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KAAI YF-61 "Thunderspecter" (Tactical Interceptor)
Itīs finally done! KAAI proudly presents the completed prototype of a heavy, massive old-school interceptor aircraft: the YF-61 Thunderspecter. Design features include an unconventional, huge centerline jet intake on top of the rear section of the plane, taking in air from both in front and via the backswept, functional wings; a massive jet engine with two enormous outtakes and afterburners, well-working retractable landing gear; a nice, pointy and sleek nose; a functioning, openable cockpit; additional drop tanks and full weaponry. The current standart armament consists of two integrated gatling canons underneath the wings, two guided bombs, three rockets on each wing and some smaller, internal bombs integrated in the front landing gearīs shaft. Powerful computer systems only require one pilot to fly and maneuver the Thunderspecter. From the nose until the end of the tail section, the total lenght of the aircraft amounts to 50 studs. Key words: Tactical Interceptor tactical Interceptor Fighter fighter jet Jet intake outtake engine backswept wings Thunder Specter Spectre Thunderspecter thunderspecter military aircraft retractable landing gear afterburner unconventional concept plane prototype empennage tail fin fuselage gatling canon rockets guided bombs
About this creation
The development and production of the Thunderspecter went through different stages, as well documented on photos at the end of this page. But hereīs the finished product first:






































Some pictures of the Thunderspecterīs heavy armament, the first one showing one of the deadly gatlings:

































Aerodynamics (I tried, but my pieces were quite limited:)):

























I really like how the tail turned out - the rear view is one of my favourites:


































Landing gear and weaponry from below:
































The Thunderspecter at the ramp: sometimes, building features some "magic moments": The stairs of the four-engines original Lego Airliner fit perfectly to the height of the YF-61īs cockpit. Actually, they work better than with the airliner...












A close-up of the cockpit:


























































The YF-61 right in front of an C-1 Stratohauler (aerial view):













Functionality of wings and tail - the rear "side rudders" can be used as an air brake, etc...





































The pilot checking the gatling guns:











This Heavy Hauler will be part of my upcoming airport layout, too. Itīs a very useful, "allround" creation I think...






















A size-wise comparison: the Thunderspecter right next to the C-1 Stratohauler, from different angles:

























Development & production memories

As it can be seen on my MOC "Miltary Fighter Jet (under construction)", the Thunderspecter was first of all a pretty open project of which the idea came up during the construction of the C-1. I didnīt have time to continue working on it, and so everything stopped for a couple of months. The pictures taken in the beginning show nothing but the most basic shape of the aircraft: the angle of the swept wings, the basic nose shape and a different arrangement for the engines ( 1 central intake & afterburner + 2 double side engines). (Please check out the old MOC as well.)
The following pics show the further development, which at that time included a 5-engine-conception. Due to my friend Jeffery Smith ("Malenco Union"), who reminded me of the true purposes and needs of fighter jets (maneuverability etc.), the concept got dropped again (I mainly thought the 5-engine-version looked pretty cool - it obviously wasnīt practical, especially considering the fixing of the weapons) and the final product as described above came out of it. So here some pictures of the intermediate step of development:














As you might notice, the centerline engine just featured one outake in this version.





































To Jeffery:
Thank you very much for your review and the helpful advice you gave me during the construction. I know the tail and the engine mounted on top are really unconventional. I researched fighter planes online, but couldnīt find a single one with such a concept. The particular engine design, as well as the fact that I had to use white parts, caused the YF-designation as a concept, prototype fighter. Without being any sort of expert in it, I thought the long tail and the angle of the lower, flipped steep slopes and the substantial tail would make a power/thrust/energy transmission on the entire fuselage possible. I donīt know though, I just wanted to do something different on the one hand and also was quite short on parts on the other hand…
And of course, feel free to use the missile design, no problem:)
























Comments

 I like it 
  September 16, 2009
awesome
 I made it 
  March 25, 2009
Hey guys, hey Tim! Like a swan, thatīs funny:) Itīs crazy: this was my first attempt of a jet fighter - when I look at it now, I must say itīs almost ugly... in particular in comparison to my F-90... Weird how one starts out with one thing (building jets) and ends up at a completely different point (I really prefer my current designs do the initial ones). Oh well, this oneīs history now anyways... Dismantled it a longer time ago cause I needed its parts and didnīt like it anymore... Now itīs just like a "monument", kind of like the C-1 - which was my first big cargo aircraft...
 I like it 
  March 24, 2009
Very interesting engine placement. It looks like a swan with a really big head, lol.
 I made it 
  June 16, 2008
To Adam: Iīd love to cover up a little more the interconnection between the wings, but a huge lack of white parts after the Thunderspecter and the C-1 (I donīt want to dismantle them yet - theyīll be part of an airport layout) makes it rather impossible for the time being.
 I made it 
  June 16, 2008
Many thanks to all of you reviewers for all your constructive criticism! To Ben H.: I know the surface of the wing should be a lot smoother to look better, but I just donīt have enough white tiles anymore, nor special, nicer looking white wing/plane parts. About the angle of the wings, I donīt agree - interceptors can have very steep wing angles like this one, and as Jeffery pointed out, such wings are made for high speeds...
Steffen Kasteleiner
 I like it 
Jeffery Smith
  June 15, 2008
Hey Steffen, I just posted 2 new planes, check them out under my MUAF folder! I'd bet you'd like them. - Jeffery
 I like it 
  June 15, 2008
Looks good, but like on many MOC fighters with unconventional wing sweeps, try and cover it up a tad, might look better.
Steffen Kasteleiner
 I like it 
Jeffery Smith
  June 14, 2008
Oops, not the Hawker Hunter, I got it messed up wiht another plane. My bad, the wing angle looks like the English Electric Lighting. Sorry about the mix up and just to add on, wings shaped like that are designed for high speeds. The Lighting was also an interceptor and I thought it's wierd how the YF-61 is known as "THUNDERspecter" and the LIGHTING...hmm.....A kind of cool coincidence if you ask me.
 I like it 
  June 14, 2008
The body is great, but building the wings out of so many different pieces makes them look kind of ugly. Also, they're swept back too steeply. The engine nozzles are well built and very well placed.
 I like it 
  June 13, 2008
Well, I'm desperately dissapointed I can't give you a 5. Honestly, I was anticipating a really good MOC. But a 4 isn't so bad, is it? At least it doesn't pierce your soul like a 3 does. Anyway, about the creation: overall great attempt. Let me tell you - honestly - that your jet could defeat all of mine combined. Seriously: mine are just plain dumb, even though they get good ratings anyway. Impressive wingspan and use of pieces; brilliant creativity. I love the "airfield equipment" . . . nice use of LC-7893 equipment! Great missiles and rear end, though the cockpit ad nose might need some additional work. The wings are okay, atleast better than version 1. Great job on this, too! I love your creations.
Steffen Kasteleiner
 I like it 
Jeffery Smith
  June 9, 2008
I'm going to enjoy the new comment system and comment again..heheheh. The wing angle looks like that of the Hawker Hunter. As a matter of fact, I have seen amilitary jet wiht a top mounted engine. A German WWII experimental jet who's name escapes me had on mounted atop the fuselage. The "Thunderspecter" also loks like it could take on precison strike, CAS, and anti-ship roles, too.
 I like it 
  May 28, 2008
Hi! Schöner Flieger :) echt gut gemacht, die ganzen details sind einfach großartig =) Übrigens, danke für deine mail und ja, flugzeuge sind ganz cool. Bye, Christian
 I like it 
  May 28, 2008
YAY Its finally done! Steffen this looks great I especially like the weapons and the retractable landing gear is a very cool feature...although i have too agree with Jeffery when I say I think the engines could be mounted in a different spot but since this is you own fighter plane design it really doesn’t matter...anyway this looks awesome especially next too your transport plane......good work and keep building planes------David
 I like it 
  May 28, 2008
bloody brilliant it just looks awesome
Steffen Kasteleiner
 I like it 
Jeffery Smith
  May 27, 2008
I've been waiting for this one...I really like the angle of the wings. The missile design (with the gera piece as the fin) is very creative..I mihgt use it sometime, but of course give you full credit. The tail's gradual increase is attractive, but I can't say I like how the engine is mounted on it. I've never sen that before in a fighter...anyways, much improved over the WIP and great job!
 I like it 
  May 27, 2008
Lookd s little back-heavy. Very, very nice though.
 
By Steffen Kasteleiner
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