Did not have a blowout, rather a tread separation followed by rapid deflation (which is more common than actual blowouts in the overloaded tire scenario).
I remember it as my Mom driving, but my brother insists I was behind the wheel. The vibration from the tread separation was felt through the hitch to the tow vehicle, so we were already slowing down when the tire deflated. The trailer rode on the flapping rubber and rim until we got it stopped off the side of the road.
Damage? Flapping tread tore up the fiber insulating board covering the bottom of the TT, but did not damage anything else.
This was early 1960s on two-lane mountain highways, climbing a grade, so we were probably at about 35-45 mph. Today, towing 70-80 mph on superhighways, you might have 4X the energy in the pieces flying off the tire, and a more precarious control situation.
I have two RVing friends who have lost control from these tire situations at superhighway speeds, in one case the TT broke the hitch and rolled on its side, in the other it stayed attached and took the truck over onto its top. Having tandem axles didn't seen to help the situation, with one tire down the trailers went into accelerating sway. In both cases, the TT was pretty close to max weight ratomg for the tow vehicle, and close to the weight of the tow vehicle.
A single axle trailer is going to be lighter, so may not have as much influence on the dynamics. OTOH, you might be towing a lightweight trailer because the tow vehicle is also small and light.
An actual blowout, sudden and total deflation without warning, is something really different, with respect to handling it. There is no time to react, or slow down, before you are on the rim. Same for zipper failures, which are more common on radial tires than the blowouts we used to get with tube-type bias ply tires.
