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Old Sep 15, 2010, 09:14 AM
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Mirage 2000 55mm EDF - Plans & Video

This is my latest sctratchbuild project. It was built from 3-views. After doing a few Jetset44 designs, I decided to venture out on my own! Thanks for the inspiration, Js44! My goal is to provide plans and video once all is sorted out.

Build log, updates and more info here:
http://www.rcgroups.com/forums/showthread.php?t=1305561



Mirage 2000 55mm EDF Parkjet R/C Scratchbuild (6 min 14 sec)
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Last edited by SNice; Mar 25, 2011 at 07:46 AM.
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Old Mar 25, 2011, 07:47 AM
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Plans:
W/S: 22"
Length: 33.5"
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Last edited by SNice; Mar 27, 2011 at 08:04 AM. Reason: Updated Plan files
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Old Mar 25, 2011, 11:34 AM
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NICE BUILD you can get lots thrust out 55mm fan like 25oz's
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Old Mar 25, 2011, 12:12 PM
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Yes, you are right!!! The motor in the video is 5250kv. In the open air, it puts out about 21-22oz of static thrust. Installed in the plane, with intakes and thrust tube, that number is reduced to about 15-16 oz. And she still does great! You could definitely achieve unlimited vertical with a more powerful setup. She still handles well on a 2200 lipo. Any 55mm power system suggestions?
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Old Mar 25, 2011, 03:45 PM
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hyperflow 55mm from great planes motor 24-45-3790 AMMO 4s high c35 2200 ck out http://www.rcgroups.com/forums/showt...hp?t=1205226ma. look's like you need thrust tube at least 2'' might try to shorten intake too look's good tho
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Old Mar 25, 2011, 08:27 PM
EDF rules... :)
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Nice plane and nice paint...

Cheers,
Eric B.
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Old Mar 27, 2011, 11:02 PM
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SNice,

I'm really liking your Mirage. Straight forward and simple build, that scales down real nice. Say 22mm/25mm EDF units.. Keep'em comming out the pipeline. Your L-39 was a looker too.

Ksqm
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Old Mar 28, 2011, 09:21 AM
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Originally Posted by ksqm View Post
SNice,

I'm really liking your Mirage. Straight forward and simple build, that scales down real nice. Say 22mm/25mm EDF units.. Keep'em comming out the pipeline. Your L-39 was a looker too.

Ksqm
Thanks! Thanks for the L-39 compliment too -- I can only take credit for the build on that one though... that was (is) a beautiful flying model designed by Low Pass. It practically flies itself!
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Old Mar 29, 2011, 10:52 AM
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If you reduce the exhaust size (plastic cup with the bottom cut out) you will increase the exhaust velocity and might pick up a few mph in speed.
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Old Mar 29, 2011, 11:36 AM
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Not sure how much smaller I can go -- right now the exhaust thrust tube exit is at 85% FSA. Intakes are 100% FSA.
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Old Mar 29, 2011, 11:42 AM
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YOU LOOKING for more thrust. If you move fan forward shorter intake longer exhaust. Or wou could get rid of intake's cut off in front of fan taper fuse down in front of fan. I know it's not scale. I think it whould look nice. Ill try do in cad
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Old Mar 29, 2011, 12:12 PM
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Nano Mirage

Nice model you have made with a great painting.

I love the Mirage2000 ever since, so I have built me another one this time a bit smaller with a 50mm fan instead of a 69mm fan. The model is completely out of depron and some styrofoam parts. It is powered by a 1800mAh 3s and HET420. Current is about 30A thrust just over 500gr (17.64). The plane weighs 440gr (15.52oz) and performance accordingly. The intake and Exhaust are not larger than strictly necessary. The painting is on its way.







And a little clip
Von W's Nano Mirage (2 min 53 sec)
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Old Mar 29, 2011, 12:15 PM
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customize

just a quick pic
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Old Mar 29, 2011, 04:16 PM
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I commit to following rules for the intake, the fan area minus the area of the motor, you get the ring area. microfan the ring has an area of ​​about 14cm square and the intake of my mirage I have taken additional 1cm ≤. Also important is a pretty good clean intake tunnel without wires, servos and esc. fifteen years ago when we flew jets with speed400 was that the difference between flying and not flying, and then what good was now also working to improve performance.
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Old Mar 29, 2011, 05:42 PM
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Quote:
Originally Posted by Von W View Post
I commit to following rules for the intake, the fan area minus the area of the motor, you get the ring area. microfan the ring has an area of ​​about 14cm square and the intake of my mirage I have taken additional 1cm ≤. Also important is a pretty good clean intake tunnel without wires, servos and esc. fifteen years ago when we flew jets with speed400 was that the difference between flying and not flying, and then what good was now also working to improve performance.
Wow, Von W!!! That is a beauty!!! I hope to be able to produce a full fuse model such as that one day! The performance is amazing too. My original version of the mirage was much lighter and a little bit smaller (19in. ws) It had over 1:1 thrust to weight but the torque roll was crazy. In the video below, you can see she starts to torque roll after slowing down too much. I even made drop tanks for it! It was too boxy and frail for me, so I came up with version 2 -- which is what you see above. I designed the one above thinking that if she flew well, then I would worry about cleaning up the intake. It is very "dirty" in there -- I have the wires and the ESC all in the intake. They are taped down, but they are still in there. I am very interested in how you formed your ducts for your model b/c they look great!
I designed the intake area exactly as you described above, but I left it at 100% the exhaust area is 85% FSA. I don't want cheater holes (hate them); I also don't want oversized intakes (hate them even more). I think the only option for more thrust would be to open up the exhaust and clean up the ducts or upgrade to a more efficient and powerful motor. But I can't believe how maneuverable these little jets are -- they will turn on a dime, and have yet to stall mine!
Can't wait to see your paint job!

Here's version 1 in action...
55mm Mirage 2000 EDF (3 min 21 sec)
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