"1/2 A" & "1/8 A" airplanes These are the small ones...more popular now than ever.

pylon racer plans

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Old 01-17-2019, 05:53 AM
  #26  
Zonker40
 
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Very nice! A few years ago we had an active racing group racing electric planes with 200 sq in wing areas, 3 cell 1350 mah batteries, and small motors with 2200 kv. We were getting 105-110 mph on a 375' course. One race I timed had the leader doing laps at 6 1/2 seconds. Interest gradually died out, then I got a bunch of folks racing EF-1, while some others were doing sport quickie. Alas, all of that has now died out in my area. When I get a moment, I will post some pics and plans of our racers Our planes were around 42" spans and weighed 15-16 oz RTF.
Milt

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Old 01-17-2019, 11:15 AM
  #27  
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Default 1/2A Size Racing



Lancers 2 and 3


Lancer 3 before covering - wing is glued on


One of our main designs was the Lancer, designed by Kimberly Panos, who happened to dominate our E-200 racing. We started out with about 15 pilots and were having a ball. We specified the motor and battery, and 200 sq in wing area min, and let folks choose their props and plane designs. The Lancer was very successful. I built 4 or 5 of them. When our primary motor (TowerPro 2409-12T became unavailable, we went to 3 equivalent motors (Power up Zoom 400, Turnigy D2826-6 2200 KV, and RC Timer BC2826 2200KV) and most pilots used the APC 5.25 x 6.25 props. I experimented with Graupner 6.5 x 6.5 props which gave me more thrust off the start line, keeping me ahead of the pack, until the higher amperage draw started slowing me down, and Kimberly would slip past me about lap 7 . Anyway, we had loads of fun and high adrenaline rushes for 3-4 years, racing 9 months of the year from March to early Nov. Attached are some pics, plus a plans drawing .pdf which you could print or enlarge to any size you would like. It builds pretty fast and is quite strong. I will also include some root and tip templates which you would have to play with to get the right sizes, as we used foam wings (blue foam from Home Depot) which were sheeted with 1/16' balsa to start with, although some folks added some CF strips under the balsa and went to 1/32" sheeting. Most folks used surfacing resin and weighted surfaces to apply the balsa skins, but I finally went to vacuum bagging which really worked great. Like I said in the last post, we got up to 105-110 mph and couldn't fly straight for more than 2 seconds without losing sight of the plane. I usually counted 1 1/2 seconds between pylon 3 and 1 before initiating my turn. I have gotten too old to do this anymore (turned 75 last month), but the memories get the juices going again. Fair skies to you1
Milt
Attached Files
File Type: pdf
Lancer-C Plans.pdf (293.4 KB, 26 views)
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Old 01-18-2019, 06:41 PM
  #28  
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Thank you Milt for sharing I have been to the Utah site to view pics / plans and noted Kim's good efforts for the club.
I know one club member Mel / Melvin who was part of the 1/2A movement before it switch over to electric.

Taking those plans I modified it a bit to work better with 1/2A - note the tail moment was a bit short for the size
tail feathers keeping the feathers the same size I elongated moment arm. Will help the plane sit solid in the
air with less elevator throw and help generate acceleration out of the turns into a steady locked in straight away.
Anytime the plane is pitching it's scrubbing off speed.

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Old 01-18-2019, 07:26 PM
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Interesting on the tail moment increase. I never had any problem in the turns - rock solid. My elevator movement was something around 3/32” - very small compared to most other planes. My EF-1’s also had small control movements. I did build one in canard configuration, but lost it on the test flight. I was flying it In Feb with a gray overcast and snow on the ground. With a white paint scheme, it simply disappeared to my eyesight about 2 seconds after launch. I could hear it, but could not see it. I finally pulled back the throttle and put in full up. A farmer found the pieces back by his barn (I knew about where it might have gone down, and distributed some flyers) and I got the pieces back. Stupid me, I wasn’t expecting that - hindsight told me I should have pulled a loop right off to get a top view of the wings, throttled back, and got it back in sight. It is on my wish list to build another, but since we are not racing anymore, it is low on the list
Milt
Mel Rogers is a very good machinist and engine guy. He has moved to the south of us now for a new job
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Old 01-18-2019, 10:17 PM
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- help generate acceleration out of the turns into a steady locked in straight away.
Anytime the plane is pitching it's scrubbing off speed. Shorter the tail moment the
more pitchy to the extreme of short is a combat wing.

Sorry to hear you lost your plane to bad viz. I have built all white with black lettering / numbers 4 times.
1 was 96" span another 82" / the other two smaller spans 1 was 34" other was 28" and those two did cause visual issues.
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