Hirtenberger 4 Stroke engines?
12-13-2011, 08:46 PM
#1
Thread Starter
Hirtenberger 4 Stroke engines?
Hey Guys, I've notived afew Hirtenberger engines recently on Ebay for sale..
These are apparently "shaft driven rotary valve" small engines...look pretty much like your generic 4 Stroke except teh shaft is clearly visible in a housing on rear of engine, carb is mounted in front ( not agreat idea but probably unavoidable )
Does anbody have any experience with these? are they tricky to run and keep tuned? they look very well made.
Wondering if there any advantages besides how they look and function powerwsie to and OS or Saito for example.
Thanks all
These are apparently "shaft driven rotary valve" small engines...look pretty much like your generic 4 Stroke except teh shaft is clearly visible in a housing on rear of engine, carb is mounted in front ( not agreat idea but probably unavoidable )
Does anbody have any experience with these? are they tricky to run and keep tuned? they look very well made.
Wondering if there any advantages besides how they look and function powerwsie to and OS or Saito for example.
Thanks all
12-14-2011, 04:35 AM
#2
RE: Hirtenberger 4 Stroke engines?
The HP VT series engines are pretty good running engines. They last a long time and are easy to maintain as they do not use poppet valves which requires adjusting from time to time.
The engines are also amazingly quiet compared to other like engines. They are not as powerful as the Saito or OS engines though. But they are still very useable and flyable though.
But the little VT-21 and VT-25 engines would arguably be the smallest production 4 stroke engines you can get now as OS and Saito have gone with ever larger displacement engines over time.
MECOA still manufactures the engines too http://www.mecoa.com/hp/index.htm so there is some parts availability for them should you need it.
MECOA bought the rights, tooling, parts and stuff from HP when they quit making model engines.
The HP VT series consists of a VT-21, VT-25, VT-49 engines. HP itself made a number of VT-61 engines but not for long though, so it tends to be relatively rare. They did make a RC car version for a while with more cooling fins on it too.
MECOA's guide on running and caring for the engines http://www.mecoa.com/hp/vt/guide.htm
XJet's Video clip of using and flying a HP VT engine.
[youtube]http://www.youtube.com/watch?v=5jvViV4aW74[/youtube]
The engines are also amazingly quiet compared to other like engines. They are not as powerful as the Saito or OS engines though. But they are still very useable and flyable though.
But the little VT-21 and VT-25 engines would arguably be the smallest production 4 stroke engines you can get now as OS and Saito have gone with ever larger displacement engines over time.
MECOA still manufactures the engines too http://www.mecoa.com/hp/index.htm so there is some parts availability for them should you need it.
MECOA bought the rights, tooling, parts and stuff from HP when they quit making model engines.
The HP VT series consists of a VT-21, VT-25, VT-49 engines. HP itself made a number of VT-61 engines but not for long though, so it tends to be relatively rare. They did make a RC car version for a while with more cooling fins on it too.
MECOA's guide on running and caring for the engines http://www.mecoa.com/hp/vt/guide.htm
XJet's Video clip of using and flying a HP VT engine.
[youtube]http://www.youtube.com/watch?v=5jvViV4aW74[/youtube]
12-15-2011, 08:35 PM
#3
Thread Starter
RE: Hirtenberger 4 Stroke engines?
Thanks Earl for the good info... very interesting ...nice looking and running little engines...a bit tricky with the fuel Castor oil ratios but no biggie.
Got me thinking
Got me thinking
