DA-50R vs DA-100L Vibration
06-13-2011, 07:48 PM
#1
Member
Thread Starter
Join Date: May 2003
Location: Stillwater,
OK,
Posts: 39
Likes: 0
Received 0 Likes
on
0 Posts
DA-50R vs DA-100L Vibration
Hello,
I have what some may consider an odd question: For anyone who has experience running a DA-50 and a DA-100, running at about the same rpm, can you notice a significant difference in vibration? We have a research application where power is not an issue, but what we want to fly is very sensitive to vibration. I assume a horizontally opposed engine would run smoother than a single cylinder engine. We plan to properly mount with all of the best isolation gear, but I would like to limit the source of vibration, even if it means getting a heavier engine.
Thanks in advance...
I have what some may consider an odd question: For anyone who has experience running a DA-50 and a DA-100, running at about the same rpm, can you notice a significant difference in vibration? We have a research application where power is not an issue, but what we want to fly is very sensitive to vibration. I assume a horizontally opposed engine would run smoother than a single cylinder engine. We plan to properly mount with all of the best isolation gear, but I would like to limit the source of vibration, even if it means getting a heavier engine.
Thanks in advance...
06-13-2011, 07:59 PM
#2
My Feedback: (19)
RE: DA-50R vs DA-100L Vibration
Yes, an opposed twin is smoother than a single.
Do you need a 100cc engine for your project? No, I'm not selling one but do have some suggestions for another engine if you can get by with something smaller. That would be a Zenoah GT-80 twin converted to electronic ignition. Incredible smoothness from idle to full throttle .... quite a bit smoother than the DA=100.
Do you need a 100cc engine for your project? No, I'm not selling one but do have some suggestions for another engine if you can get by with something smaller. That would be a Zenoah GT-80 twin converted to electronic ignition. Incredible smoothness from idle to full throttle .... quite a bit smoother than the DA=100.
06-13-2011, 10:09 PM
#4
Member
Thread Starter
Join Date: May 2003
Location: Stillwater,
OK,
Posts: 39
Likes: 0
Received 0 Likes
on
0 Posts
RE: DA-50R vs DA-100L Vibration
ORIGINAL: Tired Old Man
The 50 has about 40% more vibration. You cannot completely counter balance a single without adding pounds to the crank.
The 50 has about 40% more vibration. You cannot completely counter balance a single without adding pounds to the crank.
Also, thanks for the reply truckracer. 50cc would be enough power for me, but I am concerned about the vibration. I have never tried a Zenoah before. My experience has been with DA and Fuji engines.
06-14-2011, 04:51 AM
#5
RE: DA-50R vs DA-100L Vibration
ORIGINAL: A5fly
Wow that is quite a bit more! I am not doubting you, I was just wondering how you know the 40% number. HAve you seen it measured somehow? That number would be very useful to me if true.
ORIGINAL: Tired Old Man
The 50 has about 40% more vibration. You cannot completely counter balance a single without adding pounds to the crank.
The 50 has about 40% more vibration. You cannot completely counter balance a single without adding pounds to the crank.
Karol
06-14-2011, 05:36 AM
#6
Senior Member
My Feedback: (1)
RE: DA-50R vs DA-100L Vibration
I work with stuff that has similar issues with vibration and vibration isolation. You cannot eliminate combustion impulses but you can isolate the "sensitive" items from them. Takes a lot of mechanical and software engineering at both ends of the unit. Looks like you're out in an area that recently obtained a CoA at an airport.
