|Nov 10, 2006, 09:53 PM|
BAe Hawk Mk.51 Sport Jet: 70mm sized
KITS NOW AVAILABLE
I'm off to a start (albeit slow) on my next project.
It's a Hawk, (I know another Hawk, yaaawnnn!)
I've been longing for one, ever since seeing the Airworld and Skygate versions do their thing on the 6th World Jet Masters DVD.
This year at the Liberty Bell Jet Rally I had the opportunity to meet Chris True and look at his Hawk up close and see it fly. This finalized things for me and when I returned home I found 3 views and started on the CAD model.
Similar goals to my F35 are driving this design:
Must fit in my car (lil' sports car), I refuse to buy a truck or a wagon and my wife has a sedan .
The shape is very scale, I'm dead on in profile and plan view but massaged the intakes a bit to better suit a 70mm fan. I call it a sport jet to keep 'Scale Militants' off my case
Size is about 1/10 and it's on the large end of minifan sized planes. I anticipate having to use a power minimum of 500watts to get okay performance.
Planned construction is full fiberglass composite airframe with deviations where required for strength.
Updates will be slow, as I'm still growing the plug and then need to finish and detail it. Some other (F35 ahem) obligations will also take priority over progress on the Hawk.
Video walkthrough added.
KITS NOW AVAILABLE.
3rd party flight videos.
|Nov 10, 2006, 10:15 PM|
Started with a 3 view, Rhino, a small Airfix plastic model and a Venti Starbucks White Chocolate Mocha (Really good stuff, it's like crack for coffee drinkers).
About 80 hours later (not in one sitting) the basic form, details and component installation are mapped out.
Surface area calculations are made on the finished model and I can then get an estimate of the prototype model weight (looking at the high 40 to low 50 oz range) and wingloading (mid 20's).
The CAD model is built exactly to the 3 view image and then scaled up in size to meet my intake requirements. Wingspan is too large, so I scale down the model and then tweak the intakes to maintain decent fsa.
The CAD model is then 'engineered' for prototyping, this is basically a process of cutting up your virtual model into discrete chunks that can be built by available rapid prototyping means.
I then grew a 5 inch span proto as a proof of form against my 3 view and plastic model, it also served to keep my 2 year old away from my plastic model.
The 'big' model growth process is still in progress, with parts taking an average of 90 hours to build. For those wondering why 90 hours per part when you can get some foam and start carving. Well the parts come out 100% identical to the CAD model, symmetry, details, etc. They also have a hard surface finish so no glassing is needed, just a basic sand and fill.
|Nov 10, 2006, 10:23 PM|
The jigsaw puzzle
The plug is slowly taking shape. All these smaller pieces are finally starting to resemble the CAD model, don't be fooled there's still a long road ahead to maiden.
|Nov 11, 2006, 03:29 PM|
I didn't say it the first time, but it's already beautiful. And it's not even painted yet. It's already full of detail. I like the intakes.
|Nov 11, 2006, 05:28 PM|
Can I pay you to grow a plug for me ?
Anyway, found this on the net. Another potential paint scheme!
"Canadian Snowbirds aerobatic team could take former Swiss BAE Hawks to replace Tutors in unsolicited bid from Venga"
|Nov 11, 2006, 05:55 PM|
But what else is on the table?
beautiful job on the CAD work. I'm sure you'll turn the Hawk into reality as just as nice of a job as you did on the F-35. So that brings up a question maybe a few other people are wondering about too.
What else you thinking about building?
|Nov 12, 2006, 06:07 PM|
It's nice to see the enthusiam of fellow modellers.
I think this will be a fun project, plus it will be my most ambitious to date.
It's way too early for me to even realistically comment on cost, I just want to finish the plug and start on molds .
As for my next project, honestly I don't have one in mind right now.
It's one of those 'I'll know it when I see it deals'
|Nov 13, 2006, 02:31 AM|
Very nice Boogie, I'm mega envious of your skills and access to that "replicator". I feel like a cavemen with my knife and block of foam and scroll saw and lite ply, I should be put on display at my worktable in a museum!
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