True on the first, false on the second.
Yes, Uhlanen regiments still had lances during WW1. No, they were not sectional aluminum screwed together prior to combat.
Think about the forces involved with 1 ton of horse and rider behind a lance at 20+ MPH.
No. A sectional lance would come apart on impact.
I think that idea might come from a few surviving Uhlanen lances for sale on Ebay. The owners probably cut them into pieces and put aluminum spacers so they can be sold, shipped, reassembled and displayed.
I have an original Uhlanen lance. It is 14 feet long. Rolled tubular steel shaft with gutta-percha for the handle topped with a forged steel spear point that is about 2 feet long, including the 1+ foot section that fits over the steel shaft.
If you want to buy it, there is a price I will part with it, however, shipping is up to you.
There are 3 ways you can get your Uhlanan lance shipped:
1. Drive to the seller and strap it to the top of your pickup truck with the bright orange flag on both ends to indicate oversize load.
2. Contract with some LTL carrier that will make the pickup and drop-off with the rest of their cargo.
3. Cut it up into pieces for standard shipment via UPS or FedEx, insert aluminum threaded spacers and screw it together for display.
If you don't believe me, go to UPS or FedEx and say you want to ship a 15 foot long steel pipe about 2 inches in diameter.