the normal gyro location on the 450 frame as shown in picture below.


Elev servo is on the left side and the Aile servo is on the right side of frame, as shown in picture below.


As far has my settings on the receiver goes.
Alie pot set at 100%
Elev pot set at 100%
Rudder pot set at 85%
Elev-Alie Ext. pot set at 55%
Rudd Ext. pot set at 100%

I am very happy so far with this conversion and the flight characteristics of the FC FBL (Auxiliary rotorless…hehe…people that know about the fun copter will get it.) setup. It’s performing/handling much better than I anticipated…sweetness!


Normally I would show the best flying video I have of the build or mod…Well not this time. This time I want to show the crash I had last Wednesday with the FBL FP450. I could make excuses, but honestly I just didn’t see the tree branch. My pride and joy with only about five or six flight on it, came crashing down hard into my gravel driveway. Why would I show this video? Because the Funcopter head, in my book, is almost indestructable and now with the FBL conversion, there are even less parts to break. The only damage in the crash was two stripped HXT900 servos and three teeth missing on the main gear.

 
Thursday after work I replaced both servos, it took about twenty minutes to replace them and I was back in the air in no time. I left the main gear in as I know the next crash wont be to far away. When it happens I will more than likely change out the gear at that time. You can hear the main gear barking a little in the video I shot on Thursday. But other than a little noise, it doesn’t really affect the performance at all. All in All…this bird is a dream to fly and I hope my Fixed Pitch Brothers will enjoy the video.
 
 
 
 
 
 
 
 
 
 
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Last edited by HELIHANKSTER; 08-27-2011 at 09:56 AM..
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Old 08-21-2011, 05:42 AM   #2
johnnycat500
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Once again HH another killer build thread.I just have to replace a servo and I can maiden my dragonus with your FBL conversion today.
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Old 08-21-2011, 06:07 AM   #3
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Thanks Bud
I like the way the FBL handles so much, that I’m going to convert my other FP450 over. Just waiting on another RX2437S to come in the mail.

Looking forward to what you think of the FBL setup and how it compares to the regular FC head. You know I think the Dragonus is a sweet looking bird and I can’t wait to see how smokin it’s going to look FBL
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Old 08-21-2011, 07:00 AM   #4
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Damn you.....lol. Now I gota spend more money, my wife is gona come after you.

But seriously this is a great thread and it looks like one bad ass bird. Helihankster mod god

Good job man
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Old 08-21-2011, 07:07 AM   #5
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well I can confirm that you do have to orientate the rx like HH has done. I had mine turned 180 and that makes the 3 axis gyro push the elev and aile servo's in the opposite way they should.
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Old 08-22-2011, 05:15 AM   #6
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Quote:
Originally Posted by johnnycat500 View Post
well I can confirm that you do have to orientate the rx like HH has done. I had mine turned 180 and that makes the 3 axis gyro push the elev and aile servo's in the opposite way they should.
You can propably do it if you place the servos at the opposite side.
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Old 08-21-2011, 08:01 AM   #7
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Quote:
Originally Posted by hydmech View Post
Damn you.....lol. Now I gota spend more money, my wife is gona come after you.

But seriously this is a great thread and it looks like one bad ass bird. Helihankster mod god

Good job man
Hyd, good to see ya Bro!
As Johnny has said before…We do a good job helping each other spend money lol and your wife will have to wait in line…cause once my wife finds out that I just order a fuselage to put my other FP 450 in once I do the FBL conversion to it…she’s going to come after me and I can't run as fast as I use too.

Bro I don’t want to be a mod pusher, but this setup does kick a$$!
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Old 08-21-2011, 08:03 AM   #8
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Johnny I don’t know if this helps and I haven’t try it, but I think you can mount the receiver upside down with the three pots facing the back of the Helicopter, but you would have to make some kind of bracket to mount the receiver that way on the 450 clone and keep it protected , so I never tried it.
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Old 03-13-2012, 05:40 AM   #9
whirlynerd1
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Default Almost there

Hankster I am towards the end of my 450 FP build and I am stumped. After installing my 3 servos I have been able to get them all to work in concert except one function. When I move my elevator up or down I can not get the pitch servo to respond.aileron does fine but pitch does not move . Pitch does respond properly to left right.
I suspect I have not given you enough info but any help would be appreciated. Mark
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Old 03-14-2012, 02:46 PM   #10
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I too have mine mostly assembled. I have the HK401B gyro and wondering how to get that set up. I have a digital tail servo and set the switch to digital and delay and limit pots to zero as in the setup guide. After it starts up and initializes, it quiet. If you touch anything it causes the servo to jitter...almost continuously. It also slams the tail blades to the max. I thought the limit pot should control that, doesn't help changing either pot. Any help would be appreciated.
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Old 03-14-2012, 06:13 PM   #11
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jburg, by chance did you see this thread on the 401?, It has some pertnent information. Luckly I saw last week and it really helped me get through that part of my build.

http://www.helifreak.com/showthread.php?t=23209

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Old 03-15-2012, 10:17 AM   #12
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I'll check that out, I keep forgetting about Finless. Another question, anyone have issues with their canopy fitting right? I seem to have to stretch it just a little to far to fit over the posts.....it cracks and groans. Shorten the posts?
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Old 03-15-2012, 12:57 PM   #13
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I noticed that I have to put one side on first then the other, and i'm using custom made canopy posts that I made. This is if your using a 450v2 frame with a standard canopy.
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Old 03-15-2012, 12:59 PM   #14
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Has anybody heard from HH, Havent seen any posts in awhile. Must be building all those gifts he got from Santa.

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Old 03-19-2012, 04:51 PM   #15
dmartarch
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Default Alignment issues with the main rotor

Any one had any issues with the main rotor out of align due to mis drilling the enlargement hole? Any ideas on a solution?

Also even with larger tail blades can not stop the heli from spinning out of control.

Enjoyed the build and look forward to solving these problems.
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Old 03-19-2012, 06:21 PM   #16
icecycler
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Quote:
Originally Posted by dmartarch View Post
Any one had any issues with the main rotor out of align due to mis drilling the enlargement hole? Any ideas on a solution?

Also even with larger tail blades can not stop the heli from spinning out of control.

Enjoyed the build and look forward to solving these problems.
dmartarch
There really isn't a solution for mis-drilling the rotor head. It happened to me and the only thing I did was get a new head and drilled it over. I wasn't satisfied with that so I made an aluminum head, similar to what ATC did on his.

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Old 03-21-2012, 07:52 AM   #17
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Do you have any special setups on your radios? Just wondering why I'm having difficulty with flying this beast (well could be because I built it)!! I've started pretty basic with the radio, dropped the rates a little on the Elev and Aler, but thats about all. Swash looks level with power on and the controls work smooth. Thanks for any help.
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Old 03-21-2012, 08:41 AM   #18
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jburg
all I did was back down the throw limits on the elevator and aileron servos. This way if I pushed the sticks too far the bird would not travel that far in those directions. It makes it a bit more easier to fly.

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Old 03-23-2012, 02:06 PM   #19
jburg
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Not sure if this is the proper place for this question, but the HK401B gyro matched to a Corona DS-919MG servo seems to quiver a lot. Even when sitting perfectly still. Is this normal? Servo bad or maybe the gyro.
Another question.....the FC head flybar - item 59 on the manual has three holes. If you use different holes for you zlinks and swash arms, what would that do for you?
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