Good first speed plane?
03-08-2015, 11:06 AM
#26
Find the local pylon guys and find out who has some of the older Nelson short-stroke engines. They are now "obsolete" because of the newer long-stroke version. Short-stroke engines can be had cheap if you look around. I just got one with a spare P/L set for under $100.
03-08-2015, 09:40 PM
#29
Thanks, but I'm all "engined out"...! I shouldn't even joke about getting any more engines....enough is enough.
My first "Speed Plane was a ACE RC GLH with a Cox TD .049. It sounded like it was going 200 mph, but it was probably able to hit 80 - 90 mph in a dive. Regardless, it seemed like a really fast plane at the time and it was pretty thrilling.
After that I took spare wing cores from my 1/2 A Combat "program" and built a .15 powered speedster with just 2 channel control. Nothing fancy, similar to a Q-500 layout [more like Q-250] and that satisfied my need for speed for awhile. With an old SuperTigre .15 combat engine and 7 x 5 pylon props it had great "sound effects" and it was fast enough to scare the spectators.
With very little cash and effort it was possible to have some fun going fast. Small planes don't put up the big numbers, but they will seem fast to anyone who has never flown anything as small.
My first "Speed Plane was a ACE RC GLH with a Cox TD .049. It sounded like it was going 200 mph, but it was probably able to hit 80 - 90 mph in a dive. Regardless, it seemed like a really fast plane at the time and it was pretty thrilling.
After that I took spare wing cores from my 1/2 A Combat "program" and built a .15 powered speedster with just 2 channel control. Nothing fancy, similar to a Q-500 layout [more like Q-250] and that satisfied my need for speed for awhile. With an old SuperTigre .15 combat engine and 7 x 5 pylon props it had great "sound effects" and it was fast enough to scare the spectators.
With very little cash and effort it was possible to have some fun going fast. Small planes don't put up the big numbers, but they will seem fast to anyone who has never flown anything as small.
03-12-2015, 10:46 AM
#30
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So my LHS didn't quite have any of the props I wanted to try, so I tried what I had which was a 10*7 APC on a ST G51 running wildcat 18*20, I leaned it as far as I dared, and got to almost 17000. Still smoking and no sign of sag. If nothing else it sounded cool. I'm not going to use one of the engine I have on hand though, I'll buy something more fitting. Was just curious. I have a 9*6 APC, but I don't dare try it. Or will I ? Lol.
03-12-2015, 03:57 PM
#34
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9-6 is a little light on load for a sport timed .50-.55 engine. Won’t hurt the engine, but you’ll probably take better advantage of the available power with a prop more like 9-8. Many of the guys here have found that on sport speed aircraft powered by decent .45-.50 engines, the APC sport 9-8 gives great performance. Specific notes on the ST engine I ain’t got, but it's a decent sport .51, so..
03-30-2015, 09:46 AM
#35
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Bing a curious fellow, I just had to see what I could get out of a 9x8 prop so I picked one up. I half expected a little more from it. She peaked at 15400 and low was just under 3000. 28 or 29 I think. That was with only 15 % nitro. I'm sure with 20 % would get a few hundred more. The sound of it makes me want to fly something fast even that much more. 
