Fireball Buildup The design concept is to develop a Single place ultralight that can utilize a four stroke engine and fit into Part 103 Legally. But it has the capacity to fly a second person if proper licensing is obtained. Picture showing the Fireball Fuselage tubing pre-bent. Design of the aircraft and Drawing development began in September of 2003. Tubing development began in March of 2004 This picture above shows all associated tubing for fuselage and tail section. All tubing is alum. 6061-t6 and anodized for weather protection. Pre cut and drilled and ready for assembly. The below picture shows the beginning assembly of the front of the fuselage. The fuselage is so designed to make the assembly process easy for the homebuilder. The fuselage is only 12 inches wide.   The engine mount and firewall assembly is shown above with 1/8 plate utilized for strength. The engine mount support tubes are 1” .083 thick tubes while most other tubes are 1” .049 with some using inner sleeves for added strength. The assembly process is refined and documented throughout the building process. The next picture below illustrates the fuselage now as it takes shape. A 2 inch tube is added for the backbone to give the fuselage a nice shape when the metal skin is attached later. As you see the vertical stabilizer also starts to take shape. In the picture below you now see the keel tube, down tube cabanes, and the tail section have taken shape. The landing gear has also now been bent and installed. Material for the keel tube is 2 x2 square tube .125 thick and has been used on the Clippers successfully in the past. The down tube cabanes are 1inch .083 tubes.   Tubing for the landing gear are 1”.083 double tubes and should have considerable spring effect on ground handling. Notice the aluminum sandwich plates used to locate the gear to the fuselage. This picture was taken in July of 2004. Generally in the design of the aircraft some things are overlooked in the 2-d process of developing the drawings. It was noticed at this point that headroom in the pilot compartment was in bad need of rework. Only a person of smaller height could fit this design so the keel tube had to be raised 5 more inches. So the fit now would acquire a 6’-5 inch person easily. The final picture at this point now shows the completion of the tail section, fuselage, and main landing gear. Wings have already been fabricated and assembled but not yet shown. If you notice the wings are high enough to walk under. All tail surfaces are enlarged to provide good handling characteristics which other designs fail to consider. The HKS 700 Engine has now also arrived and will be mounted soon. So we now have the beginning of a new motorcycle airplane. END