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- เผยแพร่เมื่อ 6 ก.พ. 2020
- Making a canopy for my Brian Peckham Chorus Gull. With a combination of video and stills, this shows production of the 'plug' by making a skeleton frame, filled with blue foam, covered with lightweight glass cloth and then Big Boy metal filler. I also made a simple box and frame for vacuum forming and finally, the vacuum forming using 1mm PETG.
The PETG is stapled into the frame as you see in the video, heated in the oven, in this case electric set to 200 C and pre heated for about 10 minutes. When the PETG sags by about 75 - 90mm its ready.
PETG was bought from Trent Plastics Fabrications Ltd in the UK
Plans and article about this model available here: outerzone.co.u...
Video about onboard glow fitted following first flights: • RC Model Onboard Glow
Here's a link to the maiden flight: • Mew Gull - October 2020
I guess the best part of your design and fabrication process is that it’s repeatable. If the mold is incorrect, you can subtract or add material. Nice work!
M.S. Systems Engineer.
I love the simple but very effective vac forming box. Having the 2 vertical supports to guide the frame onto the mold is very clever. I would imaging that you are getting a very professional finish on the canopy. Beautiful job.
Absolutely magnificent 👍🏾
Wow, lovely job, great to see, thanks for sharing
Great job !! 🤩
hope you made a few like 5. it's so easy to break one even transporting or storing. and now one but no one ever thinks of including at least an extra.
Nice work. I made a similar system years ago but used a plastic tub. I used it about a dozen times before it imploded with an almighty bang. I was pretty much done so didnt bother making a new one out of wood but for anyone making one of these, use nice sturdy wood like David. ;-)
Wow great job congrats👏🏻👏🏻👏🏻👏🏻👏🏻
I've just made a canopy using the pop bottle and hot air gun method - you seem to have made hard work out of making the mould - to carve it then glass it and finally cover it in filler seems like two stages too many. I made mine from balsa and it worked great - I dont see why your method wouldn't work using the same style of mould as mine
Hi Richard, thanks for your comment. Unfortunately I couldn't use the pop bottle method as even a 3L bottle is not large enough, having scaled the original plan up 20% the canopy is 6" across/diameter over a length of 12", 3L bottles are about 5" diameter, so just not an option, additionally, pop bottles are very thin which might be an issue for this size of canopy. I would certainly consider the pop bottle method for smaller canopies though and save on time and effort.
Gr8 video cheers
Hi. Sorry, I know I'm late, but could you inform about the thickness of the PETG sheet you have used ? I tried with a sheet of 0,5 mm PET (instead of PETG), but after 5 minutes in the ovet it completely change from perfectly transparent into fully matt white. Probably the "G" is very important !!
Hi Marco, I used 1mm PETG.
Slick!!!
Amazing bro what is The type of glue? And sre rhere ant plan of this plane or it is kit
The glue or filler I used was Big Boy metal filler to cover the blue foam; trust this helps. It was built from plan, although I did scale it up by about 20% to get the wingspan up to 1.9m; details of where you can get the plan are now in the description and its a free download.
Thank you top musch bro i sub
What was used to protect the foam plug from the heat. It also had a grey coloured substance as a coat which must have been sanded down...what was that compound? Great technique overall.
The grey substance is Big Boy metal filler. I anticipated this would provide sufficient insulation for the foam from the heat of the PETG sheet as it was applied. This does appear to be the case, I think the heat of the PETG which is only 1mm thick dissipates very quickly to the surrounding air.
Great job! How do you heat up the PETG sheet and how do you know that the sheet is ready to go?
The PETG is held in a frame as you see in the video, heated in the oven, in this case electric set to 200 C and pre heated for about 10 minutes. When the PETG sags by about 75 - 90mm its ready.
Hi,nici work. How many minutes must stay in owen ,plastic sheet and what temperature?!
The plastic sheet (PETG) is held in a frame as you see in the video, heated in the oven, in this case electric set to 200 C and pre heated for about 10 minutes. When the PETG sags by about 75 - 90mm its ready.
Nice job! How did you cut the canopy to fit it on the aircraft?
I marked round with a felt pen and cut with sharp scissors.
Nice, how do you holding the PETG to the frame?
Where do you buy the PETG?
I stapled the PETG to the frame with a staple gun. PETG was bought from Trent Plastics Fabrications Ltd in the UK
Напиши чем ты покрывало пенопластовую болванку кабины чтобы натянуть на неё плексигласс?
А так, все супер, тебе +
I used Big Boy metal filler to cover the blue foam; trust this helps.
What was the grey plaster type stuff that you used
That is Big Boy metal filler.
@@davids_model_flying so it's not car body filler then.... it's like an epoxy filler
It's a metal filler, I used this so it would not melt or deform when the hot PETG was pulled over it. Ordinary car filler might work but I didn't want to take the chance. Here is a link that might be useful: www.toolstation.com/big-boy-metal-filler/p56231?mkwid=_dc&pcrid=&pkw=&pmt=&gclid=Cj0KCQiAxbefBhDfARIsAL4XLRqa2aQZyndHgst95Qm_FziZyenig4XS6mSCbSy0EmmlaEgVKYovUC8aAnt_EALw_wcB&gclsrc=aw.ds#full-desc
@@davids_model_flying cheers David..
I make a lot of molds but always use grp... So the filler looks interesting
@@davids_model_flying it's interesting that it's sold as a conductive filler...
So resists heat well and still sticks
🛩💎🙏👍