I have the following electronics:
Motor: Turnigy 2826 1400kv
ESC: Turnigy Plush 40A
Batteries:
2x Turnigy Nanotech 950mah 25-50C
2x Turnigy 2200mah 20C
I wanted to build a plane using Coroplast that could fly with the 2826 motor and carry the 2200mah battery.
So, thanks to Sanjay Rai Sir and Girish Sir, I decided to make a 90% AviSpad.
Proposed dimensions:
Wingspan: 42 inches
Chord: 9 - 9.5 inches
Length of Fuse: 33 inches
I want to try and keep the All-Up weight of the plane (including a battery of 180g) to not more than 800g.
I have 3mm and 5mm coro. I plan to build everything using the 3mm coro, except the spar and formers for which I shall use 5mm coro.
I request experienced members to please provide tips regarding how I can keep the weight down.
Will try to post a detailed build log as I go along.
With 2200 mah battery, 2826 motor will be under powder, also with 42 inch wingspan requires more pull, use 2836 motor,
Mini avispad :headscratch:
Put the biggest prop the motor can take. A 9*47 or 10*47
And dont use landing gear
Twp strips of 5mm coro cut to make the spar...
Glued the two strips to get the spar for one side of the wing...
Feviquick sucks in everything around it into its stickiness (notice the torn newspaper) like a blackhole :P
Both sides ready...
Measuring 2" of dihedral and gluing in place with Hot glue. One drop of hot glue on each side, goes into the flutes of the coroplast and makes a solid joint...
2mm plywood glued on both sides of spar using 5min epoxy for support...
Do hurry. Taking forever
(http://obamadiary.files.wordpress.com/2011/06/yawn-big-funny.jpg?w=655)
Sit and relax....Grab some popcorn
:rofl: :rofl: :rofl:
Following this thread Maahin, this one will be a trend setter I believe, getting those cool number on the weight... quickest to get one in air with super easy available parts
Wing panel and Ailerons cut out.............
Ailerons glued to the wing panel...
Made the cutouts for the servo.
Glued the spar.
Glued reinforcement to the servo mount (Used ice cream sticks))
Scoring the Coroplast to fold it
Masking the ailerons with clear tape (So that excess cyano doesnt cause it to stick to the top of the wing.
Wing folded over and glued.
Wing Wrap glued. The wing is now complete.... ;D
Dimensions:-
Wingspan: 1070 mm (42 inches)
Chord: 250 mm (9.8 inches) (Including 1.5 inch ailerons)
Weight: 242 g
Too heavy. The 48" wing with servos, pushrods etc should be 220-240 g
You sir are super productive today..are we on for maiden on Saturday?
Most probably
Fuselage cut out...
Firewall made...
Formers made.
Ice cream stick used to strengthen servo mounts.
Fuselage folded and formers glued in place.
Vertical Stabilizer, Horizontal Stabilizer and Firewall glued in place.
Doublers for the Wing and Dowel rods attached.
Top of Fuselage glued in place
Video Video
Servos installed
Motor installed
Other electronics installed.
Made the battery tray and installed the ESC below it.
Made the hatch cover
Propeller installed
Ready to fly. (Used scrap pieces of Red Vinyl temporarily to help with orientation) Will make graphics later.
Final Specifications:
Wingspan: 1070mm (42 inches)
Chord: 250mm (9.8 inches)
Length: 910mm (35.8 inches)
AUW: 852 grams
Motor used: Turnigy 2826-10 1400kv
Prop: 9x4.7 SF
Battery Turnigy 2200mah 3S 20C
Flew 4 flights today. The model was a little underpowered and would start to drop below 60% throttle. Apart from that, it is a wonderful model. Flies like a Sport plane and flies pretty fast.
Considering that I redesigned the entire fuselage and empennage, it is no longer apt to call this an AviSpad, hence after seeing it fly, it has been renamed to AviSport.
Flies inverted very nicely with very little down stick. Also rolls and loops nicely, however these were slightly restricted due to the lack of power. (I plan on putting a slightly bigger motor)
All in all it's a wonderful plane.
http://www.youtube.com/watch?v=rASh0gA3fYc#ws (http://www.youtube.com/watch?v=rASh0gA3fYc#ws)
https://www.youtube.com/watch?v=y3Oosh79mKY (http://www.youtube.com/watch?v=y3Oosh79mKY#ws)
Quote from: maahinberi on July 26, 2014, 04:52:41 PM
The model was a little underpowered and would start to drop below 60% throttle. Flies like a Sport plane and flies pretty fast.
Considering that I redesigned the entire fuselage and empennage,
You have not mentioned that you "ün-designed" on the spar height; the thin wing is making it behave so.
Yeah, but it didn't affect the lift and stall characteristic much. The glide is pretty decent
Very clean build Maahin. Have you blunt the leading edge?
Of course it affected the lift! That is why you have to fly with high throttle
Haha, nice flying! Miss Sanjay sir's commentary :)
Upgraded the motor to NTM 28-36 1400kv with a 9x6 prop. The plane flies normally at half throttle now and pretty fast at full throttle, further living up to the name "AviSport"
Loops are now perfect as the plane has enough thrust to go vertical.
Getting 5-6 minutes of flight time with a 2200mah battery.
Moderator, requesting you to please change topic name to "AviSport Build Log".
Thank you
@Mjet
Sorry sir, missed your question.
I made three scores for the leading edge to give it a slightly rounded shape.
AviSport gets a new look
Update:
The new motor really has given this plane a new life.
Inverted flight is very easy at 3/4th throttle with very little elevator required.
The plane can climb vertically for as long as you want. Can do as big loops as you want.
Rudder authority is also good and Stall turns are easy to perform.
Slow rolls will require a little practice, however only from the pilot's side (Need to figure out the exact amount of rudder required). I am yet to try knife edge on this plane.
Glide is decent. It's not as much as the AviSpad, Bixler, Easy Star II etc. But it is equivalent to the Seagull 40 Low Wing Trainer (which I'm used to flying). Hence I did not face any problem there.
Finally sat down and drew out the plan.
Here it is:
(http://i1259.photobucket.com/albums/ii555/maahin_beri/AviSport1_zps853c4bd7.png)
(http://i1259.photobucket.com/albums/ii555/maahin_beri/AviSport2_zpsf9d570cb.png)
(http://i1259.photobucket.com/albums/ii555/maahin_beri/AviSport3_zpsaf1bb66f.png)
How do I remove the attachments??
Great Maahin. I highly reccomend this model
Plan 2: Is the fuselage width 50mm or 5mm as shown?
50mm. 5cm Sorry, I'll fix that in a while.
Updated Plans:
(http://i1259.photobucket.com/albums/ii555/maahin_beri/AviSport1_zps853c4bd7.png)
(http://i1259.photobucket.com/albums/ii555/maahin_beri/AviSport2_zpsf9d570cb.png)
(http://i1259.photobucket.com/albums/ii555/maahin_beri/AviSport3_zpsaf1bb66f.png)