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Old Nov 20, 2004, 03:17 PM
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mmormota's Avatar
Budapest
Joined Jul 2003
2,575 Posts
Simple F-22 Raptor EDF

I am about to finish a simple Raptor foamie. It is based on the plan of Guy Perez . As the original was a propjet, it needed some modifications, because the EDF requires much thicker fuselage etc.

Data:
Wingspan: 50 cm (the biggest foam sheet I have...)
Weight: 350g
EDF: 60 mm, Alfa (the edf of the famous Alfa MIG15)
Motor: MPJet 25/25-26
Akku: Etec 1200HD or PolyQuest 1500 LiPo
Thrust: 240g
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Last edited by mmormota; Nov 21, 2004 at 04:12 PM.
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Old Nov 20, 2004, 03:22 PM
Registered User
Joined Sep 2004
163 Posts
oh man that is cool!! I wish I had time and skills to build lol.
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Old Nov 20, 2004, 03:24 PM
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Racine, WI AMA# 809291
Joined Nov 2003
5,856 Posts
Nice subject It would look a bit better if you could get rid of that bend line "point" over the motor. Can you show us more pictures the the Ducting?
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Old Nov 20, 2004, 03:53 PM
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mmormota's Avatar
Budapest
Joined Jul 2003
2,575 Posts
Quote:
Originally Posted by RCParkflyer
Nice subject It would look a bit better if you could get rid of that bend line "point" over the motor. Can you show us more pictures the the Ducting?
Sure. The intake side is just the rectangular bottom of the fuselage. As the top of the duct is above the sheet of the wing, I glued a foam cone to the triangle (see my 2nd picture in the first message).

The output duct is just a bended foam tube, with a little cone.
The edf unit is removable, fixed by 3 screws.
All of the electronics are in the tail side, easy to service them, no need for service holes in the fuselage.
The LiPo is in the nose, its weight (104g) is enough to set the proper balance. (the center of gravity according to the original plan).
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Old Nov 20, 2004, 07:09 PM
I am the BBQ Ninja
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United States, MN, Woodbury
Joined Jan 2003
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Cool!
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Old Nov 20, 2004, 08:28 PM
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hawaiianspork226's Avatar
Orlando Int, Florida, United States
Joined Oct 2004
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i agree, very cool!

i think it looks more like an F-35 though! still cool!

-David
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Old Nov 20, 2004, 10:45 PM
what wing man??
hummingbird111's Avatar
Nashville Tennessee
Joined Jul 2003
1,742 Posts
F-22

Very nice ,, let us know how it goes,, maiden?,,flight stabilities?,, work out the bugs?,,
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Old Nov 21, 2004, 11:23 AM
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mmormota's Avatar
Budapest
Joined Jul 2003
2,575 Posts
Maiden

The maiden was today.

The weather was rather windy, almost storm. Just before sunset it improved a bit, so I went to the airport. Unfortunately I was alone, no other pilots take the risk...

Ok, at least easy to handlaunch it in the wind... Full throttle, start.

First impressions:
- I have to glue sometghing to the fuselage, because the trapezoid slips, not easy to hold the plane.
- up trim is necessary, about 3 degree, maybe better to move the center of gravity backwards?
- too sensitive to the aileron (surprised me, as no ailerons just elevons), after -60% expo it is perfect

After trimming, the 2. and 3. flight was very pleasant. Easy handlaunch, just a toss and it is flying. Very stable, even in the wind. Level flight at about 50% throttle. No bad habits. Best of all, it is just not stalling. If I pulled the elevator too hard and it lost speed, it stabilized at a high angle. Just dropped some altitude, but followed the stick. Pulling (or pushing?) out no problem with higher throttle. It makes the landing really easy - thottle down, glide near to the grass, pull step by step the elevator, finally it sits down at almost zero speed.

After sunset it was hard to follow the plane. It is small, rather strange shape, and all white. (I decided to check first if it is flying - if not, why waste my time with painting... ) So I didnt take the risk of trick-flying, just enjoyed the flight.

After the flights I recognised that the wind just not disturbed me at all, the plane was very stable, and the speed was well above the wind speed.
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Old Nov 21, 2004, 12:27 PM
FLY FREE!!!!!!
South Africa
Joined Sep 2004
132 Posts
Congrats!!!
Looks very cool, how r u gonna paint it??
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Old Nov 21, 2004, 12:32 PM
EDF rules... :)
AirX's Avatar
Joined Nov 1999
13,575 Posts
Congrats..

Eric B.
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Old Nov 21, 2004, 02:02 PM
Watts your motivation
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San Bernardino, CA
Joined Aug 2003
6,512 Posts
Good job! How's about posting some plans or templates for it?

Justin
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Old Nov 21, 2004, 04:09 PM
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Budapest
Joined Jul 2003
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Quote:
Originally Posted by roccobro
Good job! How's about posting some plans or templates for it?

Justin
I have no real plans, however I collected together some drawings and construction photos to a pdf file. The plane is rather simple, hope it is enough for building a similar beast... The templates are in OpenOffice drawing format, I attach them too if you need them. Enjoy.

Raptor plans
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Old Nov 21, 2004, 05:04 PM
Registered User
Melbourne Australia
Joined May 2003
90 Posts
Great job I am about to start the same plane today ,it would have been sooner but I spent 2 days in autocad try to tile Guy Perez's original plane he put up .I finnally got the plane all printed and joined up late last night and building today .
Mine will be for mini fan as that is what I have .
Good one mmormota
Terry
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Old Nov 22, 2004, 02:09 AM
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Rudi's Avatar
Österreich, Oberösterreich, Laakirchen
Joined Jan 2001
3,338 Posts
Quote:
Originally Posted by mmormota
I have no real plans, however I collected together some drawings and construction photos to a pdf file. The plane is rather simple, hope it is enough for building a similar beast... The templates are in OpenOffice drawing format, I attach them too if you need them. Enjoy.

Raptor plans
Thank you very much for this wonderful plan !!

Greetings from vienna

Rudi
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Old Nov 22, 2004, 02:47 AM
what wing man??
hummingbird111's Avatar
Nashville Tennessee
Joined Jul 2003
1,742 Posts
maiden

Congrats' on the maiden,,,nice plans ,, think i'll try it out
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