Electric Ducted Fan Jets Discuss electric ducted fan jets here including setup tips, power systems, flying techniques, etc.

Project: GWS A-10 Warthog EDF Brushless

Old 03-07-2007, 05:03 AM
  #76  
kahloq
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Here is mine.
EDF55's w/E-flite 370-4100 inrunners
Battery is TP 2100 3s
I added a nose gun. but this makes it a little nose heavy.
My esc's are located in the ducting itslef so no worry about them EVER getting hot.
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Old 03-07-2007, 05:20 AM
  #77  
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I got a question. I bought a slope version and I would like to know what the little nubs with the groves sticking out inside the rear of the nacelles are for ?
Ken
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Old 03-07-2007, 10:11 AM
  #78  
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I try to avoid sticking the ESC in the duct after trying it out on my Alfa Huckebein and noticing a reduction in performance.

Burying it in the duct with just the heatsink showing is ok, burying in the wing is ok, for my A10 they are in the fuse right where the wing LE mounts, no issue with heat as I ventilated the fuse front to back with exhaust hole in tail and extra inlet underneath.

Ken: I think you are referring to the mounting tabs for pusher props, the GWS heatsinks fit into there. Cut them off and sand smooth if you are going EDF.
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Old 03-07-2007, 05:56 PM
  #79  
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Default KMS Motors

Originally Posted by Tram View Post
Crash9 - What model KMS motors are you using in this bird?

I have one I want to deck out, but don't want to spend a fortune on motors..
Hey Tram, Welcome to WattFlyer. The KMS motors are the ones Hobby People sells with there Fantom Jet. There cheap and are powerful .
KMS Motor - Fantom KBL-21EF Brushless
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Old 03-07-2007, 06:08 PM
  #80  
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I need a cannon for the nose. I'm barely tail heavy and that should help.
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Old 03-07-2007, 07:05 PM
  #81  
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ExtremeRC
Thanks on the info about the tabs . Should I roll some tubes for the exhaust ? I think I'm going to buy another Feigao 25 turn and put two with 3 blade fans in the A-10
Quite a bit more thrust for the same weight. I'm happy . I have 3 projects going and thinking about the 75 % bandit also. Happy Landings Down Under

Ken
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Old 03-08-2007, 04:04 AM
  #82  
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They're for mounting pusher motors if you choose to go that way. EDF guys just trim them off.

John


Originally Posted by bowtie hi View Post
I got a question. I bought a slope version and I would like to know what the little nubs with the groves sticking out inside the rear of the nacelles are for ?
Ken
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Old 03-08-2007, 05:14 AM
  #83  
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They WILL be cut off. No propeller beanies on my Jet.
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Old 03-08-2007, 10:06 PM
  #84  
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after another fan test, i'm going to pull out the DYI motor and install twin Razor heli 2 4200rpm/v motors, i'm still waiting on my cannon to come in... hope it fits.

it's a auto/semi 6mm electric BB, and can fire plastic bb's or paint balls, that will weight the nose down, i'll use a PicoSwitch to turn it on and off. ya baby!

i will likly use my wire-cutter to make room in the fuse and then glass the fuse.
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Old 03-08-2007, 11:58 PM
  #85  
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Must post some pics of your cannon paranoia when you get. Sounds awesome. Im looking for a reason to use my Picoswitch.
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Old 03-11-2007, 08:08 PM
  #86  
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well, the bb is not going to fit....

so i started putting together the fuse


i just glass the inside of the servo area with heavy cloth, and made up a servo holder

and lightly glassed the belly

i've marked the wing with cg at 50 55 65 and 70, everyone uses a different cg?? where should it go???

the 2000mAh 3cell goes in the slot nicly and balances the plane at the 68mm mark
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Last edited by paranoia; 03-11-2007 at 08:26 PM.
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Old 03-11-2007, 10:58 PM
  #87  
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the epoxy dryed fast today, it's 86 in my work area
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Old 03-11-2007, 11:28 PM
  #88  
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Default Summer?

Looking good paranoia. Feels like Summer here. Good weather for glassing and painting. I had to add some fiberglass at the area around the wings hold down nut, as I tightened the wing it started pulling it through the foam and now it's rock solid .
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Old 03-12-2007, 02:18 AM
  #89  
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Here's a link to some A-10 taking off for bombing runs in Nevada.
http://www.richard-seaman.com/Aircra...ras/index.html
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Old 03-12-2007, 03:14 AM
  #90  
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Originally Posted by Crash9 View Post
Looking good paranoia. Feels like Summer here. Good weather for glassing and painting. I had to add some fiberglass at the area around the wings hold down nut, as I tightened the wing it started pulling it through the foam and now it's rock solid .


i havn't glassed that area, (wing nut area) sound like i should,


what's your cg?
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Old 03-12-2007, 03:29 AM
  #91  
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Yep I have some 1/2 oz. glass and water base poly. Theres another place to beef up. Thanks

Ken
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Old 03-12-2007, 10:48 PM
  #92  
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Well I only need to paint now, the plane is fly-able.

I’ve been flying for 4.5yr and this is my 1st 'real' edf, wow the fans are noisy scared the wife and baby at the other end of the house. I need to test it outdoors next time. I think I’m going to use the parkbec with this setup.

I still need to do a full power wattmeter test, hopefully I’ll have some time tonight.
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Old 03-13-2007, 06:11 AM
  #93  
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Default 2 EDFs screamers

Yeah these double EDF can clear the garage at my house when the A-10 is fired up (not a bad leaf blower either LOL ). I hope to maiden mine this weekend
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Old 03-13-2007, 09:41 AM
  #94  
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I got a reply from Janice at UH about there KB20-30-19S 4900 KV 11 Amp 50 gram motors. I might have to get a pair of them with those bada$$ fans they list. 51 mm
300 ~ 1000 g thrust. $58.90 + ship for power for the
A-10. I think the inside of the 50 MM nacelles can be cleaned enough for the 51 MM fans. Can you say fly out of hand ? Looking at the fan I think the KB20 isn't strong enough. Go to 3 blade fan. Same motor 25 oz. thrust for the pair. That would fly a 20 oz. plane. Now I got to make up my mind. Ain't bashin fun ?
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Old 03-13-2007, 05:21 PM
  #95  
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well the Razor Heli v 2's 4250 rpm/Volt are drawing 12 amps each, the pack can put out 24amps continuous so i switched over to two ph25's i had waiting in the wings. so that's ~240 watts.

that power would fly a 2-3lb plane, haha.

so the pack is maxed out, i would hope that inflight draw would be less then the static test. i would not run it at 100% for long anyway.



ha, one thing with the gws blades and duct. The blades expand out when they spin, so the blade tips rub on the duct, then they weld to the inside of the duct, so i'm likly exceding the limit of this edf unit. so just after take off it would be a good idea to power down. or maybe the blades will just assume the correct diameter. haha


also, at 100% power the cell could only run for 5minutes.


i just flew with my new dx7 radio for the 1st time, with my spitfire, i'm very happy with it. The A10 should be a hoot
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Old 03-13-2007, 05:42 PM
  #96  
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paranoia
What size fans do you have ? Sounds like you will ROG without wheels. Someone in RCG made a video & they jumped off the grass.
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Old 03-13-2007, 06:14 PM
  #97  
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gws 55's

maybe with thick grass, but the downward turn at the end of wings may make it tricky
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Old 03-18-2007, 09:31 PM
  #98  
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Default Maiden

She Flys GREAT!!! . I got some time to put the A-10 up for it's maiden and I had a blast!!!. Even with the wind blowing @ 8+ mph I decided to give it a try. This Jet flys awesome with this set up and flew at under half stick and when full throttle is given it screams vert with very little effort . It is over powered just like a jet should be. My flights where 10min. I had to set the DR switches so it would fly closer to scale and less twitchy. On landing it just floats in and is alot easier to land then a lot of planes I've flowen. Each time I ended up running the batterys down so I got to test how will it did dead stick landings . Love this bird and can't wait to go again....
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Old 03-19-2007, 05:17 AM
  #99  
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what's your cg




i'm still working on the painting..... almost there....... i should have it ready for weathering by wed i hope....
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Old 03-19-2007, 06:29 AM
  #100  
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Lookin good ! Mine is still in the box. It won't get caught in a tree that way.

Ken
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