I'm calling it The Little Mermaid

("Larry Dighera" wrote)
It's an interesting design. Is it a home built?


I didn't get the feeling from their web page it was being offered for the
homebuilt market.

http://www.hp-aircraft.de/edoc/news.html
Looks like a start-up company - news.

Now, The Little Mermaid, that would be a homebuilt :-)


Montblack

2
"John Ammeter" wrote in


Hmmm 594 pounds useful load?? Ok, that's Oyster and me if
we don't bring any baggage. You can take the train and meet
us there...

John

No, just stop every 30 minutes or so, for fuel. g
--
Jim (ducking) in NC

"Montblack" wrote

Wonder if for all the trade-offs and compromises, you gain anything with
one
engine and two pylon props?


Montblack

I think so. Not too far off from my musings. Take a liquid cooled
motorcycle engine, run dual drive belts, one out each of the pylon mounts,
and with the smaller diameter props, you could run them faster to take
advantage of the high revving engine. You get to use Harley sized drive
belts and sprockets, readily available in junkyards everywhere. (the
sprockets, I mean)

I read about some guy that was running a motorcycle engine, and even
shifting in flight for cruise.

My ideal sport plane would be an amphibian, if they get the rotating landing
gear back in.
--
Jim in NC

Montblack wrote:

(Scroll down in the link to the front-on view of the plane to see what I
mean)

This link has the head-on photo (part way down the page)
http://www.hp-aircraft.de/edoc/news.html

I get "error 404: Datei nicht gefunden! Das angegebene Dokument konnte auf
diesem Server leider nicht gefunden werden." on both of those links.

First time I've seen that in Deutsch.

George Patterson
I prefer Heaven for climate but Hell for company.

On Mon, 14 Mar 2005 17:02:17 -0800, "Rich S."
wrote:

"John Ammeter" wrote in message
.. .

Hmmm 594 pounds useful load?? Ok, that's Oyster and me if
we don't bring any baggage. You can take the train and meet
us there...

I'm thinkin' we need three of them and we could start an aerobatic team. Das
Wunderkind??

More like, "Das Whatderfuq" :-)


Ron Wanttaja

George Patterson wrote:



Montblack wrote:

(Scroll down in the link to the front-on view of the plane to see what I
mean)

This link has the head-on photo (part way down the page)
http://www.hp-aircraft.de/edoc/news.html

I get "error 404: Datei nicht gefunden! Das angegebene Dokument konnte auf
diesem Server leider nicht gefunden werden." on both of those links.

First time I've seen that in Deutsch.

George Patterson
I prefer Heaven for climate but Hell for company.


Both links worked here!
Sorry g
John

Take a liquid cooled
motorcycle engine, run dual drive belts, one out each of the pylon mounts,
and with the smaller diameter props, you could run them faster to take
advantage of the high revving engine.

Engines run better when fast, props work better when slow. If you're
using a belt drive anyway, there's no point in running the props fast.
Let the belt apply the high engine speed to a large, slow prop.

Jose
(I left r.a.homebuilt in, though I don't follow that group)
--
Math is a game. The object of the game is to figure out the rules.
for Email, make the obvious change in the address.

UltraJohn wrote:

Both links worked here!
Sorry g

No problem. I chopped it back to http://www.hp-aircraft.de/edoc to get to the
main page and clicked on menu items to see the rest.

George Patterson
I prefer Heaven for climate but Hell for company.

"Jose" wrote

Engines run better when fast, props work better when slow. If you're
using a belt drive anyway, there's no point in running the props fast.
Let the belt apply the high engine speed to a large, slow prop.

Jose
(I left r.a.homebuilt in, though I don't follow that group)

You are missing the point. Take a small engine, divide the output in half,
and the prop is going to be small. Small props do not mind turning fast.
Also, if you use the belts for the RPM reduction, you have to put the big
pulley out on the pylon, where you want a small one.
--
Jim in NC

You are missing the point. Take a small engine, divide the output in half,
and the prop is going to be small.

Why?

Small props do not mind turning fast.

No, they don't mind at all. But as I understand it they aren't as
efficient as large props turning slowly.

Also, if you use the belts for the RPM reduction, you have to put the big
pulley out on the pylon, where you want a small one.

Or you use a gear at the engine. Point is, once you're not direct
drive, the engine speed is no longer required to be the same as the prop
speed.

Jose
(r.a.homebuilt left in, though I don't follow that group)
--
Math is a game. The object of the game is to figure out the rules.
for Email, make the obvious change in the address.