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Foamies Talk about building, power setups and anything having to do with e-powered foamy planes!

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Old 04-19-2013, 07:32 AM   #1
Dragon Master
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Default Building my first foamy

Hi
I started to build my first foamy
it is 36 in long with a 60 in wing span

the wings almost look to long

here is a pick that i covered 6 in of each wing


hoping it will fly when i get it done
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Old 04-19-2013, 09:29 AM   #2
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Those are some crazy long wings! Are you using plans, or your own design, or ...?

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Old 04-19-2013, 09:34 AM   #3
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Very Nice Use some Square CF tube in the wing for a brace and Epoxy it in place, I Like using a Slow Stick Fuselage to brace my larger wing builds, The wing Looks Great, depending on what type of flying you want to do, leave the wing as is or cut it, a long wing will give you longer flights if you like to thermal, and a shorter wing will give you some better speed, I get to do the Maiden Flight on it Take care and have fun, Chellie

here are some of my scratch builds if your interested.

http://www.wattflyer.com/forums/show...652#post715652

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Old 04-19-2013, 09:45 AM   #4
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Originally Posted by Dragon Master View Post
Hi
I started to build my first foamy
it is 36 in long with a 60 in wing span

the wings almost look to long

here is a pick that i covered 6 in of each wing


hoping it will fly when i get it done
It Will Fly Great when your done with it, put the CG at 25% of the wing cord from the leading edge, Do You know what motor you are going to use, if not, Here is a motor from Heads up Rc. use a 12x6 prop on 3 cells.
give the motor a little down thrust like about 3 percent.

http://www.headsuphobby.com/Power-Up...otor-E-585.htm


http://www.wattflyer.com/forums/showthread.php?t=39483

I may be getting Older, But I Refuse to grow Up I am Having to much Fun to Grow Up LOL
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Old 04-19-2013, 10:35 AM   #5
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You have a nice start there!

My only concern is with the size of your fin/rudder and stab/elevator. It may just be the picture making them look a bit small. If they are not large enough you will have control problems with the model.

If you could, give us the total area of the wing - or its dimensions as well as the area of the tail feathers.

Then we can tell you if they are large enough to work well.

I think I need a signature.
Larry
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Old 04-19-2013, 11:39 AM   #6
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It is perfectly possible to fly big wings with a small tail
but it will probably be very tricky to control and keep in the air.
Click image for larger version

Name:	Fin15sep12.JPG
Views:	30
Size:	49.1 KB
ID:	167963
This certainly is but it is very light so flies pretty slowly.

How much will it weigh?
Its weight will determine how fast it has to fly and the faster it flies the less time you have to get it back under control before it hits the ground!

A reduced span will improve the control but less area will mean it flies faster.
You have to find a suitable compromise.

Do let us know how you get on


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Old 04-19-2013, 05:29 PM   #7
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Originally Posted by mclarkson View Post
Those are some crazy long wings! Are you using plans, or your own design, or ...?
This is my own plan just trying to go of a pic
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Old 04-19-2013, 05:36 PM   #8
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Originally Posted by CHELLIE View Post
It Will Fly Great when your done with it, put the CG at 25% of the wing cord from the leading edge, Do You know what motor you are going to use, if not, Here is a motor from Heads up Rc. use a 12x6 prop on 3 cells.
give the motor a little down thrust like about 3 percent on a 3 cell lipo 3300 mah.

http://www.headsuphobby.com/Power-Up...otor-E-585.htm


http://www.wattflyer.com/forums/showthread.php?t=39483
the motor i was going to use is turnigy Park 480 brushless outrunner with a 11x8 prop
http://www.hobbyking.com/hobbyking/s...dProduct=22636
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Old 04-19-2013, 05:55 PM   #9
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Originally Posted by Larry3215 View Post
You have a nice start there!

My only concern is with the size of your fin/rudder and stab/elevator. It may just be the picture making them look a bit small. If they are not large enough you will have control problems with the model.

If you could, give us the total area of the wing - or its dimensions as well as the area of the tail feathers.

Then we can tell you if they are large enough to work well.
wing area is 450 sq in
ailerons 60 sq in each

fin/rutter total area 40 sq in the rutter itself is 19 sq in
stab/elevator total area 76.5 sq in. The elevatos are 20.5 Sq in each

this may be a better pic of tail feathers

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Old 04-19-2013, 06:22 PM   #10
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Looks like one of my old school pattern planes and i like the full airfoil wing. joe
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Old 04-19-2013, 06:33 PM   #11
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Originally Posted by quorneng View Post
It is perfectly possible to fly big wings with a small tail
but it will probably be very tricky to control and keep in the air.
Attachment 167963
This certainly is but it is very light so flies pretty slowly.

How much will it weigh?
Its weight will determine how fast it has to fly and the faster it flies the less time you have to get it back under control before it hits the ground!

A reduced span will improve the control but less area will mean it flies faster.
You have to find a suitable compromise.

Do let us know how you get on
estimated flight weight will be around 32.oz (907 g)

so best of to leave the wings at the length they are at now, as i can always cut them shorter later it i want more speed
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Old 04-19-2013, 06:49 PM   #12
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Should fly great.....looks a little like the:

http://twistedhobbys.com/Telink-48-E...k-Multifun.htm

I've flown the Telink....yours, at 32oz, (a bit heavier) may have some of the same characteristics, great glider and forgiving stall's..........!

AMA 928214
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Old 04-20-2013, 12:46 AM   #13
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Originally Posted by Dragon Master View Post
wing area is 450 sq in
ailerons 60 sq in each

fin/rutter total area 40 sq in the rutter itself is 19 sq in
stab/elevator total area 76.5 sq in. The elevatos are 20.5 Sq in each

this may be a better pic of tail feathers


Those numbers look close enough for me

I think I need a signature.
Larry
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