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Title: Mini Avispad (90%) Build Log Post by: maahinberi on June 27, 2014, 10:19:01 PM 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. Title: Re: Mini Avispad (90%) Build Log Post by: prashant_rc on June 27, 2014, 11:29:37 PM With 2200 mah battery, 2826 motor will be under powder, also with 42 inch wingspan requires more pull, use 2836 motor,
Mini avispad :headscratch: Title: Re: Post by: sanjayrai55 on June 28, 2014, 05:05:33 AM Put the biggest prop the motor can take. A 9*47 or 10*47
Title: Re: Post by: sanjayrai55 on June 28, 2014, 05:07:31 AM And dont use landing gear
Title: Re: Mini Avispad (90%) Build Log Post by: maahinberi on June 28, 2014, 07:12:52 PM Twp strips of 5mm coro cut to make the spar...
Title: Re: Mini Avispad (90%) Build Log Post by: maahinberi on June 28, 2014, 07:15:12 PM 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 Title: Re: Mini Avispad (90%) Build Log Post by: maahinberi on June 28, 2014, 07:18:05 PM Both sides ready...
Title: Re: Mini Avispad (90%) Build Log Post by: maahinberi on June 28, 2014, 07:29:42 PM 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...
Title: Re: Mini Avispad (90%) Build Log Post by: maahinberi on June 28, 2014, 07:30:34 PM 2mm plywood glued on both sides of spar using 5min epoxy for support...
Title: Re: Mini Avispad (90%) Build Log Post by: sanjayrai55 on June 28, 2014, 07:47:07 PM Do hurry. Taking forever
(http://obamadiary.files.wordpress.com/2011/06/yawn-big-funny.jpg?w=655) Title: Re: Mini Avispad (90%) Build Log Post by: maahinberi on June 28, 2014, 07:47:57 PM Sit and relax....Grab some popcorn
Title: Re: Mini Avispad (90%) Build Log Post by: sanjayrai55 on June 28, 2014, 07:52:08 PM :rofl: :rofl: :rofl:
Title: Re: Mini Avispad (90%) Build Log Post by: girishsarwal on June 29, 2014, 12:23:53 AM 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
Title: Re: Mini Avispad (90%) Build Log Post by: maahinberi on July 17, 2014, 01:35:33 PM Wing panel and Ailerons cut out.............
Ailerons glued to the wing panel... Title: Re: Mini Avispad (90%) Build Log Post by: maahinberi on July 17, 2014, 01:37:18 PM Made the cutouts for the servo.
Glued the spar. Glued reinforcement to the servo mount (Used ice cream sticks)) Title: Re: Mini Avispad (90%) Build Log Post by: maahinberi on July 17, 2014, 01:38:03 PM Scoring the Coroplast to fold it
Title: Re: Mini Avispad (90%) Build Log Post by: maahinberi on July 17, 2014, 01:40:15 PM 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. Title: Re: Mini Avispad (90%) Build Log Post by: maahinberi on July 17, 2014, 01:44:16 PM 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 Title: Re: Mini Avispad (90%) Build Log Post by: sanjayrai55 on July 17, 2014, 01:54:20 PM Too heavy. The 48" wing with servos, pushrods etc should be 220-240 g
Title: Re: Mini Avispad (90%) Build Log Post by: girishsarwal on July 17, 2014, 02:19:47 PM You sir are super productive today..are we on for maiden on Saturday?
Title: Re: Mini Avispad (90%) Build Log Post by: maahinberi on July 17, 2014, 04:38:32 PM Most probably
Title: Re: Mini Avispad (90%) Build Log Post by: maahinberi on July 26, 2014, 10:44:57 AM Fuselage cut out...
Firewall made... Title: Re: Mini Avispad (90%) Build Log Post by: maahinberi on July 26, 2014, 10:52:27 AM Formers made.
Ice cream stick used to strengthen servo mounts. Fuselage folded and formers glued in place. Title: Re: Mini Avispad (90%) Build Log Post by: maahinberi on July 26, 2014, 10:54:15 AM Vertical Stabilizer, Horizontal Stabilizer and Firewall glued in place.
Title: Re: Mini Avispad (90%) Build Log Post by: maahinberi on July 26, 2014, 10:56:01 AM Doublers for the Wing and Dowel rods attached.
Title: Re: Mini Avispad (90%) Build Log Post by: maahinberi on July 26, 2014, 10:57:37 AM Top of Fuselage glued in place
Title: Re: Mini Avispad (90%) Build Log Post by: girishsarwal on July 26, 2014, 01:31:58 PM Video Video
Title: Re: Mini Avispad (90%) Build Log Post by: maahinberi on July 26, 2014, 04:33:56 PM Servos installed
Title: Re: Mini Avispad (90%) Build Log Post by: maahinberi on July 26, 2014, 04:34:27 PM Motor installed
Title: Re: Mini Avispad (90%) Build Log Post by: maahinberi on July 26, 2014, 04:38:05 PM Other electronics installed.
Made the battery tray and installed the ESC below it. Title: Re: Mini Avispad (90%) Build Log Post by: maahinberi on July 26, 2014, 04:39:25 PM Made the hatch cover
Title: Re: Mini Avispad (90%) Build Log Post by: maahinberi on July 26, 2014, 04:39:57 PM Propeller installed
Title: Re: Mini Avispad (90%) Build Log Post by: maahinberi on July 26, 2014, 04:41:37 PM Ready to fly. (Used scrap pieces of Red Vinyl temporarily to help with orientation) Will make graphics later.
Title: Re: Mini Avispad (90%) Build Log Post by: maahinberi on July 26, 2014, 04:44:38 PM 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 Title: AviSport Build Log Post by: maahinberi on July 26, 2014, 04:52:41 PM 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. Title: Re: Mini Avispad (90%) Build Log Post by: maahinberi on July 26, 2014, 04:55:24 PM 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) Title: Re: Mini Avispad (90%) Build Log Post by: sanjayrai55 on July 26, 2014, 05:18:40 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. Title: Re: Post by: maahinberi on July 26, 2014, 06:31:27 PM Yeah, but it didn't affect the lift and stall characteristic much. The glide is pretty decent
Title: Re: Mini Avispad (90%) Build Log Post by: Mjet on July 26, 2014, 07:19:30 PM Very clean build Maahin. Have you blunt the leading edge?
Title: Re: Mini Avispad (90%) Build Log Post by: sanjayrai55 on July 26, 2014, 07:24:39 PM Of course it affected the lift! That is why you have to fly with high throttle
Title: Re: Mini Avispad (90%) Build Log Post by: crazycalvin on July 26, 2014, 11:28:21 PM Haha, nice flying! Miss Sanjay sir's commentary :)
Title: Re: Post by: maahinberi on July 29, 2014, 07:58:57 AM 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. Title: Re: Mini Avispad (90%) Build Log Post by: maahinberi on July 29, 2014, 08:56:26 PM Moderator, requesting you to please change topic name to "AviSport Build Log".
Thank you Title: Re: Mini Avispad (90%) Build Log Post by: maahinberi on July 29, 2014, 08:58:15 PM @Mjet
Sorry sir, missed your question. I made three scores for the leading edge to give it a slightly rounded shape. Title: Re: Mini Avispad (90%) Build Log Post by: maahinberi on July 31, 2014, 10:32:48 AM AviSport gets a new look
Title: Re: Mini Avispad (90%) Build Log Post by: maahinberi on July 31, 2014, 10:41:40 AM 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. Title: Re: Mini Avispad (90%) Build Log Post by: maahinberi on July 31, 2014, 11:38:54 PM 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?? Title: Re: Post by: sanjayrai55 on August 01, 2014, 04:54:30 AM Great Maahin. I highly reccomend this model
Title: Re: Mini Avispad (90%) Build Log Post by: ashok baijal on August 01, 2014, 08:23:24 AM Plan 2: Is the fuselage width 50mm or 5mm as shown?
Title: Re: Post by: maahinberi on August 01, 2014, 08:25:24 AM 50mm. 5cm Sorry, I'll fix that in a while.
Title: Re: Mini Avispad (90%) Build Log Post by: maahinberi on August 01, 2014, 08:46:16 AM 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) |