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Old Oct 28, 2012, 09:17 PM
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capt soap's Avatar
dallas tx
Joined Jun 2003
2,846 Posts
Im still a way's off, just thinking. Maybe 4000 40c, 10, or 12 cell. thanks
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Old Oct 29, 2012, 10:46 AM
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RCflyerCT's Avatar
United States, CT, Southbury
Joined Aug 2011
335 Posts
I am at 115 and it is perfect


Quote:
Originally Posted by maxman55 View Post
I'm ready for the maiden of my habu 32 I just need set CG, my set up is cc ice 100 jet fanwith typhoon motor 700-60-1738 , 2x 5300mha Gen Ace lipos and cc pro Bec. Could I get some recomendations of a good Cg starting point? Thanks
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Old Oct 29, 2012, 12:21 PM
Mile High EDF
United States, CO, Denver
Joined Jul 2011
917 Posts
With the habu on its retracts on the ground , you can check your cg by pushing down on the tail, if it slowly settles on the front wheel , your on cg, hope this helps should be around 115mm.

This is with lipo in and rtf.
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Old Oct 29, 2012, 01:46 PM
Michael
United States, ME, Wells
Joined May 2008
1,054 Posts
Habu CG

I started with 105, but kept having landing problems with insufficient elevator authority for flaring (unless I was completely on top of approach, etc.)

Then, following the net wisdom of this group, I moved it back to 110 and, now, 115mm and it made such a huge difference. Even the takeoff run (rough grass) is much shorter and no longer have the dreaded Habu-bounce on landing.

Michael
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Old Oct 29, 2012, 07:23 PM
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Jetnfast's Avatar
United States, MO, Warrensburg
Joined Feb 2008
2,251 Posts
Quote:
Originally Posted by 420flyboy View Post
With the habu on its retracts on the ground , you can check your cg by pushing down on the tail, if it slowly settles on the front wheel , your on cg, hope this helps should be around 115mm.

This is with lipo in and rtf.
I just had to try this out, and sure enough, it works. Nice trick.
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Old Oct 29, 2012, 08:32 PM
Registered User
United States, CO, Loveland
Joined May 2008
355 Posts
I started with my Cg back in the neighborhood of 115-116mm (based on this thread) and so far I haven't had much problem landing. I had to do the same with my Eflite F4 - on that plane I am well behind the Cg range. I do tend to run off the end of the runway sometimes so I'm experimenting with more flap travel to see if I can get it to slow down better.

Greg
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Old Oct 31, 2012, 05:29 AM
Registered User
United States, TX, Wichita Falls
Joined Nov 2011
70 Posts
Hey guys, I know it's kind of an obscure servo, but do you think the spektrum a5030 digitals would work in this bird? Here are the specs:
Product Specifications
Size Category:Minis and Micros
Typeigita
lApplication:25 - 32 size airplanes
Torque:50 oz-in (3.6 kg-cm) @ 4.8V, 66 oz-in (4.8 kg-cm) @ 6V
Speed:0.12 sec/60 @ 4.8V, 0.10 sec/60 @ 6V
Length:1.3 inch (32.8mm)
Width:.58 inch (14.7mm)
Height:1.1 inch (27.4mm)
Weight:0.7 oz (21.6g)
Bushing Or Bearing:Bearing
BearingualMotor
Type:CorelessGear
Type:NylonVoltage:4.8 - 6V

If not, what are most using? I've heard the mc35, or hs-85mgs....
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Old Oct 31, 2012, 04:18 PM
efflux RC's Avatar
United States, CA, Santa Clarita
Joined Aug 2009
8,432 Posts
I've never used them, but you might compare them to the Hitecs we (and many others) use.

HS82mg for the rudder and nose wheel steering
HS85bb for everything esle.

They've been working fine in 5 Habu's, even at 160 mph.
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Old Oct 31, 2012, 08:04 PM
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pollster's Avatar
United Kingdom
Joined Aug 2011
70 Posts
10s habu 32

My setup= het 700-68-1500kv jetfan 80 cc ice 120hv 2x 5s 4000mah lipos.Will this fan unit be able to cope with 10s? Or will i have to use an alloy fan unit?
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Old Oct 31, 2012, 08:07 PM
Mile High EDF
United States, CO, Denver
Joined Jul 2011
917 Posts
Quote:
Originally Posted by pollster View Post
My setup= het 700-68-1500kv jetfan 80 cc ice 120hv 2x 5s 4000mah lipos.Will this fan unit be able to cope with 10s? Or will i have to use an alloy fan unit?
It can handle the watts
I've run 12s
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Old Oct 31, 2012, 10:11 PM
Some Girls r Bigger thn Others
swps's Avatar
USA, UT, Cedar Hills
Joined Jun 2010
1,255 Posts
I just built that setup and I'm only pulling 98Amps at 3000watts on 10s. I'm not gonna fly it on 12s but 11s will be a regular thing with that motor. Unfortunately, my ESC died while taxiing out last week so it's in the process of being replaced and then I'll have some numbers on 11s. The Jetfan isn't rated for that much thrust but it will be fine IMHO. If you decide to go all alloy you'll need a motor with an 8mm shaft as I read Gary doesn't have adapters for 5mm.
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Old Oct 31, 2012, 10:26 PM
efflux RC's Avatar
United States, CA, Santa Clarita
Joined Aug 2009
8,432 Posts
The Mach 80mm EDF uses a 5mm collet.

Gary
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Old Nov 01, 2012, 07:25 AM
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pollster's Avatar
United Kingdom
Joined Aug 2011
70 Posts
Quote:
Originally Posted by swps View Post
I just built that setup and I'm only pulling 98Amps at 3000watts on 10s. I'm not gonna fly it on 12s but 11s will be a regular thing with that motor. Unfortunately, my ESC died while taxiing out last week so it's in the process of being replaced and then I'll have some numbers on 11s. The Jetfan isn't rated for that much thrust but it will be fine IMHO. If you decide to go all alloy you'll need a motor with an 8mm shaft as I read Gary doesn't have adapters for 5mm.
Just done a stactic test on my 10s setup heres the logging result
108 amps max
3926 watts max
48153 rpm
Very pleased indeed,just gotta wait for some fine weather now could be a long wait here in england lol.
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Old Nov 01, 2012, 08:12 AM
Some Girls r Bigger thn Others
swps's Avatar
USA, UT, Cedar Hills
Joined Jun 2010
1,255 Posts
Quote:
Originally Posted by efflux RC View Post
The Mach 80mm EDF uses a 5mm collet.

Gary
That is very good to know! I could have sworn I read a post by you about a month ago stating that the Mach Alloy was a high end solution only for 8mm motors and I decided to go Jetfan again because I already had the motor. Glad I was wrong!
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Old Nov 01, 2012, 02:24 PM
efflux RC's Avatar
United States, CA, Santa Clarita
Joined Aug 2009
8,432 Posts
Quote:
Originally Posted by swps View Post
That is very good to know! I could have sworn I read a post by you about a month ago stating that the Mach Alloy was a high end solution only for 8mm motors and I decided to go Jetfan again because I already had the motor. Glad I was wrong!
That was concerning the 90mm EDF. We've had requests for 5 mm collet for that fan, and they are now available.
Now hat they are in stock, I'll generate two versions of the 90mm EDF. One with 5mm and one with 8mm,
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