Search found 236 matches

by newt2u
Tue Oct 13, 2020 4:47 am
Forum: Everything Else
Topic: Profile to F21 lifting rudder
Replies: 38
Views: 22208

Re: Profile to F21 lifting rudder

So I needed to fill the gaps but at the same time ensure there was good bonding around these areas. I used a filler made from epoxy with the addition of glass microbaloons. This filler is strong and yet can be sanded relatively easily. I mixed two pots, the first at about 3:1 balloons to epoxy by vo...
by newt2u
Tue Oct 13, 2020 4:38 am
Forum: Everything Else
Topic: Profile to F21 lifting rudder
Replies: 38
Views: 22208

Re: Profile to F21 lifting rudder

As I said in the earlier post, the leading edge (LE) of the blade, as well as to a lesser extent the trailing edge (TE) were profiled, this means that they were not flat, so there was no bonding over about 2-3cm at the LE and 0.5cm at the TE, there was also a ding in the blade at the TE.
by newt2u
Tue Oct 13, 2020 4:34 am
Forum: Everything Else
Topic: Profile to F21 lifting rudder
Replies: 38
Views: 22208

Re: Profile to F21 lifting rudder

Thanks Dr. Today the epoxy is fully cured so I removed the backing cutoffs and trimmed the foam to the tip shape of the blade with a hacksaw and then rounded off the tip, as well as the square edge at the root. I used 180 paper but you have to be careful with the foam as you can deform it by being t...
by newt2u
Mon Oct 12, 2020 3:12 pm
Forum: Photographs and Drawings
Topic: Freeway sailing in Southampton Water Sunday 11th October
Replies: 2
Views: 5776

Re: Freeway sailing in Southampton Water Sunday 11th October

Thanks, nice picture. I grew up sailing out of Portsmouth and later Southampton.
by newt2u
Mon Oct 12, 2020 8:07 am
Forum: Everything Else
Topic: Profile to F21 lifting rudder
Replies: 38
Views: 22208

Re: Profile to F21 lifting rudder

First side is now cured to solid (not fully cured yet), so flipped over and laid down the second side. You can see that as the original plate's leading edge was profiled to a point I will have to fill and build up the leading edge in order to get the correct profile.
IMG_1061.jpeg
IMG_1061.jpeg (103.57 KiB) Viewed 6383 times
by newt2u
Mon Oct 12, 2020 6:24 am
Forum: Everything Else
Topic: Profile to F21 lifting rudder
Replies: 38
Views: 22208

Re: Profile to F21 lifting rudder

First side of the profiled core epoxied to the plate, with an assortment of weights to hold it down while it cures. I am using the blank it was cut from over the core to maintain pressure over the curved surface.
by newt2u
Mon Oct 12, 2020 6:18 am
Forum: Photographs and Drawings
Topic: Freedom Videos
Replies: 23
Views: 25699

Re: Freedom Videos

Hi, I posted some pics of my blade jib in another thread: https://www.freedomyachts.org/viewtopic.php?f=9&t=13185&p=52979&hilit=blade+jib#p52979 Also had a discussion on the mainsheet in the original thread that contained this video. Basically the spray cover makes it difficult to access the main sh...
by newt2u
Fri Oct 09, 2020 10:30 am
Forum: Everything Else
Topic: Profile to F21 lifting rudder
Replies: 38
Views: 22208

Re: Profile to F21 lifting rudder

Blue foam cores arrived today.
IMG_1055.jpeg
IMG_1055.jpeg (133.91 KiB) Viewed 6477 times
So I stripped back the rudder plate to bare aluminium...
IMG_1054.jpeg
IMG_1054.jpeg (128.53 KiB) Viewed 6477 times
... and test fitted the cores. They fitted perfectly and will only need a small trim around the tip of the rudder which is angled and rounded.
IMG_1056.jpeg
IMG_1056.jpeg (68.26 KiB) Viewed 6477 times
by newt2u
Thu Oct 08, 2020 7:26 am
Forum: Everything Else
Topic: Profile to F21 lifting rudder
Replies: 38
Views: 22208

Profile to F21 lifting rudder

I am not a fan of flat plate rudders, as they tend to stall out under high load, this separation of flow can cause loss of control. Although I have not had problems with my F21 to windward, I did have to fight the rudder a bit with the spinnaker up on my last sail of the season, so I have been think...
by newt2u
Thu Oct 08, 2020 6:54 am
Forum: Photographs and Drawings
Topic: Freedom Videos
Replies: 23
Views: 25699

Re: Freedom Videos

Just saw this thread and thought I should post a link to a video here that I had included in another thread. That way we can keep all the video links together. For those that saw the "F21 first sail" thread, it's the same one.

Freedom 21 - Click here