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180CFX Blade 180CFX Helicopters Information and Help


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Old 03-29-2016, 06:32 PM   #61 (permalink)
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90% tail gyro gain definitely makes a big difference, for the better. Why does the manual specify 50%?

I picked up two ValueHobby.com GForce packs (they're local). They're 46g as opposed to 42g of the stock pack. However, I have two stock packs, one is 42g the other is 46g and it's a little thicker ... Heli doesn't seem to mind the extra few g's.

This heli really moves FAST, even at 3900 RPM.

Changed the RPMs to 4000 and 4500. I'm still poking around trying to find the source of the bobbing - it's a little less after re-tightening one of the main grip screws and swapping the positions of the flanged tail bearings. I guess I can undo what I recently did one part at a time until I find the culprit (main grip bearings, tail grip bearings, spindle, main shaft, tail shaft), but I'm having too much fun with this heli at the moment to do another tear down ... It's got to be bearing and/or shaft related

I have to ask - what are the 'bullets' for on the stock main blades? I've noticed 3rd party plastic and CF blades don't have them.

Blade 180 CFX - Flights 21 & 22 (3 min 45 sec)


Oh - I discovered that with a standard pitch curve of 0-25-50-75-100 the first and last 5% is where a lot of business is taking place. I was using 10-****-90 but didn't like the lack of pitch for emergencies. Then tried 0-****-100 and Geez!, that's too much. 5-****-95 seems to be much better. Again, for now.

After flying and getting used to this heli I can imagine what it's going to be like to fly my big-ol 550s again. They're gonna be like "Dude, chill out on those sticks already - we don't move like dat !"

-John
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Old 03-30-2016, 01:02 PM   #62 (permalink)
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Rubber head dampers.

Where to get just the stock dampers without a rotor head ?



-John
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Old 03-30-2016, 01:10 PM   #63 (permalink)
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Rubber head dampers.

Where to get just the stock dampers without a rotor head ?



-John
Unfortunately... Blade chose not to offer the dampeners without buying the rotor hub. They also chose not to offer a stock screw set.

I can't remember what the brand was that many here use and speak so highly of, someone help me out here? Trueblood maybe?

Lynx sells just dampeners. I use them and love them but a lot of folks have said that they are a bit too hard for their flying style.

I am not sure about Microheli or Rakon, but I would guess they have their own versions as well?
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Old 03-30-2016, 01:48 PM   #64 (permalink)
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Okay, cool ... thanks Spoonerrw.

Looks like the search is on .... I'd probably want some softer ones, initially anyway. Might not be an option though.

Not sure if mine need replacement but probably not a bad assumption with it being a used heli.

-John
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Old 03-30-2016, 06:01 PM   #65 (permalink)
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Okay, cool ... thanks Spoonerrw.

Looks like the search is on .... I'd probably want some softer ones, initially anyway. Might not be an option though.

Not sure if mine need replacement but probably not a bad assumption with it being a used heli.

-John
If i remember the conversations right, the trueblood were a happy medium between the stock and the stiffer Lynx .
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Old 03-30-2016, 07:18 PM   #66 (permalink)
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Thanks ... I'll check those out

In the mean time I found two screws that were loose - the two rear-most on the right side for the front tail boom case. How'd that happen (?) I also changed the orientation of the torque tube, putting the bearing closer to the main frame of the heli. Let's see if any of this affects the bobbing ...

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Old 03-31-2016, 10:45 AM   #67 (permalink)
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http://mattbotos.com/store/index.php...oducts_id=2066

http://www.experiencerc.com/store/pr...ducts_id=18546

Couple of places I found that sell Trueblood dampers. Looks like Experience is out of stock though. I use these too and like them.
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Old 03-31-2016, 11:19 AM   #68 (permalink)
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Sweet!
I might just have to place an order tonight after work .... expensive little suckers!
Thanks Jiminator

Hey - is anyone using those shims that come with stock replacement main shafts? I put one in during the pre-bobble re-build, thinking they were included for a reason, but there wasn't one there before. Maybe I don't need it ... (?) I don't think there was slop before .... maybe they cause probs if not needed ... will check tonight ...

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Old 03-31-2016, 04:30 PM   #69 (permalink)
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Kinda expensive but you do get 2 sets
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Old 03-31-2016, 04:41 PM   #70 (permalink)
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Oh Wow - I assumed from the pic you only got two ... My bad I just saw Matt's pic before.

So just curious as to how low of a throttle curve one can use with the Talon 15 (in endpoint mode, not fixed RPM gov mode) without causing overheating issues. My YEPs, for example, can be run down to 50% as long as 'active freewheeling' is turned on. Works great for low HS experiments. Other ESCs that don't have active freewheeling usually don't like anything under 80%. Has anyone experimented with this heli/ESC? I know this heli is really meant for high headspeeds and extreme 3D, but the engineer in me is still curious .... I realize tail efficiency drops off, and non-symmetrical main blades & softer dampers work better, etc. - just want to know where this heli's limits are without changing pinions or motor kV.

I've read that the disk loading is high for this heli (?) Actually it's closer to average:

Blade 180 CFX
All Up Weight: 190g = .190kg
Diameter of rotor disk: 360mm = .36m, Radius = .18m
Area of rotor disk: 3.1415 x .18m x .18m = .102m
Disk Loading: .190kg/.102m = 1.86kg/m

For comparison (random list, honest):

TRex 250
All Up Weight: 340g = .340kg
Diameter of rotor disk: 460mm = .46m, Radius = .23m
Area of rotor disk: 3.1415 x .23m x .23m = .166m
Disk Loading: .340kg/.166m = 2.05kg/m

TRex 500
All Up Weight: 1915g = 1.915kg
Diameter of rotor disk: 978mm = .978m, Radius = .489m
Area of rotor disk: 3.1415 x .489m x .489m = .751m
Disk Loading: 1.915kg/.751m = 2.55kg/m

TRex 600

All Up Weight: 3.4kg
Diameter of rotor disk: 1347mm = 1.347m, Radius = .674m
Area of rotor disk: 3.1415 x .674m x .674m = 1.43m
Disk Loading: 3.4kg/1.43m = 2.38m

Blade 270 CFX
All Up Weight: 626g = .626kg
Diameter of rotor disk: 620mm = .620m, Radius = .310m
Area of rotor disk: 3.1415 x .310m x .310m = .302m
Disk Loading: .626kg/.302m = 2.07kg/m

Blade 360 CFX
All Up Weight: 850g = .850kg
Diameter of rotor disk: 790mm = .790m, Radius = .395m
Area of rotor disk: 3.1415 x .395m x .395m = .490m
Disk Loading: .850kg/.490m = 1.73kg/m

Blade 230S
All Up Weight: 339g = .339kg
Diameter of rotor disk: 536mm = .536m, Radius = .268m
Area of rotor disk: 3.1415 x .268m x .268m = .226m
Disk Loading: .339kg/.226m = 1.5kg/m

Blade Nano CPS
All Up Weight: 32g = .032kg
Diameter of rotor disk: 205mm = .205m, Radius = .1025m
Area of rotor disk: 3.1415 x .1025m x .1025m = 0.033m
Disk Loading: .032kg/.033m = 0.97kg/m

Blade 400
All Up Weight: 665g = .665kg
Diameter of rotor disk: 718mm = .718m, Radius = .359m
Area of rotor disk: 3.1415 x .359m x .359m = .405m
Disk Loading: .665kg/.405m = 1.64kg/m

Mini Titan E325SE

All Up Weight: 870g = .870kg
Diameter of rotor disk: 738mm = .738m, Radius = .369m
Area of rotor disk: 3.1415 x .369m x .369m = .428m
Disk Loading: .870kg/.428m = 2.03kg/m

Century Swift NX 550
All Up Weight: 2.3kg
Diameter of rotor disk: 1245mm = 1.245m, Radius = .623m
Area of rotor disk: 3.1415 x .623m x .623m = 1.22m
Disk Loading: 2.3kg/1.22m = 1.89kg/m

Hirobo Quark S.R.B.
All Up Weight: 170g = .170kg
Diameter of rotor disk: 355mm = .355m, Radius = .178m
Area of rotor disk: 3.1415 x .178m x .178m = .0995m
Disk Loading: .170kg/0.0995m = 1.71kg/m

Average
(2.05+2.55+2.38+2.07+1.73+1.5+0.97+1.64+2.03+1.89+ 1.71) / 11 = 1.87kg/m

(YMMV)

-John

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Old 04-01-2016, 03:20 PM   #71 (permalink)
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I did some quick math comparing RPMs and resulting blade tip speeds for this heli - Yikes I don't think I'll be flying this one in the house !



Tip Speed (mph) = (Diameter in inches) x 3.1415 x (Revolutions per minute) / (12 inches per foot) / (5280 feet per mile) x (60 minutes per hour)

-John
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Old 04-01-2016, 03:42 PM   #72 (permalink)
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Hey - is anyone using those shims that come with stock replacement main shafts? I put one in during the pre-bobble re-build, thinking they were included for a reason, but there wasn't one there before. Maybe I don't need it ... (?) I don't think there was slop before .... maybe they cause probs if not needed ... will check tonight ...
Those shims are included in case you end up with vertical play on the main shaft. When you install it, check if there is any slop by trying to move the hub up and down. If so, then add a shim at a time until the play is eliminated. Too much shimming could result in premature wear of the bearings.

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Old 04-01-2016, 04:54 PM   #73 (permalink)
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Ok - I'll check and probably remove that shim. I ordered a set of Lynx main shaft bearings to replace the stock bearings - I'll feel better with a new set.

Thanks!
-John

Update:

I removed the shim and there's no up/down slop, so it looks like it's not needed at this time.

Then I followed what others have done and used a Spektrum satellite cable, cut and soldered it to the tail servo wires to shorten them. It's a little cleaner back there now.
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Old 04-02-2016, 10:22 PM   #74 (permalink)
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Default "Schweizer" 180 CFX

I found some old HeliMax Rotofly (?) canopies I bought many moons ago from Tower Hobbies and what do you know ? .... They kinda fit this heli too !

I had to move the canopy mounts in front of the main shaft and the battery wiring has to shuffle around a bit. The canopies snap over the stock canopy mounts, so I might need to do some work here to improve the fit. I had to put two little holes in the canopies for the mounts, but I made the holes 7 years ago to fit on the Hirobo Quark !

This is what happens when the weather gets and stays crappy ....

-John
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Old 04-02-2016, 10:48 PM   #75 (permalink)
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That looks great! Cheaper than the Blade canopy too.

Joe
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Old 04-02-2016, 10:59 PM   #76 (permalink)
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Too bad they're discontinued though - If I remember correctly they came in a bunch of different colors. The price was great too!
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Old 04-03-2016, 12:18 AM   #77 (permalink)
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A little bit of tweaking and I'd say the Schweizer 180 CFX is ready for flight!

I enlarged the holes and moved the rubber grommets. Fits much better.

Then I rotated the battery 90 to allow room for the JST connectors up front. Plenty of room now!

-John
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Old 04-03-2016, 08:52 AM   #78 (permalink)
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That's going to look awesome in the air. You need to post your pix to the 180CFX picture sticky.

I think I'll go searching for one of these canopies. I have no morals and love to steal other people's great ideas.

Joe
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Old 04-03-2016, 08:58 AM   #79 (permalink)
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LOL! I too 'borrowed' the idea from another pilot a long time ago Posted a couple of PICs in the sticky.

I almost went out for a test flight this morning. Then I saw it was 30, and the wind picked up

Maybe Hobbico can help acquire old Rotofly parts since they distribute Helimax ... ?

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Old 04-03-2016, 09:40 AM   #80 (permalink)
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You're going to hate me but it's 66 degrees at 7:30am with 3 mph winds. Expected high of 90 with 2-3 mph winds. The summers are brutal here but the rest of the year is heaven. It's why we stay in Arizona and all the "snowbirds" move here for the winters.

I found some canopies HERE. $4.49 and free shipping. They only have blue though. I ordered two. Hopefully they are actually in stock......

Joe
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