View Full Version : Rotorworkz Helifreak Extreme "HFX" Build Thread
Anthony.L
08-13-2007, 03:09 AM
Here is a sneak peak of my 10S Rotorworkz HFX build...
http://www.amoney.org/images/rc/hfx_frame1.jpg
Mercuriell
08-13-2007, 06:11 AM
Very nice - why's everyone's workbench tidier than mine:mad: I like the ESC on the front battery tray - where's the R/C lipo gonna go ? - Make sure you velcro tape your gyro on and not loose it as I did last week (back flying already!)
Anthony.L
08-13-2007, 12:59 PM
The RX lipo is going to go on the bottom side of the battery tray below the ESC. The 611 gyro sensor is secured with velcro as well as the RX. However the 611 amp screen is stuck on with a good piece of 3M tape, it's not coming off!
cmassa
08-13-2007, 07:14 PM
Has anyone tried using Hitec 6965 servos in these frames yet? Will they work with the extra support brackets on the output shaft? I would like to switch to the HFX frames but do not want to buy another set of servos too because I am also buying a Neu 1515 soon. I also really like my Hitec 6965's.
Chris
Anthony.L
08-13-2007, 07:23 PM
They will fit in the frames, question is will be the servo braces line up. Does the 6965 servo use a standard 3mm screw to hold the horn on?
Mercuriell
08-14-2007, 05:07 AM
They will fit in the frames, question is will be the servo braces line up. Does the 6965 servo use a standard 3mm screw to hold the horn on?
No they use self tappers as they have a plastic output gear and shaft.
Ville Erkkilä
08-14-2007, 06:38 AM
Well, I have JR DS8231 -servos and they use 3mm self tapping screws because of plastic gears. I didn't have problems when I installed servo studs.
th3tick
08-14-2007, 11:37 AM
One quick question on this frame. In Finless's 600 build videos, he shows checking the belt tension by tapping the belt on the side and seeing if it slaps the side of the tube. On this frame, that hole is covered up by CF (excepting the Rotorworkz logo).
So, how do you check belt tension on this frame?
John
Anthony.L
08-14-2007, 05:36 PM
There is an access window in the frame directly in front of the rotorworkz logo. I run a TT so can't be sure, but looks like you could easily check belt tension through this window.
Ticidytoc
08-15-2007, 04:59 PM
Looks good Anthony, let us know when you get it in the air.
uragano47812
09-04-2007, 04:04 PM
Can anyone post the optimal linkages lenght for obtain +-12° and max collective like 8°. I use the lenghts described on HFX manual.
nregjeb
09-04-2007, 08:07 PM
One quick question on this frame. In Finless's 600 build videos, he shows checking the belt tension by tapping the belt on the side and seeing if it slaps the side of the tube. On this frame, that hole is covered up by CF (excepting the Rotorworkz logo).
So, how do you check belt tension on this frame?
John
As Anthony stated there is a window. I do run a belt and it is easily checked. No problem.
This frame is very nice. Finished the build yesterday. I have four flights on mine. I like it a lot. I'm currently waiting for my HV85 to come back from CC. ( it got hurt in my last crash on Rotorworkz G10 copy of Align frame. Used this crash as an excuse to upgrade.) Flying on 6s now, I am very anxious to get back to my 8s setup.
jetblue2135
09-05-2007, 08:19 PM
Guys- I just bought a Neu 1515 motor(the new heli version) and was wondering if it would be too tall when mounted on these frames. I would Love to get a set of these but not if I have to cut up all my canopies and have the motor sticking out an inch. Also does this set up save much weight over the stock CF frames?
Ville Erkkilä
09-06-2007, 01:01 AM
It fits perfectly.
jetblue2135
09-06-2007, 06:17 AM
cool thanks, what about the weight, that is one of the main reasons I am looking into these frames....noticable differerence?
Mercuriell
09-06-2007, 06:48 AM
Ready to go with a 1515 motor min weighs in at 3.6kg - thats with a CC 86HV ESC so I guess big weight savings not the primary reason to go HFX.
jetblue2135
09-06-2007, 02:00 PM
gotcha, so is it worth it to go with the HFX frmaes if I am staying 6S? ...guessing the only advantages are the direct linkage and the more centerline CG
uragano47812
09-06-2007, 03:19 PM
Can anyone post the optimal linkages lenght for obtain +-12° and max collective like 8°. I use the lenghts described on HFX manual.
Nobody can help? Are you using lenght of last page of the instruction manual?
OICU812
10-09-2007, 03:45 AM
So I have quite a few flights on this frame now, I'd say around 40-45ish or so. I did notice today that my main shaft had some serious play in it. On further inspection I noticed that it was not the bearings but rather wear inside of the bearing blocks, or at least appears to be as there is some slop and they do not fit anywheres near snug anymore :(. Wondering if anyone else had this issue or maybe I just got a weak or bad set of these bearing blocks?
Mercuriell
10-09-2007, 05:05 AM
Yeah Shawn - noted the same thing after about 30 flights got a shrill vibration from the top bearing block and noticed the bearing had ~ 0.5mm side-side play within the mount - I disassembled it and rebuilt it with builders adhesive (like a thick Goop) and this made the hover more stable and got rid of the noise.
Finless
10-09-2007, 01:55 PM
Hmmm interesting. I am just starting the build videos for this frame so I will have to have a look and possibly reccomend the goop on first build.
Thanks for the heads up.
Bob
Hulley
10-09-2007, 06:59 PM
subscribing to thread.
JesusFreak
10-10-2007, 11:26 AM
Finless:
Wouldn't Goop make for a "flexible" mounting essentially? I would think that would allow vibration that would eventually cause a failure of some sort. I have the HFX frame, but have not built it yet. The bearing blocks are CF, so I'm surprised there is a issue with wearing. I would think there must be some tolerance issue allowing vibration to occur in the first place, and would also think that finding a way to eliminate that initial source of vibration would be key. I think Goop is only going to delay the wear, not really remedy it.
What do you think?
Regards,
Lee
Finless
10-10-2007, 12:07 PM
Not sure but it sounds like the bearings are moving a little and thus over time wearing the CF blocks. Thus my idea would be to help stop any movement and thus no wear. Until I try it I wont really know but to me making sure the bearing cant move at all should prevent this.
Bob
Mercuriell
10-10-2007, 06:50 PM
MY CF mounts were a loose fit from the bearings from the word go and a thin layer of adhesive fixed that - generally leaving a component slack to vibrate or move would exacerbate wear so I'd go with making it steady from the onset. I guess they need a slight interference fit which might be difficult to engineer without having a constant supplier of bearings of consistent size.