Breeze F3P - RC Groups
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Jun 10, 2006, 07:26 PM
Watts is where its at!
racerxky's Avatar
Build Log

Breeze F3P


Here are the plans for my new Airplane. I haven't built one yet (I just finished with the plans) but will try to get it done this week. But in the spirit of release early and release often the plans are now available"

Breeze F3P Plans Page

The plans are made available under a Creative Commons license. So whats the deal with that? Well when you publish something in the US you automatically get copyright to it. This stops people from legally building on your work. The license lets you make modification to the plans as you see fit. You can go into business selling kits if you like. All that without ever asking me permission. All the license requires you to do in return is to make your derivative plans available under the same license.

This is version 0.1 so its likely got some issues and will need fixing. I am not a Aeronautical Engineer so I make no guarantees about exactly how it will fly. That said it should be in the ballpark.
Last edited by racerxky; Aug 15, 2006 at 03:49 PM.
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Jun 10, 2006, 07:27 PM
Watts is where its at!
racerxky's Avatar
Here is a pic of the plans:
Jun 10, 2006, 07:36 PM
Watts is where its at!
racerxky's Avatar
Cut away of the nose section showing construction detail:
Jun 10, 2006, 08:14 PM
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matchlessaero's Avatar
Very nice drawings Racer!
Jun 10, 2006, 09:48 PM
Watts is where its at!
racerxky's Avatar
Thanks!

I did it all in Sketchup. Mad props to Sketchup, its so easy to use. I always wanted to design airplanes as a kid but didn't have any kind of CAD software so this rules.

Specs:
Length: 920 mm
Span: 862 mm
Wing Area: 29.76 dmē
Side Area: 14.28 dmē
Aspect Ratio (Sē/A): 4.99
Target Weight: 180g
Wing Loading: 6.0 g/dmē

Direct plan links for the lazy:

PDF
Sketchup
DXF
Last edited by racerxky; Aug 15, 2006 at 03:51 PM.
Jun 11, 2006, 05:50 AM
PB #2212
looks a babe mate the only problem i think is the rudder is a ilttle bit too tall maybe gettin rid of some of the top of the vertical stabe and then replacing with rudder thus shortening the rudder will make it look tonnes better.

apart from that i really like it i recently designed my own little F3A / F3P pattern plane and im hoping to build 5 of them this week :O and then test them to hell like you will to the Breeze ! ! ! !

well done mate

dan
Jun 11, 2006, 05:54 AM
PB #2212
my own design plans below

dan
Jun 11, 2006, 09:07 AM
Watts is where its at!
racerxky's Avatar
Thanks very much. Your plan looks sharp too.

I made the rudder tall on purpose. The Troll had some nasty yaw-roll coupling; applying rudder caused the airplane to roll into the turn. I needed a lot of opposite aileron to compensate. I just used the 'looks right flies right' method and made sure the elevator area was slightly larger than the rudder.

If I get the opposite coupling then I'll just chop the rudder down until it goes away and change the plans accordingly. Wont know till I get one built.
Jun 11, 2006, 02:14 PM
PB #2212
oki doki i was just saying wat the only thing i thought looked weird was

when you building yours ? whats the best motor on the market i would be able to get either in the U.K or shipped? i have a 20g cd-rom motor and i run that on a 8*4.3 at 6amps is that pretty good ?

dan
Jun 11, 2006, 02:34 PM
Watts is where its at!
racerxky's Avatar
Hey, the whole point of an open process is to get feedback so this is good.

20g is a good weight for the motor. I will be using an Axi 2204/54 which weighs 26g with integrated motor mount and prop saver. I wouldn't go any heavier than that. I believe the Axi motors come from that side of the pond as do the Cyclones and the MicroRex motors. Lots of good choices over there some weigh as little as 12g. Look for a battery that weighs about as much as your motor. My web page has most of this info on it already. Also look in this forum there are good discussions on motors, batteries, servos etc.

I'm cutting mine up as we speak.

If anyone has a good way of producing tiled plans from that PDF please let me know. It would be a big plus if it was free software.
Jun 11, 2006, 03:02 PM
PB #2212
cool

post some pics please as you go

dan
Jun 12, 2006, 11:06 AM
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Mister UHU's Avatar
Quote:
Originally Posted by racerxky

If anyone has a good way of producing tiled plans from that PDF
please let me know. It would be a big plus if it was free software.
I don't know the proper way to do it,
but my printer software allows me to do tiles.

That cut-away drawing is super, great work.
Jun 12, 2006, 11:30 AM
Watts is where its at!
racerxky's Avatar

A few things


PDF
I can print tiles from Adobe Illustrator but I would need the PDF distiller to create a PDF from that in paged format. I don't own either of those programs. Also this method wont get you the alignment marks that makes it easy to put the pages back together. At least with the large format PDF you can go to a print shop and get a plan printed. I have seen some very nifty tiled plans with alignment marks, like the Troll plans have.

Tail Surfaces
After doing the cut outs the tail surfaces do look a bit on the small side. There should be a formula that relates the size of the moveable tail surfaces to the wing area and distance from the surface hinge line to the CG. There is probably a rule of thumb that goes along with this about what the ratio is for 3D aircraft.

Something like this. Not sure what volume coeficient I should aim for though. Any suggestions?

Pictures
Im on it, my ISP crapped out my upload last night so I will try again tonight.
Jun 12, 2006, 12:08 PM
PB #2212
so racerxky any pics yet

dan
Jun 12, 2006, 11:39 PM
Watts is where its at!
racerxky's Avatar
Got the parts cut out and started in on the fuse assembly. I'm taking my time with this one.

Did the math for the Tail Volume Coefficient. The surfaces are a bit small but not that bad. I got it fixed in the plan. Also the servo tray needs to be a bit higher up to clear the landing gear blocks. Fixed that too.

She is BIG, probably too big for the gym we fly in.


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