Michael

Since it is raining in Stavanger and I have been grounded with a cold for several days, I decided to take a closer look at your Twister 28.

I have never seen one here, but found its details under Sailboatdata. It appears to be a great sailboat which no doubt will take a JR  -  in fact  -  it is begging for it, since it appears to be under-rigged for its displacement, (4521kg): With working rig the SA/disp = 12.

Now I scaled up one of my pre-made master sails (AR=2.05) until batten length reached B=5.50m. That gives a sail area of 48.7sqm and a SA/disp=17.8. If you think that is too much, a lower AR master sail could be used (keeping B=5.5m) until AR=1.8 and SA=41.4sqm.

Frankly I think the sail should not be smaller than the one shown here: In the upper panel you can spot the original Bermuda mast top. I guess the JR mast should be cut to about the same height, or 10 – 20cm higher.

However, I am not sure if it is easy to fit the mast in the shown position, what do you think?

Cheers, Arne