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Old May 16, 2010, 07:01 PM
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Pushit 3 S8E/P model

New pics of the (almost) finished model I plan to fly this summer in Serbia are below. Almost in that I still have to do the fairing under the wing. I got in a bunch of hi-starts today to trim and its tracking pretty good. I didn't want to thermal it as I'm still checking range on the new 2.4 Hitec module in my Evo and optima 6 rx (which is looking very good btw). I was able to copy the program I used on previous models and then quickly make minute adjustments for boost, range, thermal, flap, snap-flap, inside turn washin and crow modes...to name a few

This model is 280 sq. in and weighs less motor casing, 210g. Again, its 6
servos like the others-(4) in the wing for the flaps/ailerons and one for the stab/rudder. New on this model is the pod which was bladder molded in female molds as well as a new wing planform and custom airfoils. The wing
cores were cut by FlyingFoam. This wing has zero sweep also which makes it different from the older versions. I designed the whole model in large part using Mark Drela's AVL program.

Next, I decided to go with glass wings on this one (1.4 oz on a bias and 3/4 oz at 0/90 on top). The hinge goes the length of the wing on the bottom and is nylon peel ply w/o the teflon. I REALLY prefer working with glass over kevlar-its so much easier to finish off.

Last is that the wing uses Osaka tissue on the bottom for coloring. Here I
transferred the already cut tissue to the mylars and then applied the glass
layers on top. Doublers for the (4) servo cutouts were applied directly to the
core. I've got the bagged layup technique down where my wings require very
little LE touch up aside- here I can finish the LE's up in around 15 minutes and
then I swipe on a bit of epoxy with my finger to give it that shiny finished
look.

Kevin K.
USA S8E/P team 2010
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Last edited by kkooch; May 16, 2010 at 10:12 PM. Reason: typo
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Old May 17, 2010, 11:13 AM
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St Catharines Canada
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Sweet. I wish I had your skills. Are you gong to GLC?

Richard
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Old May 17, 2010, 11:33 AM
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WoW! very nice.


John Fruge
Madera, CA
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Old May 17, 2010, 08:04 PM
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Originally Posted by The Tellurian View Post
Sweet. I wish I had your skills. Are you gong to GLC?

Richard
Thanks for the compliment Richard. Yep, I'll be there with my daughter Paige who is on the jr team flying streamer.

Kevin K.
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Old May 21, 2010, 12:01 PM
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Nice job Kevin. Looks great.

Dimitre
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Old May 22, 2010, 11:50 AM
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Madera, California, United States
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Guys, what is the max wingspan on an S8E model. I did some searching but came up with nothing.

Thanks,

John Fruge
Madera, CA
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Old May 22, 2010, 09:45 PM
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It is not max size it is min 1.1 m and 300 gram max weight fully loaded.
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Old May 24, 2010, 11:45 AM
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Dimitre, thanks for the info.

Kevin, sorry for the sort of off topic hijack

John Fruge
Madera, CA
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Old May 24, 2010, 09:24 PM
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Originally Posted by kkooch View Post
...Last is that the wing uses Osaka tissue on the bottom for coloring.
What a great tip, thanks for the idea! Good luck in Serbia... if she flies even half as good as she looks you should have a winner on your hands.

Just curious... why the change in motor pod design from Pushit 2?

Regards,

straitup
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Old May 28, 2010, 11:50 PM
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Originally Posted by straitup View Post
What a great tip, thanks for the idea! Good luck in Serbia... if she flies even half as good as she looks you should have a winner on your hands.

Just curious... why the change in motor pod design from Pushit 2?

Regards,

straitup
Well, first and foremost, better access to the servos and rx here. Second (though I question) is lower drag during glide. Its probably a bit lower than pushit 2 glide drag which makes the primary reason a reason to go in this direction

KK
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Old Jun 03, 2010, 09:40 AM
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Pompano Beach, FL.
Joined Aug 2008
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Hello,

Are your push rods on the flaps and ailerons internal or just not installed yet? and also why are they at an angle instead of at 90 degs. to the control surfaces? Looks very nice BTW, and 300gs should fly great!

See ya, Rockitglider
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Old Jun 05, 2010, 11:23 AM
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Originally Posted by Rockitglider View Post
Hello,

Are your push rods on the flaps and ailerons internal or just not installed yet? and also why are they at an angle instead of at 90 degs. to the control surfaces? Looks very nice BTW, and 300gs should fly great!

See ya, Rockitglider
No pushrods in the wing. I'm using RDS (servos/torque rod/pocket are all inside the wing).

Oh...and its 215 grams, not 300g!

Thanks for the compliments,

KK
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Old Jun 05, 2010, 02:35 PM
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Pompano Beach, FL.
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Hello Kkooch,

I don't know what RDS means, is there some way for me to learn about this like is there a search term to use to find info? Thanks,

Rockitglider

Edit: I found it

http://www.irfmachineworks.com/rds/

Pretty cool, I'll have to research more on it, I like them very clean, how do they work, is there any binding?
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Old Jun 05, 2010, 04:04 PM
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Pompano Beach, FL.
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Hello again Kkooch,

If you don't mind, what size & angle RDS did you use for this plane? Thanks,

Rockitglider
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Old Jun 05, 2010, 05:27 PM
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Originally Posted by Rockitglider View Post
Pretty cool, I'll have to research more on it, I like them very clean, how do they work, is there any binding?
No binding whatsoever. The key is taking your time to make accurate pockets that are exactly the thickness of your wiper wire so that there is no play. This type system WILL take perhaps triple the time that a simple cf control rod setup to make...but I think the clean lines are well worth it.

My RDS setup is exactly like that used in Mark Drela's SuperGee II design. See here: http://charlesriverrc.org/articles/s...G2/sg2_rds.pdf

Regards,

Kevin K.
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