Discussion in 'Hangar Flying' started by Inverted Vantage, Nov 15, 2009.
So would it still be so appealing with fuselage "bubbles" around the seating area?
A 7hp airplane?
I don't know. For me personally I'm a fan of extremely spartan and simple as it concerns this type of flying.
Funny, 100 years ago people were trying to solve the high cost of flying with a "cheap airplane", but were shutdown by the relative low cost of existing aircraft.
...Just like today.
The Parasol is much simpler.
I wonder what the cubic inches of this engine is it is supposed to be 18hp variant?
There are some sweet deals in the used airplane market for sure. At least they look like sweet deals. LOL.
18 how is doable. Here's a Heath midwing on 40 hp. There's really nothing new in aviation for the most part. Ingenuity and effort are what's missing.
Looks kind of sort of like a SPAD me thinks
A thor v-2 is 1000 cc. Looks like it’s turning a 6 ft prop my guess at 1200 -1400 rpm. If you want to fly on 7 hp, you will need to turn that high pitched 6 ft prop the same. A 37 hp 1/2 VW is about the same size and needs to turn a 54” prop 3000 rpm to make its power. If you lug the 1/2 VW down to 1200 rpm with a big prop you are probably in that 10 hp range. If it does not overheat or toss a rod from the weight of the big prop. Straight up hp is not a good indication. Conditions the hp is delivered is important too.
Yes as Pops pointed out quite a while back … cubic inches.
Have you guys dropped in at the "Ranger" thread? Fritz has designed (still busy, actually) an extremely inexpensive single seat plane, relying heavily on CNC cut parts which you can either do yourself, or have done quite cheaply at your local shop (or even Makerspace). I don't think it gets cheaper or more simple than this.
I think lots of people think horsepower is thrust. What I think is also interesting is that although we measure horsepower the same, we do not use 100 year old dynos. Accuracy was all over the place then, if even tested.
My guess is the Thor was allowed to spin faster to make the 18 hp. I don’t think they made an 18 hp engine. Motorcycles must have been pretty cheap used. Thor , making a lot of engines for others, must have transferred the engine technology to Henderson/Excelsior and Heath followed the light weight motorcycle engines with his modified 4, but they were 27 hp I think.
I’ve seen video of a glider towed aloft (in ground effect) by one horse.
The Heath Parasol and the Legal Eagle are almost the same size. It would not take much to turn a LE into a Heath clone if the styling is to one’s liking. The formula for this type of plane is pretty solid even after a hundred years.
An average horse can put out 15hp or more briefly. The 1hp rating is continuous for hours. https://www.reference.com/pets-animals/much-horsepower-horse-d661ccbca1289a0
Some humans can produce 1hp for a minute or so.
I'm watching the thread with interest. It's not done or flying so I'm just watching. It seems like a pretty cool airplane but it's not any cheaper than what's currently available in the market place. I might be missing something though?
The Legal Eagle, Sky Pup and Minimax are pretty darn cheap, well known, proven and pretty simple to build. How is the Ranger idea different?
Professional Cyclists can do half a horsepower for ~the whole day~. Track cyclists, can do several horsepower for seconds, a couple horsepower for a minute, and a full horsepower for a few minutes. It's downright shocking.
(Coming from a cyclist who can do 1/10 of a horsepower continuous...)
To add somethign productive. A "really safe" airplane, can climb better than it's glide. I wonder what's the lowest horsepower we could get that happening with.
Well, depends on speed required. A human powered aircraft can fly on half horsepower with not much speed or climb ability.
The Solar Challenger is more practical with two 3 horsepower motors and 40 mph top speed and ability to handle turbulence. https://en.m.wikipedia.org/wiki/MacCready_Solar_Challenger
Might need help from DuPont to pay for it, however.
When talking about hp for a cheap airplane it is as much about hp for weight for money as it is about hp. So put as much hp on as the design will carry and you can afford and if it doesn't work … oops!
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