TOPIC: HOVERCRAFT

topendhover

 

Now to build the back end.

 
Luckily the 50mm sheets came as 1/2 sheets so I did not need to cut lengthwise to size. The sheets are 2500 long so I needed to trim 60mm off each peice for the stabaliser and elevator. 
From the plans I cut out the leading edge profile and transducer to 3mm ply, I used this to mark the profile on all edges that requires the profile. I made a small hot Wire cutter to cut a triangle out of the leading edge and then hand sanded the remaining profile by hand.

Once the stabaliser was to shape I needed to cut 2 slots that matched the angle formed by the long support beams at the back. This took a while to get correct.

20190106_125223-1613x784.jpg

20190106_125225-1613x784.jpg

20190106_125231-1613x784.jpg

The fins sit underneath the stabiliser so I cut half the leading edge profile to one edge of the fins so it will sit nicely onto the stabaliser.

20190106_125234-1613x784.jpg

I made a larger hot wire cutter to cut the profile for the moving surfaces. They needed to be shaped to a point. As the wire was longer the cut process took a long time even with 16 volts used. Once the cuts were done I sanded to shape, surprisingly this did not take too long.

20190108_154318-1613x784.jpg

20190108_154319-1613x784.jpg

Once all surfaces were done I glassed each one with 6oz cloth. A lot of time involved with this (1 hour per stabaliser side). The foam sheets were slightly warped so I placed weights during the cure process.

20190107_115817-1613x784.jpg

I sanded and bogged any imperfections I could find. When I finished sanding the glass came very thin, in some places back to the foam. As these parts will be subject to harsh conditions I have chosen to regulars all with 3oz cloth. Once sanded again I believe they will be only slightly heavier than just 6oz.

20190107_115814-1613x784.jpg

I spent a lot of time deciding how to do the hinges. The plans say to use Kevlar cloth. I believe this will be messy and too hard to do. Metal hinges will be too hard to secure to the foam. In the end I tried to make a hinge with my 3d printer and surprisingly the parts came out smooth and very strong. I will use 10 for the elevator and 4 for each rudder.

20190113_164414-1613x784.jpg

 Now to glass the elevator and rudders. This went fine except for 2 places on the elevator and rudder. My scales malfunctions causing me to mix the wrong ratio of epoxy. I had too much resin and it would not set. Luckily it was only 2 patches. I used a hair dryer to peel off the fibreglass and used a blade to scrape off the glue. Once I re glassed it was completely fine luckily !!

20190129 213516 784x1613

 20190129 213514 1613x784

 

 

We're sorry, you must be logged into the website to post comments.

Author / Member : Topendhover

About Us

HOVERCRAFTER is a web-based community of enthusiasts discussing all things that are hovercraft related. If you're an experienced hovercrafter we'd appreciate your input. And if you're new, this is a great place to learn! Our goal is to create a place where the community can come together, build knowledge, and help one another become better hovercrafters.
We'd like YOU to join us! hovercraft,hovercraft kits,sevtec,universal hovercraft