That's like asking how safe are minivans. A well built, well maintained and sensibly used tandem bike don't come with any special risks.
Ride it like a fool, ignore the upkeep, and a tandem - just like any vehicle - can bea death trap.
We drove the horses tandem. (One behind another) We saw pictures of tandem bicycles.
Tandem bicycles can be purchased online at Amazon, Target, Walmart, The Tandem Link, and Precision Tandems. Many bicycles shop should have a website where you can purchase the bikes as well.
Tandem bicycles are bike designed for more than one rider. Brands that offer tandem bikes are Co-Motion cycles, KHS Bicycles, Santana Tandems and Trek Bikes.
tandem trikes
Yes there are, and they're called tandem bicycles.
There are several places that build tandem bicycles, from small custom shops in basically any country, to factories usually in Asia.
That depends on what rear wheel the tandem is equipped with. Can be a cassette rear, but can also be something else. Hopefully it hasn't got a freewheel.
A tandem bike has two seats, and two handle bars. The seats are NOT side by side, and the only the front steering wheel can turn. They make tandem bicycles for adults, but there are a lot of tandem bikes that are designed for an adult in front and a child in the back.
There's no specific rule about tandem bicycles and cars. However, there ARE rules about how you're allowed to carry stuff on your car. It has to be properly secured, isn't allowed to protrude too much, can't hide/cover lights or number plate etc. As long the tandem fulfils those requirements, you're OK to carry it.
Tandem skydiving is quite safe for seniors since there is no upper limit required for skydiving programs instituted by the U.S. government. However, there are health risks that everyone attempting tandem skydiving should know. Those individuals who suffer from hypertension, cardiovascular conditions, arthritis or other musculoskeletal problems or history of stroke should consult a doctor personally. http://sky-diving-men.blogspot.com/2007/07/when-not-to-choose-tandem-sky-diving.html
Tandem Trunk is a trunk circuit which connects a tandem switch to another tandem switch or to a telephone company central office.
If the bicycles belong to ONE FRIEND, it's "friend's bicycles." If the bicycles belong to TWO OR MORE FRIENDS, it's "friends' bicycles."