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Old Jul 22, 2012, 03:08 AM
Heirmeistr is offline
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If it flys, I like it
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I have flown my Habu on the stock setup and now want to try some mods. 1st I want to improve the sound, some guys at my field call most edf jets hairdryers. I hate to admit it but most, including my Habu, do sound like hairdryers. So if I replace the stock fan with the 10 bladed CS fan and upgrade my esc to Castle 100 amp, will that work with the stock motor and 4 cell LiPo? How about a 5 cell LiPo for greater speed? Thanks.
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Old Jul 22, 2012, 05:44 AM
jgalexander is offline
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Flying Full Size & Fun Size :)
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I'd take a peek here: https://www.rcgroups.com/forums/show...ight=chang+sun
The stock habu motor is 3200kv. A 3300kv Turnigy motor pulled 87A on 4s, while a 3000kv Turnigy motor pulled 89kv on 5s. Those numbers seem a little off, so you might try searching the main change sun 70mm forum (below) to see if others have tried the same setup. My guess is that on 5s you'll be very close to 100A.
Josh

https://www.rcgroups.com/forums/show...ight=chang+sun
Old Jul 22, 2012, 11:48 AM
nickelbn1 is offline
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fly and then fly some more!
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Just got done flying my habu with the bigger air duct cut into the bottom gear mounting plate. Made a good difference. ESC is now touchable for as long as I want to touch it where before it was not. Battery was still fairly hot, but still holdable too. Definitely helped. it was 85 degrees and sunny out.
Old Jul 22, 2012, 12:42 PM
Left Coast DJ is offline
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Converting O2 to CO2
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I just drilled two holes near the ESC and two more near the Rx angled towards the ducts.

The two holes near the ESC are very visible and not all that attractive. Is there anything off-the-shelf I can get to make the two holes look less ghetto? I was thinking perhaps screw-hole caps with holes drilled in them. Anything else?
Old Jul 22, 2012, 02:55 PM
v8truckin is online now
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Should've, Would've, Could've
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Quote:
Originally Posted by Left Coast DJ View Post
I just drilled two holes near the ESC and two more near the Rx angled towards the ducts.

The two holes near the ESC are very visible and not all that attractive. Is there anything off-the-shelf I can get to make the two holes look less ghetto? I was thinking perhaps screw-hole caps with holes drilled in them. Anything else?
I used straws and cut them at 45-65* angles and them to length and inserted em inside the fuselage. Makes em look more stock than ghetto, lol! take a look at Takiss post in the last page and you can get an idea of what im a talking about. A dab of hot glue on the straw before you insert it keep it secure. Oh ya I drilled my cooling holes at an angle back rather than straight into the fuse, but works the same way for either ways.
Old Jul 23, 2012, 12:14 PM
SKYRYDER1000 is offline
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Quote:
Originally Posted by Heirmeistr View Post
I have flown my Habu on the stock setup and now want to try some mods. 1st I want to improve the sound, some guys at my field call most edf jets hairdryers. I hate to admit it but most, including my Habu, do sound like hairdryers. So if I replace the stock fan with the 10 bladed CS fan and upgrade my esc to Castle 100 amp, will that work with the stock motor and 4 cell LiPo? How about a 5 cell LiPo for greater speed? Thanks.
The 5s setup I use with my Habu is here.

https://www.rcgroups.com/forums/show...postcount=8994

85amps 1550 watts and so far a 116.9 mph top speed.

You can view my videos of this setup on my youtube page.

http://www.youtube.com/user/skyryder1000
Old Jul 24, 2012, 10:46 AM
rimripper is offline
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Quote:
Originally Posted by nickelbn1 View Post
Just got done flying my habu with the bigger air duct cut into the bottom gear mounting plate. Made a good difference. ESC is now touchable for as long as I want to touch it where before it was not. Battery was still fairly hot, but still holdable too. Definitely helped. it was 85 degrees and sunny out.
I did this mod last year on my habu (posted the temp difference also)
If your going to open the gear port up to let more air in I highly suggest that you also make 2 open ports inside the lipo bay that run into the induction ports for the intake,this will allow the hot air to be sucked out,creating much lower temps in the bay.
Old Jul 24, 2012, 10:51 AM
nickelbn1 is offline
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fly and then fly some more!
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Originally Posted by rimripper View Post
I did this mod last year on my habu (posted the temp difference also)
If your going to open the gear port up to let more air in I highly suggest that you also make 2 open ports inside the lipo bay that run into the induction ports for the intake,this will allow the hot air to be sucked out,creating much lower temps in the bay.
I did. I did that first actually and wasnt seeing a difference so that is when i opened up the opening.
Old Jul 24, 2012, 10:53 AM
rimripper is offline
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Yea it's like letting more air into a motor....if your letting more air in....you need to let more air out.
Old Jul 27, 2012, 01:00 AM
Left Coast DJ is offline
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Converting O2 to CO2
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Anyone take their Habu up high and intentinally stall as a test? If so, easy to recover like other ParkZone planes?
Old Jul 27, 2012, 01:24 AM
crashkorey is offline
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Strange question.but she recovers very well
Old Jul 27, 2012, 02:27 AM
setxws6 is online now
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Hemi pilot
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Quote:
Originally Posted by Left Coast DJ View Post
Anyone take their Habu up high and intentinally stall as a test? If so, easy to recover like other ParkZone planes?
Habu has a low wing loading considering the wing area and weight, it's almost a trainer edf. Also it has a delta wing style and delta wings are know for their stability.
Old Jul 27, 2012, 07:59 AM
kalmon is offline
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Originally Posted by Left Coast DJ View Post
Anyone take their Habu up high and intentinally stall as a test? If so, easy to recover like other ParkZone planes?
I do this on every plane I own! I'd strongly recommend it to everyone. It really helps get a feel for how the plane will handle when slow for landing.

The habu stalls at a ridiculously slow speed for an edf. Stalls on mine almost always are preceded by visible buffeting and wing rock. At the stall there is a large nose drop. If you don't correct you'll get a wing drop as well. Strangely enough mine takes at least 4 rotations to really get into a spin and even then full spin controls must be held. The second you relax the elevator OR rudder it will stop auto-rotating. Recovery is simple just center or slightly push(nose down) elevator and it'll fly out. Make sure you let it build speed before trying to pull out of the dive or it'll re-stall.

-Brian
Old Jul 27, 2012, 02:36 PM
Left Coast DJ is offline
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Converting O2 to CO2
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I too like to stall my planes up high when I get them just to feel more comfortable flying them. But so far I've been too chicken to intentionally stall my Habu, my first EDF, out fear of not being able to pull out of it.

But I'll give it a go this weekend.
Old Jul 27, 2012, 09:50 PM
nickelbn1 is offline
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fly and then fly some more!
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ok, just got back from flying my habu with my new Gens Ace 3300mah 25c 5 cell....and let me tell you...WOW! I have been flying it on a 3300mah 40c 5s Sky Lipo and I feared the Gens Ace would not be enough power or as powerful anyway as the Sky Lipo being only 25c instead of 40c. I had heard several people say though that a Gens Ace 25c is equal to most off brand 40c batteries and they were more then right! either I got a bad sky lipo or they are definitely over rated. This Gens Ace blew the Sky Lipo away! Super fast now! Very noticeable difference. Highly recommend this Gens Ace!


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