Hello everyone. I hope you are all in good health. I am a newbie to this community and would like to grow as an RC hobbyist with the help of the wonderful people here. Kindly bear with me as I share my experience and eventually ask for help.
I got into this hobby by first purchasing a power pack and some building materials. I watched a ton of videos on YouTube from Experimental Airlines and FliteTest and read up on a lot of discussions on our platform and RCGROUPS. I started off by building my first scratch built RC electric plane and it was a grand failure. I built two more planes and they were grand failures too. I reckon I had around 45 seconds of flight, combined.
I acquired my electronics from: robu.in
My constant power pack:
1) Propeller: 7" X 3.8 " CW ABS plastic
2) Motor: A2212 6T 2200KV BLDC
3) ESC: 30 Amperes standard with BEC
4) Rx Tx: FlySky FS-CT6B
5) Servos: TowerPro SG90 mini
6) Battery: Orange LiPo 3S 1500mAh 30C/40C
7) Charger: SkyRC e3AC 3S-2S balance charger
Links to the 3 planes I built in order of trials:
1) Simple prop in slot delta wing:
https://www.rcgroups.com/forums/showthread.php?2314379-Central-Florida-FPV-Meet-February-20152) KFM2 based flying wing:
https://www.rcgroups.com/forums/showthread.php?1252282-24-DS-(Dead-Simple)-Flying-Wing-Pics-Video-Plans3) The infamous Nutball:
https://www.rcgroups.com/forums/showthread.php?836389-The-NutBall-best-damn-RET-foamy-yetAfter several failures my takeaway was that:
1) I never really got the CoG on spot or even anywhere near the ballpark for that matter
2) I have to keep the Wing Cubic Loading below 5
3) I have to keep the All up Weight below 350 grams
4) I have to set the throws of the control surfaces to a moderate value
5) I have to use stronger building materials( I used 8mm thermocol without any reinforcement ) A1 sized 5mm paper laminated foam board is quiet expensive and difficult to obtain in our Country. I found a very good store to buy it from though after months of surveying and buying the "wrong" foam boards which were very dense and looked more like poster boards.
https://www.vortex-rc.com/product-category/building-materials/paper-laminated-foamboards/* This is not a paid sponsorship *
After giving up for a while I decided to get back in the hobby and will soon order parts and building materials from the before-mentioned stores as they seem to provide reasonable prices and quality products and very good service post and pre purchase.
I would like to scratch build a flying machine and maiden it successfully. After going through some general construction details and design parameters I decided to build a very simple and "squared" airframe with the following specifications:
1)WINGSPAN: 30"
2)CHORD: 6"
3)KFM2 airfoil
4)Suitable polyhedral
5)1 degree angle of incidence
6)Modular tail section with (12" horizontal stabilizer length 4" chord 12" elevator length 1.5" width) and (6" vertical stabilizer height 4" chord 6" rudder height 1.5" width)
7)Swappable fuselage 23" long and tapered from the trailing edge of the wing
8)Wing placement: 6" from nose to leading edge
9)Suitable down and right thrusts
10)A landing gear as hand launching has not been very kind to my family
I would like to keep the wing loading below 7 so with the specified wing area I reckon the ALL UP WEIGHT should not exceed 300 grams.
The combined weight of the electronics(with cables) is around 150 grams and the battery alone weighs 125 grams(with cable)
I hope the foam board airframe is light enough to keep the All up Weight below the target.
This design is inspired by the NOOB TUBE built by Ed from Experimental Airlines:
I have invested around 12000 INR in this hobby and hope to get airborne soon and finally taste the sweet success of flying a homemade RC aircraft.
Any help (build plans and tips and tricks) regarding this topic will be much appreciated.
Please help out a brother have a successful maiden after 3 failures.
And let me know if scratch building the FT FLYER:
https://www.flitetest.com/articles/FT_Flyer_Scratch_build would be a better way to start off than the above mentioned scratch build.
Thank you for your patient reading.