Join Date: Apr 2002
Location: San Francisco Bay area and West Coast by trailer
Thanked 11 Times in 10 Posts
Rep Power: 18
Re: sailcloth 3.8 vs 4.93 - advantages
Challenge Newport 3.8 vs Challenge 4.93 High Modulus Low Aspect vs Challenge 4.93 Atlantic Low Aspect
I strongly recommend you choose the 4.93. It's a much superior cloth compared to the 3.8 for your 18 footer. The 4.93 is more tightly woven, requires less resin, and is made with lower stretch yarns. It has much lower stretch. (4.93 costs more than 3.8 too)
The 4.93 is excellent cloth for small boats, and will hold its shape longer than the 3.8. The 4.93 will be fine in light winds under 5 knots and better than 3.8 in enough wind to heel the boat or when reefed. (over 12 kts)
The 3.8 is an excellent choice for dinghies with bendy masts, IMO, and it comes in lots of colors. It's the cloth of choice for Optimists, etc. It's not a great choice for an 18 foot trailerable however.
The image below is a magnified picture I took of 4.93 on the left, and 3.8 on the right.
You can see how the 4.93 (on the left) has a much tighter weave and a much higher thread count than 3.8.
San Francisco Bay and Delta
Last edited by jblumhorst; 12-02-2019 at 05:20 PM.