Mytyweav(at)earthlink.net
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 Posted: Sat Sep 13, 2008 8:53 am Post subject: HR 2 - looking to make my HR2 faster |
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Andrew.... You need to remember that you have a Lycon Engine..... Their dyno is always very proud of their engines. I think they have a dial they can rotate to give you the results on paper that you want to see. However, in real practice, their engines make about the same power as everyone elses.
I did note a post from Lee.... It contains all of Dave Ander's stuff that really makes a difference. If you want to increase your speed, revise your cowling and reduce your cooling drag. That is where a BIG chunk of speed goes away.....
Weav
ACTIVE NZ - Andrew wrote: [quote] [quote]Hi guys. I'm about to get serious about getting a little more speed out of my Rocket. I think it's, maybe, 10 knots (or more) slower than many of the HRs/F1s I read about. TAS in level flight seems to be a hair under 200 knots, WOT, at any altitude under 8000 feet. I'm wondering if anyone has any recommendations as to resources, ie, where can I start looking for information about how to tweak a little more speed out of an aircraft? Any books, websites, companies or other resources out there on this subject? I'm presuming it's mainly about drag, cos I have a good condition 280 hp engine, and a ROC that's as good as any I've read about. I note that the elevator is down quite a bit in cruise, and wonder if could be robbing a few knots? The aircraft also flies with a constant very slight right hand aileron down to maintain wings level, and also has a couple of external antennae. Anyone care to comment on whether any of this stuff makes much of a difference? As I understand basic aerodynamic theory, parasitic drag is squared, in terms of its impact on airspeed, so I'm wondering if even the really small things matter when you're talking about c 200 knots? Also,the cockpit isn't well sealed. I have a flip-over canopy, and when it's closed, there's still a 5 mm gap. Is this important? Anything else that should be looked at? At this stage, a turbine is out of the question  Last question, I guess, is the most important. Am I being unrealistic in hoping to see TAS of 210 knots???? I'd really appreciate any comments you guys might have on this matter. I know there's a wealth of experience out there... Andrew (NZ) --
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