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Old Nov 06, 2007, 09:22 PM
I enjoy the voices
Lead Wings's Avatar
Perth, Australia
Joined Apr 2007
484 Posts
Lightweigth E-SPADs

I have been posting some details on this other thread - may answer some of the questions.

http://www.rcgroups.com/forums/showt...=672517&page=4

For plans, I just download 3-view plans I find on the web then scale/zoom up on the photocopier till they match the wingspan I want - which is usually a function of the size of piece of coro I have available.

In general the planes all have 50-60 g 150 W brushless outrunners, with kV of 1000 to 1600. ESC around 18A.

I was running all the same size battery for a while - 2S 10C 1800 mAh (90 g) - and found that with a 1200 kV motor, 1080 GWS prop I could get around 400g thrust - plenty for a pretty sporty plane (close to 1:1 thrust to weight).

I have since moved up to some 3S 20C 1300 mAh batteries (130g), and on these with a 8060 or 947 the motors are putting out around 500-600g thrust - so for a 400g plane you get healthy vertical.

I play with the motor kV/prop combos depending on what I want the plane to do - 1000 kV with nice big prop (10x4.7 or 10x8) for 3D, then the higher kV/smaller prop if I want speed.

Good thing is you can get a 150w outrunner for $13 from the web here in OZ these days, and one manufacture we have found make the same motor with different windings in 900, 1200, 1500 and 1800 kV - so you can swap the motor by just loosening the grub screws on the mounting plate, put a different kV motor and prop on and you have quite a different plane!
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Old Nov 07, 2007, 12:19 AM
I enjoy the voices
Lead Wings's Avatar
Perth, Australia
Joined Apr 2007
484 Posts
Cub Combo

Sorry Smooth,

Realise I didn't answer your question.

The cub has a short undercarrage, so can't handle a big prop. I also purposefully underpowered it as it is intended to be an airelon trainer, so I didn't want it flying fast.

So the final combo I used was a 1800 kV outrunner, APC 5.25x4.75 propo and 2S 1800 mAh Lipo - giving around 146g thrust.

More than enough for a slow flying plane with a flying weight of 330 g and a 800 mm wingspan.
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Old Nov 09, 2007, 08:42 PM
Twistaholic AMA 134406
Dad_Roman's Avatar
USA, TX, Teague
Joined Jul 2007
5,771 Posts
Spadtothebone...ST51...nuff said


.
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Old Nov 10, 2007, 08:51 AM
Hack of all trades...
Smooth Spanky's Avatar
Detroit, Michigan
Joined Oct 2004
371 Posts
Lead Wings: Thanks for the info, much appreciated.

Dad Roman: Nice lookin' bird, how does she fly?

Smooth
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Old Nov 24, 2007, 11:36 AM
Registered User
akelelias's Avatar
United States, TX, Fort Worth
Joined May 2006
113 Posts
Where can i get square tubes for fuselage. I could not find any here in texas. i looked at home depot and lowes, appreciate any help. thanks
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Old Nov 24, 2007, 12:02 PM
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balsabuster2004's Avatar
Washougal, Washington, United States
Joined Jan 2004
1,390 Posts
Square downspout

I got mine at Ace Hardware.
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Old Dec 01, 2007, 08:23 PM
Registered User
Carrollton. TX
Joined Jan 2005
15 Posts
Quote:
Originally Posted by akelelias
Where can i get square tubes for fuselage. I could not find any here in texas. i looked at home depot and lowes, appreciate any help. thanks
If you find your way to Plano, or Dallas, check out Elliot's Hardware. They have 10 foot lengths of the 2 1/2" square for about $12
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Old Dec 07, 2007, 11:38 PM
aclosedmouthgathersnofoot
freeble's Avatar
Mansfield, Vic, Aust
Joined Aug 2007
228 Posts
my spad

This is my first attempt at Spading, still got work to do but not bad so far. Apparently the Canadian guttering you guys use is near impossible to find here in Oz so I had to use 1/2mm aluminium for the side wall and balsa for the top and tail to keep the weight down.
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Old Dec 17, 2007, 11:50 AM
Twistaholic AMA 134406
Dad_Roman's Avatar
USA, TX, Teague
Joined Jul 2007
5,771 Posts
Quote:
Originally Posted by Smooth Spanky

Dad Roman: Nice lookin' bird, how does she fly?
Hey Spanky, sorry for the slow reply. Didnt subscribe for some reason.

This was a club project, and truth be known, she ended up flyin horribly. We were very dissappointed. We patterned off of an Extra profile and the wing was to far back for spad construction....didnt realize it till it was to late Will fix on the next one

Everything else worked pretty well.
Blue foam composite fuse.
Blue foam wing ribs (6) to get that nice profile wing shape.
Oversized surfaces worked well. (keep yer speed down )
Thick chord had great ultra low speed handling.

.
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Old Jan 13, 2008, 10:01 AM
Registered User
Joined Oct 2006
76 Posts
Here's a list of my past and current fleet that I already have uploaded:

The Awesome

The short lived Triple Awesome

The DIO

USS

The flying kite wing I callThe SPAGallo

The yet to be flownBF 109


The Wasp

Kozuka


Tailess Kozuka (The strings are just there until the glue set)

The XLPBF
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Old Jan 13, 2008, 08:38 PM
Hack of all trades...
Smooth Spanky's Avatar
Detroit, Michigan
Joined Oct 2004
371 Posts
GINMF...took me a second to figure that out. 'Sup gravity?

You really have to get that 109 up...that thing is a BEAUTY!

Smooth
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Old Jan 13, 2008, 10:10 PM
Registered User
Joined Oct 2006
76 Posts
Yeah, it probably is a bit confusing. Sadly, Gravityisnotmyfriend is too long of a username here.

The 109 is ready to go. I just gotta wait for the snow to melt.
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Old Jan 18, 2008, 04:42 PM
Registered User
Joined Oct 2007
5 Posts
Correx Funjet

Using the mugi.co.uk principle, but folding a much flatter Vee and cutting wing shapers rather than a triangle gives exc flight characteristics. Also use only staples down trailing edge plus 2" package tape here and there to hold the thing together, balsa wing spars taped in pace, CF rod cable tied lengthwise underneath as strengthener, gives rapid build and excellent >1:1 power:weight ratio. Fine behaviour in full power dives. docile at low speed.
1300 3S1P, 2900kv 28-35 inrunner (Hextronic), Gunther 125 x 110 pushon prop, are a great match for powertrain. AUW 400 - 450g.
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Old Jan 19, 2008, 08:44 AM
Registered User
Joined May 2004
44 Posts
Oh man, I like the BF 109, you need to bring that out to SF !
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