Christopher Braun's Posts - Zenith Aircraft Builders and Flyers2024-03-29T09:47:16ZChristopher Braunhttps://zenith.aero/profile/ChristopherBraunhttps://storage.ning.com/topology/rest/1.0/file/get/2197118505?profile=RESIZE_48X48&width=48&height=48&crop=1%3A1https://zenith.aero/profiles/blog/feed?user=228zxwot6o8fo&xn_auth=noHirth engines for 750tag:zenith.aero,2013-01-12:2606393:BlogPost:2598572013-01-12T20:00:00.000ZChristopher Braunhttps://zenith.aero/profile/ChristopherBraun
From what I can tell, the Hirth 3003 engine is only 137 lbs dry. I think I might need a psru with it, because peak torque is at 6000 rpm, but if I am saving 100 lbs in dead weight, wouldn't I be able to get the performance out of an engine like this? Or even their 80 hp model?<br />
<br />
Would I even need a psru, if I used a smaller prop?<br />
<br />
It is only $10k new with starter and fuel injected, and obviously really really light, which would help useful load if built to 1440 gross weight.<br />
<br />
Any thoughts? Is…
From what I can tell, the Hirth 3003 engine is only 137 lbs dry. I think I might need a psru with it, because peak torque is at 6000 rpm, but if I am saving 100 lbs in dead weight, wouldn't I be able to get the performance out of an engine like this? Or even their 80 hp model?<br />
<br />
Would I even need a psru, if I used a smaller prop?<br />
<br />
It is only $10k new with starter and fuel injected, and obviously really really light, which would help useful load if built to 1440 gross weight.<br />
<br />
Any thoughts? Is the torque enough to power the plane? Do I need a psru? Is two stroke bad vs corvair?<br />
<br />
Here are the specs and power curve<br />
<br />
<a href="http://www.recpower.com/3002%202%20cycle%2080hp.htm">http://www.recpower.com/3002%202%20cycle%2080hp.htm</a><br />
<br />
If I save 100 pounds, any reduction in torque or hp (although it is a 110 hp) would seem to be offset. That is 20 percent of useful load. seems like it would beat an 0-200 at 270 lbs installed, bc it increases useful load by 100 pounds, which is 20% of plane's total useful load.<br />
<br />
CB