Cox Engines Forum
You are not logged in! Please login or register! Guests are limited to posting in the "General Questions (Guest Posting Allowed)" section only. Becoming a member is fast, easy and FREE!


Log in

I forgot my password

Search
 
 

Display results as :
 


Rechercher Advanced Search

Cox Engine of The Month
November-2017
MauricioB's

"Cox Tee Dee .010"



PAST WINNERS
Speed Contest 2018
CEF Traveling Engine

Gallery


Win This Engine!
The Traveling Prop
World of Aviation

plane size for cox .09

View previous topic View next topic Go down

plane size for cox .09

Post  coxaddict on Tue Aug 04, 2015 4:14 pm

Hi CEF members,

I want to scratch build a plane suitable for simple loops and inverted flight and maybe some figure eights.  I have some Cox .09s both TDs and Medallions and want to build planes for them.  Would a wing area of about 135 square inches be too small? I have some 3/4"x 1/2" leading edge material that would make  nice thick airfoil with this size plane. Any  ideas would be greatly appreciated.

Agustin Jr.
avatar
coxaddict
Gold Member
Gold Member

Posts : 163
Join date : 2013-01-27
Location : north shore oahu, Hawaii

View user profile

Back to top Go down

Re: plane size for cox .09

Post  modelbuilder49 on Tue Aug 04, 2015 4:42 pm

coxaddict wrote:Hi CEF members,

I want to scratch build a plane suitable for simple loops and inverted flight and maybe some figure eights.  I have some Cox .09s both TDs and Medallions and want to build planes for them.  Would a wing area of about 135 square inches be too small? I have some 3/4"x 1/2" leading edge material that would make  nice thick airfoil with this size plane. Any  ideas would be greatly appreciated.

Agustin Jr.
Please don't be upset with me for the way this answer may read but there are oh so very, many examples to choose from that the only truth is to pick something you think is the koolest! The selection of materials from balsa wood to bass to corrugated plastic to foam also makes the suggestions nearly endless. The key lies in what materials you have available to you and what is your skill level which alone could range from not knowing which end of the knife to hold to master carpenter/craftsman on your first build.

If you're truly wanting to "scratchbuild" I suggest looking at the plans offered on Outerzone.com, sorting by engine size and start with the one you think looks the koolest. Or go to the Annual Worldwide Ringmaster Fly-A-Thon on Facebook and download these plans: https://www.facebook.com/groups/RingmasterFlyAThon/743353172355310/ then get ready to have some fun and participate in the annual Fly-a-thon!!

Jim
avatar
modelbuilder49
Silver Member
Silver Member

Posts : 93
Join date : 2013-09-12
Age : 68
Location : Titusville Florida

View user profile

Back to top Go down

Cox 09

Post  RK Flyer on Tue Aug 04, 2015 5:10 pm

The small version of the "All American" for the 09 is a great stunt flyer. The wing span is 26" & 140 sq. inch. It has the built up wing & fuse. The Plans are on Outerzone.com

RK Flyer
avatar
RK Flyer
Gold Member
Gold Member

Posts : 250
Join date : 2013-07-16
Location : Somerset, Kentucky

View user profile

Back to top Go down

Re: plane size for cox .09

Post  JPvelo on Tue Aug 04, 2015 7:08 pm

I ended up putting a TD .09 on this to deal with the tail heavy condition and mostly to see how fast it would go. At 24" span and around 140-150 squares it flew much better than it had a right to.
avatar
JPvelo
Diamond Member
Diamond Member

Posts : 1925
Join date : 2011-12-02
Age : 50
Location : Phoenix

View user profile

Back to top Go down

Re: plane size for cox .09

Post  larrys4227 on Tue Aug 04, 2015 7:59 pm

Very nice!! What size nut is that?? Wink
avatar
larrys4227
Gold Member
Gold Member

Posts : 338
Join date : 2015-07-23
Location : Lakeland, FL

View user profile

Back to top Go down

Re: plane size for cox .09

Post  JPvelo on Tue Aug 04, 2015 8:17 pm

larrys4227 wrote:Very nice!!  What size nut is that?? Wink

Big!  Not sure, it was setup like that a while ago. That's a TD .049 in the photo, the nut came of when I installed the .09. The plane was destroyed when the ballon tank I was using failed just before the top of a loop.

Jim
avatar
JPvelo
Diamond Member
Diamond Member

Posts : 1925
Join date : 2011-12-02
Age : 50
Location : Phoenix

View user profile

Back to top Go down

Re: plane size for cox .09

Post  coxaddict on Tue Aug 04, 2015 8:28 pm

Thanks for all your replies.  I was finishing up on my modified Sig Akromaster build when it hit me! I need to build some planes for my Cox .09 engines.
 My Akromaster is entirely scratch built using templates I made of 1/4" plywood for the wing ribs. The leading and trailing edges are balsa stock as is the 1/4" spars. This was one of the easiest designs for me as everything locked in place without glue allowing perfect alignment.  The wing was lengthened by 2 ribs and moved forward on the fuselage which was also lengthened 3/4" at the tail.  This was all done as suggested on this forum to help it balance  and fly better with a Fox .15 Schneurle engine.
I just didn't know where to start designing my .09 sized planes. I will definitely check out the websites mentioned.
Mahalo
Agustin Jr.
avatar
coxaddict
Gold Member
Gold Member

Posts : 163
Join date : 2013-01-27
Location : north shore oahu, Hawaii

View user profile

Back to top Go down

Re: plane size for cox .09

Post  Cribbs74 on Tue Aug 04, 2015 8:35 pm

Good looking plane Agustin.
avatar
Cribbs74
Moderator

Trusted Seller
Posts : 9531
Join date : 2011-10-24
Age : 43
Location : Tuttle, OK

View user profile

Back to top Go down

Re: plane size for cox .09

Post  coxaddict on Tue Aug 04, 2015 8:55 pm

Thanks,
By the way, the wing covering is laminating film, spray painted on the glue side. I got that tip on one of the forums can't remember which one but the gentleman who posted it did all the trial and error. Now I can have any color at my disposal, and it works with most type of paints. Prior to this I was painting the covering on the outside needing a clear coat to bring out the gloss.

Mahalo
Agustin Jr.
avatar
coxaddict
Gold Member
Gold Member

Posts : 163
Join date : 2013-01-27
Location : north shore oahu, Hawaii

View user profile

Back to top Go down

Re: plane size for cox .09

Post  Sig Skyray on Wed Aug 05, 2015 8:34 am

Gald you asked, Agustin. I have 3 .09's without planes but not ready to scratch build yet. Looking for a kit.

Outerzone's site is http://outerzone.co.uk

Greg
avatar
Sig Skyray
Gold Member
Gold Member

Posts : 222
Join date : 2015-04-02
Age : 56
Location : Lake Mary, FL

View user profile

Back to top Go down

Re: plane size for cox .09

Post  Sig Skyray on Wed Aug 05, 2015 8:36 am

JPvelo wrote:I ended up putting a TD .09 on this to deal with the tail heavy condition and mostly to see how fast it would go. At 24" span and around 140-150 squares it flew much better than it had a right to.

Love the inverted gull wing design. Stealth-looking badass model! Have the plans Jim?

Greg
avatar
Sig Skyray
Gold Member
Gold Member

Posts : 222
Join date : 2015-04-02
Age : 56
Location : Lake Mary, FL

View user profile

Back to top Go down

Re: plane size for cox .09

Post  getback on Wed Aug 05, 2015 12:23 pm

Here's another site not to many talk about but have a lot of good downloads , Free but you will have to join they also have a forum with a lot of good time people that also share there plans and ideas ..  http://www.hippocketaeronautics.com/hpa_plans/index.php  I am wanting to build this sometime in the future  http://www.hippocketaeronautics.com/hpa_plans/details.php?image_id=4299&mode=search ERic Very Happy
avatar
getback
Top Poster
Top Poster

Posts : 4272
Join date : 2013-01-18
Age : 60
Location : julian, n.c.

View user profile

Back to top Go down

Re: plane size for cox .09

Post  batjac on Wed Aug 05, 2015 6:41 pm

coxaddict wrote:Thanks for all your replies.  I was finishing up on my modified Sig Akromaster build when it hit me! I need to build some planes for my Cox .09 engines.
 My Akromaster is entirely scratch built using templates I made of 1/4" plywood for the wing ribs.

If you have templates for the Akromaster, why not just scale them down to a wing with a span of 25-27 inches?

The Scalable Mark
avatar
batjac
Diamond Member
Diamond Member

Posts : 1447
Join date : 2013-05-22
Age : 54
Location : Portland, OR, USA

View user profile

Back to top Go down

Re: plane size for cox .09

Post  JPvelo on Wed Aug 05, 2015 6:55 pm

Sig Skyray wrote:
JPvelo wrote:I ended up putting a TD .09 on this to deal with the tail heavy condition and mostly to see how fast it would go. At 24" span and around 140-150 squares it flew much better than it had a right to.

Love the inverted gull wing design.  Stealth-looking badass model!  Have the plans Jim?

Greg

Thanks Greg!

No plans, I just scratch built from a set of F2G Super Corsair drawings. Download three views from the internet and blow them up to the size you want at a copy shop.

Here's a cheat sheet for the wing angles:


If you like corsairs keep an eye on this thread, it should be flying on Friday.

https://www.coxengineforum.com/t8308-f2g-for-15-carrier

Okay, I'm done hijacking now. Sorry.

Jim
avatar
JPvelo
Diamond Member
Diamond Member

Posts : 1925
Join date : 2011-12-02
Age : 50
Location : Phoenix

View user profile

Back to top Go down

Re: plane size for cox .09

Post  coxaddict on Wed Aug 05, 2015 7:53 pm

Hi all,
I went to the websites mentioned and downloaded several plans for outerzone to look over. Part of scratch building is using what's available, so it's a matter of what I have in materials. Jim, the Cosair is one of my favorite looking WWII planes, the P-40 and P51D Mustang being the others.
Just watched a documentary on the Cosair and its successes and drawbacks. The down swept wing allowed more ground clearance for the huge propeller driven by a 2,000HP engine. The long nose made it difficult to land on aircraft carriers. Their huge success was in the South Pacific. Thanks for sharing the drawings as I want to build one maybe for the CEF Reed Speed event.

Mahalo!

Agustin Jr,
avatar
coxaddict
Gold Member
Gold Member

Posts : 163
Join date : 2013-01-27
Location : north shore oahu, Hawaii

View user profile

Back to top Go down

Re: plane size for cox .09

Post  cox24711 on Wed Aug 05, 2015 8:05 pm

coxaddict wrote:Hi all,
I went to the websites mentioned and downloaded several plans for outerzone to look over.  Part of scratch building is using what's available, so it's a matter of what I have in materials.  Jim, the Cosair is one of my favorite looking WWII planes, the P-40 and P51D Mustang being the others.  
Just watched a documentary on the Cosair and its successes and drawbacks.  The down swept wing allowed more ground clearance for the huge propeller driven by a 2,000HP engine. The long nose made it difficult to land on aircraft carriers.  Their huge success was in the South Pacific.  Thanks for sharing the drawings as I want to build one maybe for the CEF Reed Speed  event.  

Mahalo!

Agustin Jr,
me Spitfire!!!!!!!!!!!! or hurricane!!!!!! or tempest or boulton paul defiant!!!
avatar
cox24711
Platinum Member
Platinum Member

Posts : 720
Join date : 2014-01-18
Age : 14
Location : Noosa Queensland Australia

View user profile

Back to top Go down

Re: plane size for cox .09

Post  NEW222 on Wed Aug 05, 2015 8:15 pm

coxaddict wrote:Thanks,
By the way, the wing covering is laminating film, spray painted on the glue side. I got that tip on one of the forums can't remember which one but the gentleman who posted it did all the trial and error. Now I can have any color at my disposal, and it works with most type of paints.  Prior to this I was painting the covering on the outside needing a clear coat to bring out the gloss.

Mahalo
Agustin Jr.

Great looking bird there. I was wondering if you could please give a bit more detail on your covering with doculam painted on the inside. Mainly, what type of paint, and did you give it a couple of light coats or was it a couple heavier coats. Was it 'see-through' before applying. I have read a bit about it but have not seen much for pictures besides yours, and I think it looks great.
avatar
NEW222
Platinum Member
Platinum Member

Posts : 1103
Join date : 2011-08-13
Age : 39
Location : oakbank, mb

View user profile

Back to top Go down

Re: plane size for cox .09

Post  Sig Skyray on Wed Aug 05, 2015 8:23 pm

Thanks a lot for those helpful graphics Jim.

Love to see the F2G for carrier you built.
Greg
avatar
Sig Skyray
Gold Member
Gold Member

Posts : 222
Join date : 2015-04-02
Age : 56
Location : Lake Mary, FL

View user profile

Back to top Go down

Re: plane size for cox .09

Post  coxaddict on Thu Aug 06, 2015 1:07 am

[/quote]

If you have templates for the Akromaster, why not just scale them down to a wing with a span of 25-27 inches?

The Scalable Mark[/quote]

That's a great idea Mark, cutting balsa ASAP! I usually cut 3 sets of ribs and I like the Akromaster wing design.

Agustin Jr.
avatar
coxaddict
Gold Member
Gold Member

Posts : 163
Join date : 2013-01-27
Location : north shore oahu, Hawaii

View user profile

Back to top Go down

Re: plane size for cox .09

Post  coxaddict on Thu Aug 06, 2015 2:02 am



Great looking bird there.  I was wondering if you could please give a bit more detail on your covering with doculam painted on the inside.  Mainly, what type of paint, and did you give it a couple of light coats or was it a couple heavier coats.  Was it 'see-through' before applying.  I have read a bit about it but have not seen much for pictures besides yours, and I think it looks great.[/quote]


Thanks for your interest

Grabber Green is Dupli Color engine enamel with ceramic. The blue and orange is Krylon Fusion for plastics. The dark gray is Krylon Hammer tone. So far I've used whatever paint I have available.
I simply measure the wing panel and add four inches all around so you have something to pull on when covering to minimize wrinkles. So cut enough 'lam to make four panels and more if you plan on covering the rest of the plane. Tape the 'lam to a piece of plywood covered with newsprint. This allows you to see how much paint you're applying. I spray about 15 to 18 inches away with large circular strokes until it looks opaque. I feel the heavier pigmented paint is better because you use less paint making it lighter. I had a slight fear that the painted 'lam would not stick but it works great! Just set your sealing iron to the lowest temp that allows the panel to stick without lifting. Shrinks like regular plastic covering.
Mahalo!
avatar
coxaddict
Gold Member
Gold Member

Posts : 163
Join date : 2013-01-27
Location : north shore oahu, Hawaii

View user profile

Back to top Go down

Re: plane size for cox .09

Post  coxaddict on Thu Aug 06, 2015 4:27 am

Forgot to mention to paint on the glue(dull) side. The film becomes clear when heated, allowing the color to stand out.
Thanks
avatar
coxaddict
Gold Member
Gold Member

Posts : 163
Join date : 2013-01-27
Location : north shore oahu, Hawaii

View user profile

Back to top Go down

Re: plane size for cox .09

Post  Oldenginerod on Thu Aug 06, 2015 5:48 am

How does the adhesive work once you paint over it?
avatar
Oldenginerod
Diamond Member
Diamond Member

Posts : 1895
Join date : 2012-06-15
Age : 55
Location : Victoria, Australia

View user profile

Back to top Go down

Re: plane size for cox .09

Post  coxaddict on Thu Aug 06, 2015 2:37 pm

The fact that it works puzzled me at first. I don't know how it works but the paint must react with the glue when heated along with the film shrinking. I think Paint has some bonding agents too. I try to minimize the paint film thickness mostly for weight savings. Like any finish the surfaces must be free of dust and oil, including the film. My original intention was to find a covering that is cheap enough to use on planes that have short life expectancies like combat wings and trainers. I have started to use it on my vintage style stunters which probably will have short life expectancies. lol!

PS a 6 foot roll of Monokote costs $22.00 + tax here.

Mahalo for your interest

Agustin JR.
avatar
coxaddict
Gold Member
Gold Member

Posts : 163
Join date : 2013-01-27
Location : north shore oahu, Hawaii

View user profile

Back to top Go down

Re: plane size for cox .09

Post  Sponsored content


Sponsored content


Back to top Go down

View previous topic View next topic Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum