Pietenpol-List: wood gear progress
Posted: Tue Apr 14, 2009 11:22 pm
Original Posted By: "carson"
Interesting points you guys are bringing up. A cleaner plane wouldn't necessarilyhave a higher stall speed, as there are different types of drag, weight figuresin, and so forth. However if you look at articles on improving a plane byreducing its drag, they indicate you can improve top speeds by about 15 mph,improve economy a bit (on an older style plane circa 1920's-30's) and that a sideeffect is usually the landing speed/stall speed going up along with the highercruise speed.Why would I want a stall speed lower than 30? Same reasons given, better controlat low speed, larger safe operating speed range, possibly shorter takeoff roll,ability to clean an obstacle quicker. (Those things the VG selling guys claim.)Safety might be better if it meant when things went terribly wrong you were atthe slower speed, however that is doubtful, since there are so many ways to getin trouble.The VG's I was thinking of were the 100 for $100 inexpensive ones, and it was mostlythoughts of S.T.O.L. performance dancing in my head, that prompted me toask if anyone had tried them. Most piets in my opinion are not going to have great performance on take offs,as their power to weight ratio isn't that great. I have flown a 65 hp champ thatgot off the ground quick, but it didn't compare well with the 85 hp cub weused to have, and that paled next to 150hp super cubs, the three planes differingprimarily in raw horse power. I would suspect the 100hp piets climb out muchbetter than 65hp ones and those climb better than the model A ones.If you watch some of the clips on the landshorter website (the one with the inexpensivevortex generators), it can make you want something that could fly likethose planes.Losing some of my weight and flying light with no passenger would probably accomplishmore than I would ever need around here. The aerial specs have it's takeoff roll as 250 feet and stall around 30knots/35mph. That is pretty short/slowfor any plane, but if it would be slower/shorter/safer and possibly more fun,I might consider trying them out.JimRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: wood gear progress
Interesting points you guys are bringing up. A cleaner plane wouldn't necessarilyhave a higher stall speed, as there are different types of drag, weight figuresin, and so forth. However if you look at articles on improving a plane byreducing its drag, they indicate you can improve top speeds by about 15 mph,improve economy a bit (on an older style plane circa 1920's-30's) and that a sideeffect is usually the landing speed/stall speed going up along with the highercruise speed.Why would I want a stall speed lower than 30? Same reasons given, better controlat low speed, larger safe operating speed range, possibly shorter takeoff roll,ability to clean an obstacle quicker. (Those things the VG selling guys claim.)Safety might be better if it meant when things went terribly wrong you were atthe slower speed, however that is doubtful, since there are so many ways to getin trouble.The VG's I was thinking of were the 100 for $100 inexpensive ones, and it was mostlythoughts of S.T.O.L. performance dancing in my head, that prompted me toask if anyone had tried them. Most piets in my opinion are not going to have great performance on take offs,as their power to weight ratio isn't that great. I have flown a 65 hp champ thatgot off the ground quick, but it didn't compare well with the 85 hp cub weused to have, and that paled next to 150hp super cubs, the three planes differingprimarily in raw horse power. I would suspect the 100hp piets climb out muchbetter than 65hp ones and those climb better than the model A ones.If you watch some of the clips on the landshorter website (the one with the inexpensivevortex generators), it can make you want something that could fly likethose planes.Losing some of my weight and flying light with no passenger would probably accomplishmore than I would ever need around here. The aerial specs have it's takeoff roll as 250 feet and stall around 30knots/35mph. That is pretty short/slowfor any plane, but if it would be slower/shorter/safer and possibly more fun,I might consider trying them out.JimRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: wood gear progress