Large Scale Old Fogey FPV UPDATE

by Battershell | January 13, 2013 | (11) Posted in Just Fun

 

 

 I like big planes and helis. Nothing wrong with that I guess. Just costs more to have fun. So since I liked the Old Fogey Josh came up with. I decided to blow the plans up to the scale I needed. First off let me give you the electronics list I used so you can see the size difference.  

NTM Prop Drive 35-36A 910 350W motor

HXT900 servos

Master airscrew 10 x 4

Turnigy 2200mah 40-50c battery

Turnigy 45 sbec speed controller

This is the stuff I used cause it was just extras on the shelf. Anyone can use whatever they like. My fun was in trying to figure out where the PDF plans needed to be changed to fit my needs. Simply blowing up all the proportions is not going to make a balanced well flying plane. But a did originally add 12.5% to the original dimensions. Then realizing I have some serious weight in the battery (about 209 grams with leads) I widened again the main wing 4 inches to help add lift. Also since there is no way I would be able to tuck a 2200mah battery all the way up front like Josh did with his 500mah, I extended the tail 2.5 inches to add more weight rearward.

Like the fueselage I also had to enlarge the Swappable Pod a bit to handle the weight and size of the motor mount. Not just the front for the motor pod but the entire pod width and height as well.

Well enough Talk. How did it fly? Well Bixlers Plans were sweet and the Maiden was too. Very nice and plenty of power. I love power! She is a slow flyer and a dogfighter when I want her to be. Watch the video and see. I plan on better video soon as the weather clears up a bit. Sorry about the focus and camera issues. I have my 7 year old daughter help me always.  

Let me know with comments if anyone needs anymore details. Always glad to help.

 

p.s.   flying weight is 889 grams. Thrust is 925 grams with 10/6 prop. Wingspan is 46 1/2 inches.

 

This is the cub my rear tail wheel came from. Yes its steerable cause the rod runs through the rudder.

 

 

Here.... That same setup is rebent to fit the Old Fogey.



COMMENTS

lonewolf7717 on January 17, 2013
Well done! These upscale type projects don't always turn out as straight forward as we thought they would be. Bigger dimensions brings with it a whole host of new challenges that sometimes make it hard to stay faithful to the original design. In this case you did a fine job of problem solving a few issues while still ending up with a very clean looking build. How is the control/handling? I only ask because, those control surfaces sure look small for a slow flying bigger plane, aside from that most excellent.
Log In to reply
Battershell on January 18, 2013
The airplane is very responsive to Controls. I have about ⅜ of an inch movement for rudder left to right. And I ended up moving elevator to about ¾ inches from full up to down. Expo is 45% for both. Recently I moved servos to a new mount in the forward half of he tail. Trying to be able to get more weight rear so my batteries cound be further forward for easier connection access. Work well. My motor is 185grams in weight and making nose heavy. Next I am going to shorten the motor mount length and trim the nose fuse a bit to shorten the distance the motor is from CG. This should make it smoother and less snappy when it comes to altitude changes. This is easier than lengthening the tail moving more weight to that end. Does it sound like I can get to my goal?
Log In to reply
nickatredbox on January 14, 2013
Nice job hope mine flys this well
Log In to reply
Mirabile Visu on January 14, 2013
Excellent upscaled design. Well done, and daughter shows great potential as a flight video photographer!
Log In to reply
nickatredbox on February 4, 2013
Whats your take off weight if you don't mind me asking?
Log In to reply
Battershell on February 15, 2013
889g at takeoff
Log In to reply
NoUsername on March 9, 2013
Am interested in how you made the tailwheel steerable? What items did you use in the process?

Log In to reply
Battershell on March 11, 2013
For the tail wheel I used the wire spring, yellow plastic mounting brace from another piper cub basket case. Also some locking spacers and a wheel from du-bros. I will upload a close-up pic soon so look for it in a day or so.
Log In to reply
Battershell on March 13, 2013
Recheck my article. I posted the pics of the tail wheel for you. Happy Landings!
Log In to reply
Battershell on April 23, 2013
Finally some decent weather to fly again!
Log In to reply

You need to log-in to comment on articles.


Large Scale Old Fogey FPV UPDATE