This is the 1/5 mechanism we use on nose gear and rotate retracts. Normally supports 35 pound aircraft. For tricycle aircraft, normal weight distribution is 20 to 25% of the aircraft weight is on the nose gear. (For example: Aircraft weight 50 pouns--Only 15 pounds in on the nose gear. The remaining 35 pounds is on the main gear. Normally extension angle is 93 degrees. If you need something else, type in a comment in the order section and we will contact you.