So, as I stated in the previous post, I have some low resolution video (sneak preview if you will) of the Maiden Flight of the WWI Rogallo Fighter. The previous post gives a description of the flight, so without further delay, here’s the vid. Enjoy.
As I stated earlier, it’s low-res due to the fact it was taken from an impromptu hat mounted camera, so now we will have to bring some better gear out for the next go and get some better shots. Drawing up the plans for sale to those interested in building thier own version, as well as further refining test flights are next on the list for this one…well, that in addition to having a heck of a lot of fun flying this thing! On a side note, the plans will allow you to detail the design any way you like, so in essence you can turn it into a French, English, or German variant.
For the technical aspect, this one is flying on an old OS LA.25, and has plenty of power. The wings also fold for compact transport.
By the way, to follow the build/design history of this model, click on WWI Rogallo Fighter in the menu bar on the right, and you can then review the entire archive relating to this design.
All for now!
Video will be arriving shortly, but I am pleased to relate that the WWI Rogallo Fighter has had it’s maiden flight test and passed with flying colors. She flies and flies well.
While attempting taxi tests the first downfield run ended quickly with a tire sticking in a hole and the machine just stopping after a few feet of travel. Determined to “get going a bit better” I added a bit more throttle (roughly half) in the intent to get rolling and skip over the dings in our less than perfect airstrip. To my suprise, at only 1/2 throttle and in less than 4 feet she leapt into the air. In an instant I chopped throttle and she hovered at around 5 feet high and began to descend, then I thought in that split second….what the heck…gave her the juice and she sailed on out. After calming down a smidge from seeing her sailing around above, and with a few clicks of right and down trim, she cruised at less than half throttle with ease. She will climb like nobody’s business, and is very responsive in turns. Landing was as easy as cruising in, chopping throttle and descendng to a gentle flair. She rolled in right at my feet.
As I said, preliminary vid will be here soon!
Some of the following pics detail the finshing up of the rogallo wing, and its final attachment and fitting to the mast. The wing covering is heavy mill plastic, I can provide the exact specifications later if anyone is interested or building this design for themselves, but off the cuff it is a heavier type “outdoor” trash bag that was used, and is of a good thickness to ensure durability.
So, as it stands we are ready to begin some preflight trials, engine runs, and normal tweaking in preparation for the maiden flight. This makes two aircraft that are standing by at the moment in preparation for first flights. The other is the Roland CII, which once the final bugs are ironed out, will be heading skyward soon as well. More to come.
These are some images of the experimental prototype of the Rogallo fighter. The concept of course, is a rogallo winged machine coupled to a solid traditional fuselage, and making that operate in such a way as to be able to fly, and fly with decent characteristics. This was accomplished in this first prototype. In the spirit of inventiveness, I decided to go with a Victorian, Jules Verne-esque theme, and my notion was to make this machine appear as though it was an aircraft that perhaps Captan Nemo would have devised….once he was done of course with perfecting “death-subs”. Hence the “N” on the rudder.
The flight characeristics of this prototype were excellent, that is after enlarging the wing area by about 1/4. The first wing incarnation simply would not allow it to leave the ground. After this change however, she was a joy to fly. As you can see in the images if you look closely, the mast also provided for an adjustable AOI,or angle of incidence of the wing, which allowed me to find the best angle of attack for the performance I was seeking. The flight dynamics are good, with a great slow flying and easy handling feel. The plane is quite docile in the air, and cruises by at a very relaxing pace. Being very stable, it would also make a good video platform. She won’t do much in the way of aerobatics…but slow flying and tight turning are her forte’s, and she will wing over nicely. The only drawback to the design so far is in the event of an engine flame out, (being incredibly stable), when this occurs if level flight is maintained, she simply will not turn very much, no matter how much rudder input is given. This came as a rather rude suprise the first time this happened, and she landed well, just not where I wanted. I did find a solution, and it is entirely in the the way you pilot the machine in this event. I discovered that on the occasion of an engine flame out, if the pilot needs to turn the plane, nosing down to pick up speed, then hitting full up elevator, and full left or right on the rudder would induce a stall turn, and thereby allow the pilot to re-align his direction for a landing. With enough altitude, there is then no issue in navigating back, or at least very close to where the pilot wants the plane. Without enough altitude, well, in that case it won’t matter what your flying, as the reults will all be the same.
Here are some more pics of the wing being framed….
These two thimbles have a wire attached which pass through a hole in the front of the triangular fitting to keep them in place, but still allow them to pivot when needed to retract.
This shows the wires pulled through and twisted.
Here is what it looks like fitted to the fuselages’ mast.
A frontal view…..
And finally a view of the metal bands that attach the fore/aft member. These will be drilled for bolts, and another shelf added for the horizontal member with bands and bolts as well.
These are some shots of the basic wing layout, as well as the metallic nose cap that allows the wing to fold in and retract.
Hard to imagine that this bundle of sticks will be a wing.