I know that Chris Heinz was working on and built the "gemini" twin, but that it isn't going to be released anytime soon. Are there any other experimental twins out there, either kit or plans?
GEMINI CH 620
GEMINI CH 620
I would expect Lancair or those alike to come out with a (conventional) twin as "the next step up". With 2X 350 hp one could keep up with the slowest microjets and beat them easily by range...
It's a tandem seat dual (two engines, two pob). Projected top speed (@ max continuous power, 2x100hp) is 220 kts @ sea level and 275 kts from FL140 up.How many seats / useful load?
Well you don't need those to go high up (I've been up to FL180 with nauseous oxygen only). Oxygen instead of pressurization and overpowered engines instead of a turbo. Your cruise speed will stay roughly constant once you go up high, but fuel consumption will seriously degrade, at FL180 your range can be almost twice that of low-level flight, flying on atmospheric engines.
First of all, by thinking why you would want one. Twins need more power (has to fly once one engine fails), have serious conceptual and control issues and because of the aforementioned reasons are way more complex and expensive to both design, build and operate.So, if I were interested in designing my own, where do I start? onder:ara::whistle:
Reliability (over the open ocean).First of all, by thinking why you would want one. Twins need more power (has to fly once one engine fails), have serious conceptual and control issues and because of the aforementioned reasons are way more complex and expensive to both design, build and operate.
I personally can think of only two reasons to go the twin-route, reliability (in case an engine fails) and a lack of a suitable engine. If you're looking at a 700+ hp ship and you want a certified engine you might want two engines for example, though the single turboprop is by far the most popular option.
(Pardon the rude nature) Or you could forget about the fear of engine failure altogether and take a single. Look at the statistics! Just keep in mind that no matter what you do, you still die in the end.ara:Reliability (over the open ocean).
You're completely correct, at least for a certified engine. Comparing a double certified piston with a single turboprop failure rates are comparable. While the piston isn't such a bad engine a major part of engine failures aren't limited to one engine. Fuel starvation, carb/prop icing, faulty parts and so on will occur to both engines at the same time. Also a piston is of course much more complicated than a turboprop will ever be, not to mention the much more expensive fuel (avgas is going way over 10 US$/gallon, jetfuel is less than half)(Pardon the rude nature) Or you could forget about the fear of engine failure altogether and take a single. Look at the statistics! Just keep in mind that no matter what you do, you still die in the end.ara:
You might be interested in looking at turbine or wankel singles.
He also had the Boomerang. I don't believe it ever went to plans, but was reportedly far superior to the Defiant.Burt Rutan had the Defiant, but decided to get out of the plans business. I would bet you could find plans for it... Story is it was an excellent and versatile bird.