|
|
Thread OP
|
Discussion
Newest ducted fan build!*******
this is my newest bird, i built her in about 45 minutes using my proven method of deigning. ( See Other Posts )
She should be one heill of a plane! specs are: wingspan: 30 in Fuselage Length: 30 in V Stabilizer ( L*h) 7.5 X 5 in H Stabilizer: 10 x 3.5 Ducted fan is right at the nose!. TELL ME FORUM, DO YOU WANT A VIDEO????????? |
|
|
|
|
|
|
I'm definitely interested in ducted fans but never built a model with one. I guess looking at the $$ tag killed it for me, and the thrust from the GWS fans looks pretty wimpy.
Perhaps the pitch speed is so high you don't need as much thrust ? But it seems that the cheap ones can only drive super lightweight models, like under 6 ounces. Anyone knows better tell me I am wrong......please !? Cool looking model, I'd like to build a heinkel salamander but I'm a total new-bee with DF stuff. What fan are u using and whats your total weight? Oh yeah, if you got a vid bring it on ! |
|
|
|
||
Thread OP
|
Quote:
This airplane underwent a overhauling, i completely changed the nose section and the EDF is on top of the fuselage! but the thing with DF is that you have to have them above or under the trust line. If its in between then the slightest inch of deflection sends you spiraling. The salemander would be a good choice. go to hobbycity.com look under parts & Acces. look under EDF'S look at a 12.00 64mm edf and you should know where to go from there! |
|
|
||
|
|
|
How does an edf on the thrust line make your plane spiral on surfae deflection? I don't mean to be rude in any way, but don't most df and turbine aircraft have their thrust on the thrustline? What makes them different than a propeller besides the basic airflow at certain points of speed? I am not trying to offend in any way, but was just wondering how you came up with that idea.
|
|
|
|
|
|
I'm interested as well. Especially because I have a EDF unit sitting at home and I want to build something!!!!
I had it mounted on the back of a hacked up Srtyker wing and had horrible success! It was mounted quite a bit above the wing, I thought it was too far, causing the thrust to push the nose down. End result, the mount is broken on the EDF unit, so I'm looking at making a design similar to yours that will not require the use of the "stick mount". |
|
|
|
||
Thread OP
|
Quote:
i had it off by like 1/8 of an inch and trust me, IT AFFECTS IT!! Also the low wing on the aircraft makes it naturally unstable! |
|
|
||
|
||
Thread OP
|
Quote:
Ducted fans perform best on top of a wing about 1/4 behind the LE also ducted fans like high wing aircraft! that is, for scratch built |
|
|
||
|
||
|
Quote:
BECAUSE, what care to explain. It dosen't make any sense. If you want a true explanation visit the EDF section of this forum. |
|
|
||
|
||
Thread OP
|
Quote:
it was to slow! The air had to travel to far a distance and it stalled to quickly |
|
|
||
|
||
|
Quote:
By definition the thrust line bisects the motor or shaft if it has one. You could be off on the thrust angles in relation to the center line of the aircraft. Is that what you meant? Plus, it's really not necessary to start so many threads with the same subject, even if they are in different forums, the answers you get just get diluted, not to mention that it's really against the rules. Azarr |
|
|
Last edited by Azarr; Jan 21, 2010 at 07:56 PM.
|
|
|
||
Thread OP
|
Quote:
yes through all the jibberish thats what i was trying to say!. and yes my friend jets with the fan on top like to balance at 1/4, 1/3 of the wing. swept back wings are about 1/2 and foward swept is something like 1/4 from the back i think. |
|
|
Last edited by flyingwing12; Jan 22, 2010 at 11:06 AM.
|
|
Thread Tools | |
Similar Threads | |||||
Category | Thread | Thread Starter | Forum | Replies | Last Post |
Discussion | Newest ducted fan build!******* | flyingwing12 | Foamies (Scratchbuilt) | 4 | Jul 01, 2010 01:56 AM |
Off Site | Kyosho Jet Ducted Fan System brand new | gliders | Aircraft - Fuel - Jets (FS/W) | 0 | Jan 09, 2010 10:08 AM |
Cool | The newest testing data for AEO 30mm ducted fan. | AEORC | Electric Ducted Fan Jet Talk | 41 | Jan 04, 2010 03:16 AM |
Discussion | T-38 Talon 64MM Ducted Fan Build Video | JetA320 | Foamy EDFs | 4 | Sep 16, 2009 12:04 AM |