Welcome, Guest. Please Login or Register
Stick and Tissue Logo
 
  HomeHelpSearchLoginRegister  
 
 
Pages: 1 2 3 
Send Topic Print
Me-262 Jetcat (Read 1718 times)
Reply #37 - Jul 29th, 2018 at 10:45pm

pb_guy   Offline
Senior Member
So I'm just a kid at heart.
Youbou, BC, Vancouver Island

Posts: 1143
****
 
Ran across this video of a real 262 at an airshow in Germany in 2006. https://www.youtube.com/watch?v=8FA1yCfz9s4
ian
 
IP Logged
 
Reply #36 - Jul 29th, 2018 at 8:22pm

MKelly   Offline
Senior Member
Helotes, TX

Posts: 508
****
 
Had a nice little flight with the Me-262 today:

https://www.youtube.com/watch?v=vnQ5gQXj7wI&t=2s

 
IP Logged
 
Reply #35 - May 28th, 2018 at 12:57pm

Sky9pilot   Online
Administrator
Stick & Tissue
Kelso, WA 98626 USA

Posts: 9680
*****
 
Mike,
I admit that I don't use my best balsa for Catajets...I usually use the craft store balsa from Michaels etc.  It's usually much harder balsa 7-9 lb stuff that holds up to abuse much better than the lighter stuff I use on rubber powered balsa models.  I'll take your advice on the nose ply doubler and extend it back past the intake.  I'll have to double check the top and side views again.  Thanks for input.  Edit:  changes made to plan.  Thanks again for your input!
Tom
 

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
IP Logged
 
Reply #34 - May 28th, 2018 at 12:24pm

MKelly   Offline
Senior Member
Helotes, TX

Posts: 508
****
 
Tom that's going to be big!  It'll be interesting to see how well your nose section holds up.  I originally made mine from balsa as part of the 1/8" sheet fuselage core (see pictures on my plan), but the model flies so fast that after a couple of months it was very chewed up.  My solution was to insert a section of lite ply; this has held up well over the last year. 

My suggestion for your design would be to make the nose core forward of the canopy from hard balsa.  You might also want to extend the ply doublers aft to the rear end of the canopy so the nose won't snap off at the intakes.

One question on your plan - it looks like the wing and engine pods are further forward on the top view than they are on the side view - am I seeing that right?

I like your approach to the wing.  I'm tempted to try this at about 12" span.

Mike

 
IP Logged
 
Reply #33 - May 28th, 2018 at 1:03am

Sky9pilot   Online
Administrator
Stick & Tissue
Kelso, WA 98626 USA

Posts: 9680
*****
 
Here's a link to my Scimitar plan.  I drew it at 1/8" sheet fuselage with 1/64" ply doublers on the nose.  Of course that could be increased to 1/4" sheet. I will build using the lighter 1/8" sheet.  Here's a link to the plan: Scimitar Plan
Tom
 

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
IP Logged
 
Reply #32 - May 27th, 2018 at 11:06pm

Sky9pilot   Online
Administrator
Stick & Tissue
Kelso, WA 98626 USA

Posts: 9680
*****
 
I liked the performance of the 262 at 17" so I drew my plan to 17" with the built up wing but I used a cracked rib structure rather than cut out ribs. Still have to calculate the CG.
Tom
 

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
IP Logged
 
Reply #31 - May 27th, 2018 at 6:25pm

MKelly   Offline
Senior Member
Helotes, TX

Posts: 508
****
 
Look forward to seeing it - are you going to make it bigger?
 
IP Logged
 
Reply #30 - May 27th, 2018 at 4:09pm

Sky9pilot   Online
Administrator
Stick & Tissue
Kelso, WA 98626 USA

Posts: 9680
*****
 
HPA...That was my first exposure to Catajets!!!
They are highly addictive!
I'm definitely getting the itch to build some more.  I've borrowed the built up wing from your 262 in my Scimitar CAD drawing. Which I'll post later.  I like the looks of it!  I'm also setting the incidence to 0 degrees for wing and stab.  And plan on using gurney flaps for trimming.
Tom
 

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
IP Logged
 
Reply #29 - May 27th, 2018 at 11:58am

MKelly   Offline
Senior Member
Helotes, TX

Posts: 508
****
 
Thanks Tom.  I don't know if Henry intends to publish or distribute the Me-262 plan - I'll ask him.  I cobbled the Scimitar up from three-views and pictures.  There's some summary information in the Catajet thread on HipPocket beginning on post #507:

http://www.hippocketaeronautics.com/hpa_forum/index.php?topic=3985.500

I updated my Scimitar working drawing with a few notes and pictures but the PDF is too big for the file attachment limits here.  I've attached a JPG image of it.

If (when) I make another I'll probably scale it up a bit, maybe more like 9-10" span, and I'll reduce the amount of enlargement on the stab from 133% to something more like 120%.

Having some way of adjusting the stab angle is critical for this small, fast jetcat.  I used a nylon jackscrew with a music wire pivot, but you could use shims or some other method.  It's very sensitive - I usually adjust the 0-80 screw 1/8-1/4 turn max when making changes.

The wings are flat (no dihedral) so the washout is important - I also attached a slide showing how I approached sanding washout into the sheet wings.

If you make one please post some pictures and let me know how it flies for you.

Mike


 
IP Logged
 
Reply #28 - May 25th, 2018 at 9:20pm

Sky9pilot   Online
Administrator
Stick & Tissue
Kelso, WA 98626 USA

Posts: 9680
*****
 
Wow Mike...gonna have to build me those two Catajets...outstanding flights from both birds!  Do you know if they sell just the plans for that 262?
Is the Scimitar a kit also or did you take that off of some Jetex plan?
Tom
 

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
IP Logged
 
Reply #27 - May 25th, 2018 at 3:45pm

MKelly   Offline
Senior Member
Helotes, TX

Posts: 508
****
 
Had a great day flying the Me-262 and Scimitar jetcats yesterday.  Pleasing flights from both.

https://www.youtube.com/watch?v=r3Q0muu1-3w&t=9s

Mike
 
IP Logged
 
Reply #26 - Apr 24th, 2018 at 12:46am

Sky9pilot   Online
Administrator
Stick & Tissue
Kelso, WA 98626 USA

Posts: 9680
*****
 
Well done...looks like you've really got her trimmed out!  She transitions well from the launch power to glide and the glide looks really flattened out from the first video!  Just outstanding!!! 

Now I've got to build another catajet!
Tom
 

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
IP Logged
 
Reply #25 - Apr 24th, 2018 at 12:14am

pb_guy   Offline
Senior Member
So I'm just a kid at heart.
Youbou, BC, Vancouver Island

Posts: 1143
****
 
Great looking flights!
ian
 
IP Logged
 
Reply #24 - Apr 23rd, 2018 at 10:58pm

MKelly   Offline
Senior Member
Helotes, TX

Posts: 508
****
 
 
IP Logged
 
Reply #23 - Apr 22nd, 2018 at 7:36pm

Sky9pilot   Online
Administrator
Stick & Tissue
Kelso, WA 98626 USA

Posts: 9680
*****
 
Because the power launch looks so good you might just add a smidge more weight in the nose to avoid the stall in the glide.  Might work, might not.  Always a challenge in trimming catajets!
Tom
 

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
IP Logged
 
Pages: 1 2 3 
Send Topic Print