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        Discussion cartoon spitfire

#1 may-day Jun 28, 2009 09:27 PM

cartoon spitfire
 
7 Attachment(s)
Hello all,

I came up with an idea for a cartoon spitfire for a quick build. I looked into the thread about "fatties" and came up with a sketch.

Here is what i have so far and it is not guaranteed to fly so it will be interesting for me to say the least. I hope you guys can get some enjoyment from my attempts at getting this thing right, I sure will. Anywhoo any comments will be awesome.

Dave

#2 Rusty-Gunn Jun 29, 2009 01:17 AM

Looking good, Dave. Spitfires are cool planes.

#3 may-day Jun 29, 2009 09:18 AM

I built a new wing out of cell foam 88 and man what a difference. got the auw to 3 oz without tail feathers and a few tidbits. I am hoping to have no more than 4.5 oz auw.

Pics to follow after a few more additions.

I was thinking about 28 to 30% cg. I guess this would be as good a place to start as any unless anyone can offer some other advice :)

thanks

Dave

#4 may-day Jun 29, 2009 12:17 PM

9 Attachment(s)
need to build the turtledeck and the bottom of the cowl as well as a spinner and canopy. I might add some landing gear to her or maybe not.

#5 Rusty-Gunn Jun 29, 2009 08:30 PM

Looking good.

#6 may-day Jun 29, 2009 09:00 PM

8 Attachment(s)
an update, I will probably have a canopy and spinner done later tomorrow. later tonight i would like to have the ailerons all buttoned up and the kfm upper airfoil skin on.

will start sanding the fuse and control surfaces tomorow.

#7 Rusty-Gunn Jun 29, 2009 09:09 PM

Do the torqure rods, going through the horn holes like this, work out well? Wouldn't they pull on the torque rods as the horns turn? I'm unsure how they work this way. Thanks.

#8 may-day Jun 29, 2009 09:14 PM

I have only seen this done before.This is my first attempt at it Rusty. One thing i have noticed is that all portons of the torque rod and rod sleeve need to be tight without slop. Any motion other than clean forward and back motion causes the ailerons to throw different degrees. If i do not like it i will go with a traditional pushrod method.


If anyone is interested I can have some cheapo plans drawn up from microsoft paint with basic dimensions.

more pics and updates later.
Dave

#9 Rusty-Gunn Jun 29, 2009 09:36 PM

I figure, with the Spitfire being a popular plane, some will ask for plans.

#10 larryross Jun 29, 2009 11:57 PM

may-day

If you do plans I would help you out and make some vectored drawings from them. I have done this for Rusty a time or two before.

Larry

#11 springer Jun 30, 2009 09:28 AM

relative to the aileron wires in the control horns, I've been considering that too, will be interesting to see how it works for you. Might try "countersinking" the holes so that the wire can easily pivot in the hole, rather than trying to bend, unless you already have some slop in the fit.

#12 may-day Jun 30, 2009 10:48 AM

Springer- countersinking is a great idea. I willbreak out my dremel tool. Ive been looking for a reason :D

Larry- I would appreciate that enourmously. Please allow me to get to a more final version before using your skills. :)

I will have some more posted pictures of progress later this evening. Thanks for your input and ideas fellas.


Dave

#13 may-day Jul 05, 2009 06:11 PM

So after a few days off of building i have came back with a few ideas. I have the aircraft in testbed position. It flew across the backyard under power nice and straight with no rudder, no aileron, only elevator and throttle. I had noticed a few places i could have made lighter and better uses of bulkheads and such.

Version 2 is fully under way even though version 1 isnt finished. I dont think version 1 ever will be finished but will be retired to hang from my sons room ceiling.

I have a few pictures but its only of the plans on the foam with no cuts. The wing saddle will be redisigned to accomidate built up formers. I have not decided on how to attach the wings yet but it will either be bamboo skewers and rubber bands or popsicle sticks and magnets.

I am happy to have seen version 1 fly across the backyard. It proved that the airframe is capable of flight in its present configuration. The 10 gram hobbyking motor appears to have the grunt to pull this plane. I have the turnigy 6 amp esc and the web site says not to run on 3 cells so i am only using a rhino 360 2 cell. I was worried that 7ish volts was enough and i guess it is. Once i have it fully maidened i guess ill be the judge of the ability of the 10 grammer.

Ill try to have a few more pics posted in the next day or so.

Thanks
Dave


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