Frank,
You & Nev & M61should've been writers! All of you do a fine job of it with you Frank getting the top spot for the best great answer.
I can relate this one very bad incident of how much weather an ultralight can take. Unfortunately, it wasn't a Drifter but my 503 powered Trike.....
It was getting late, friend (rider) and I were at a very make-shift, isolated spot surrounded by trees, weather coming in, roll cloud ahead of it. And naturally between us & my home strip.
What to do? No tie downs, no rope (stupid), being the PIC I elected to takeoff into it. My experienced mate/rider was equally as dumb as me & agreed to it.
Got out okay but within one mile we met the gust front! I couldn't yell at my pal to helped me with the control bar because of the noise & I had all I could do to keep us upright! It was totally wild! Actually just about out of control.
Don't know if any of you have ever flown a Trike with a big, hi-lift wing but they are a handful in normal summer thermals with NO wind!
Then here comes the roll cloud! I fully expected the wing to collapse as I shot a glance at the wildly thrashing trees below! Updraft, downdraft, sideways this way & that, power on, power off, groundspeed maybe 5 mph, just enough to see minimal forward movement below. My arms took a battering but I was in great shape back then. Now, at 68, crash!
No rain thank God but it spit us out about 5 miles later. The most terrifying ride of my life & your listening to a 68 year old Beech 18 freight pilot. Believe me, I have seen the elephant but this was terrifying!
We made it of course but you young guys out there.....Do Not Push the Weather! It will kill you. Fly smart! Not stupid! If you need to camp out & wait it out....pitch a tent!
Today I carry spare tools, spare parts, rope, cell phone, first aid kit, pop up tent etc. in my Trike & Drifter. Sand bags are great to fill & bury for a makeshift tiedown where now is available. I carry 8 of them (empty). LOL.