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FPVicious

Straight-A FPV Plane

by FPVicious Jun 30, 2017
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What is the span and all up weight of this model ??

I used hobbyking CA glue

How did you guys glue the parts together? pro

No answer .. ?
Too bad I've printed everything except the tail, that does not want to work

Hi

Thank you for this super designed airplane
I have been printing for a few days but I have a problem with the tail
I have created 3 profiles as you have specified
But with the tail I have problems
The lines of the reinforcements continue to pass through the outer layer
That is not how this part is designed, I think
I have already changed various settings in the slicer, but I can not get rid of the lines.
They are even visible in the slicer

thank you for your time

Mvg Steve

What material do you recommend to print this in ? I have PLA+ and PETG at the moment. I noticed your videos show PLA. I would have thought PLA might degrade over time.

I printed the Staight-A with PLA. Later, I made comparisons with undyed PLA and undyed PETG, the PETG is a bit softer and more elastic. So PETG is certainly better suited for very filigree constructions. The best mechanical strength is also given by the omission of colorants, PLA naturell is better than PETG black in my opinion.

When printing such sturdy constructions, high temperature and very slow printing are important. Good hints are the page https://3dlabprint.com/shop/spitfire-mk-xvi-s3d-cura-ready/
(By the way, I reprinted the Spitfire with direct GCode and she flies very well).

Greetings

Hi FPVicious,

Again, my respect for the beautiful design.
So far, I seem to be the only one who has built and flown this model.

Therefore, I would like to share a few experiences and tips with other followers:

  • most importantly, the EWD (difference between the angles between wing and tail) should be at least 1.5 to 2 degrees. That means the rear edge of the tail unit upwards. It would be good to construct it right in the fasteners.
  • the center of gravity for the first flights should be only 25% of the surface depth. Later, you can go further backwards, bit by bit. Otherwise the flight behavior can become critical.
  • With the used engine Turnigy D3536 / 6 1250KV and a propeller 8x6 "on 4S Lipo battery, the drive can push the model almost vertically into the sky :)
  • In my experience, it would be good to consolidate the carbon tubes for the tail before assembly with a carbon braided hose and very little resin. In my model, they are torn along, there they have little resistance to twisting.
  • The wings I planked 1.5mm balsa, after the first crash, I have the balsa covered with a plastic fabric, which has brought a lot of stiffness.

My model friends and I were thrilled with the sight of the model during the flight

Best Greetings from Germany by VolkerFi

What are the flight characteristics like of model ?

Hey Volker it was a pleasure following your build, and i love the winglets design. I am sorry the aircraft had an incident.. I talked to two other aircraft designers on what might have gone wrong-our guess is it must be mechanical failure, but its hard to say without more info. Anyhow, mine is almost ready for maiden and after the test ill have a better understanding of how the craft behaves with the new tail. Best regards, FPVicious

Hi FPVicious.
Crongatulations for your work in the design of this model. I know this things take much time and testing. That said, i want to say thank you for sharing this plans.
This model really looks a very good platform for FPV and if you dont mind i would like to reccomend 2 things on the model design.
First, would you agree in reinforce the fuselage using the same metod that is used by KRAGA (https://www.youtube.com/watch?v=t5pQwxqLQoU&t=1448s). If you use 4mm carbon rod that would give a tremendous strength to the fuselage with very litle weigth added. It would also increase the payload capacity for longer fligths.
Secondly, have you considered a better access to the rear interior of the fuselage for better electronics placement/access.
I belive that this model as a great potencial for a very good FPV platform. Keep up the good work and once again, thank you for sharing this with us.

Hey Tettraspehere, thank you for the comment! It's interesting you mentioned carbon spar through the fuselage-the first version was actually designed to have a spar run through it, but after printing a version without i was really pleasantly surprised at the stiffness and rigidity of the fuse, so i decided to scrap it from design, as weight and cost reduction. I also tried to model in a back hatch to the fuse, but wasnt happy with the results-it weakend the structure of the fuselage, so i decided to enlarge the wire hole on the top fuse to "accomodate" an index finger and a thumb for potential squeezing in aditional components. I have a new tail design i need to test before the snow comes, and after that ill dive in the fuselage mod (better fpv plattform) and quite possibly an extra hatch on the back. After testing out how that version behaves ill decide on whether to further develop this design or start on idea thats brewing in my thoughts (fast twin motor fpv cruiser) in similar style of build.

What square carbon tube did you use? 6.5mmx6.5mm?

Its a square 6mm carbon/glass rod.

Great design!
Want to print one...which infill did You use?

Hello!
I think that this airplane is really cool and creative. I have a project in mind and this airplane frame would suit it perfect, but it is a little bit to big. Is there any posibility that you could doewnscale the model for me and send me the files?
Best regards Ben

Hey, thanks I'm glad you like it. There would be many issues when scaling this down, pretty much all of the thicknesses would be off, not to mention the carbon elements, servo holes etc. it would be a whole new project :/

Ok, thanks for answering!

A very appealing design.
When I saw it, I wanted to build it up, whether it was from 3D parts or conventional.

So I have already before publishing the video part 2 started, a few parts to print and adjust.
From the construction I report bit by bit on my blog (in German), but with enough pictures. This can happen, I am a "slow" model builder.

I'm looking forward to news from the construction of the original model and other replicas .....

Many greetings from VolkerFi

https://bussard2falke.blogspot.de/


Ein sehr ansprechendes Design.
Als ich es sah, wollte ich es sogleich aufbauen, egal ob aus 3D-Teilen oder herkömmlich.

So habe ich schon vor Veröffentlichung des Videos Teil 2 begonnen, ein paar Teile zu drucken und anzupassen.
Vom Bau berichte ich Stück für Stück auf meinem Blog (auf Deutsch), aber mit genug Bildern. Das kann sich hinziehen, ich bin ein "Langsam"-Modellbauer.

Ich bin gespannt auf Neuigkeiten vom Bau des Originalmodells und auch weiteren Nachbauten.....

Viele Grüße von VolkerFi

Hey Volker, mein deutsch is nicht gut.. so i will write in english, it looks very good so far! I have made few changes to rib 6 and 7, i make them more thick. Just started the assembly and am making a video, unfortunately i am still waiting for the servos in post so it is going slow for me too. I also modeled few things that will make the building easier, spar stands and the rib distance tool (check the new items on the thingiverse).
I am very happy to see you decide to build it and i will follow your blog closely. Good luck with the build!

Love it. That's exactly what I was looking for as a concept (3D printed ribs and fuselage). Wait to see it fly. Bravo !!