Originally posted by Radar-Guy
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Official Freewing 80mm EDF L-39 Albatros Thread
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Originally posted by Radar-Guy View PostMy calculations showed 100%, there's really no noticable difference during take-off.
Freewing L39 Albatros 80mm edf, 1055mm span 1351mm length 2200gm dry weight, FMS 80mm 12blade edf (320gms)with 6s 3280-2100kv inrunner producing 3500g thrust. weight with 4500mah 40c zippy compact s (720g) AUW incl rx &bec 2965gms power to weight = 1.18 to 1.Cheeter fan 3300mm2, cheeter fan with mesh 2300mm2.main inlet ducts3250mm2 fan dia area 5025mm2, motor area 960mm2 so fan swept area4065mm2. inlet air with mesh covered cheater fan 5650mm2. separate BEC set at 5V.
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Originally posted by steven gubala View Postwhat is everyone using for expo on their planes? I'm using a spektrum dx9 transmitter and a spektrum AR 637T receiver, any help would be great.
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Lost my L-39 at the weekend in the desert. flew too far out for the return leg for landing and in the heat haze/dust it just disappeared! i cut the throttle and hoped for the best after waiting a few seconds to see if the haze cleared but it never appeared again, after 2 1/2 hours walking in the dubai desert with no water i had to give up before i became a victim of the heat myself. Damm i miss this jet was a wonderful aircraft to fly.
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First flight with my L39, lots of stuttering from FMS motor, took out100amp esc and separate bec, installed the following :-
Freewing L39, 1050mm ws 23.6dm2. 3kg with rhino 4000mah 50c battery WL about 130gms/dm2.
FMS platinum pro 3280 2100kv in-runner,ceramic bearings 3.5kg thrust, 120amp Turnigy 32 plus HV 2-8s with 8amp bec esc timing low at 6 deg. Pwm freq 12K.( 52500rpmx4/20 = 10.5and esc card states 8k or 12k ) start up power 10%, brake off , lipo cells on auto, cut off voltage 3.3v, temp protect 140degc. Auto rotation off moto type normal, bec voltage 5.5v Power to weight = 1.15 to 1.0. Full throttle 24.9v 103 amp 2380 watts static on power meter.
Balanced fan with table vibration method,running smooth now, any thoughts before I take to the skies again ?
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First 3 flights with L39 went ok but I prefer the sound of the freewing 80mm so I bought one, installed it, very happy with sound. Not quite the thrust of the fms fan but ok. I asked Motion for performance figures of the 9 blade and was told freewing did not give them any info and they would not give me any esc settings stating that the fan was designed to be used with their esc. I consider that a poor response. How am I supposed to check fan performance if I do not have basic figures ? Here are Freewing figures which I obtained from Ali express within an hour of reading the motion r.c.reply
https://fr.aliexpress.com/item/40010...19419660%22%7D
power meter readings taken this lunchtime in the model, static 24.9v 86a 2013w Turnigy plush 32 120 amp HV esc with 8 amp bec, timing on auto, pwm 12k. moto type edf. Here are the figures from the highlighted Ali Express site :- Fan ref E72313 3658 1920kv 3350-3450 gms thrust 85-91amps 100amp esc wt 285gms 2100 watts
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Originally posted by Gripper39 View PostLost my L-39 at the weekend in the desert. flew too far out for the return leg for landing and in the heat haze/dust it just disappeared! i cut the throttle and hoped for the best after waiting a few seconds to see if the haze cleared but it never appeared again, after 2 1/2 hours walking in the dubai desert with no water i had to give up before i became a victim of the heat myself. Damm i miss this jet was a wonderful aircraft to fly.
I can sympathize, I lost mine in the AZ desert this past weekend after 4 1/2 flights. I was liking it so much though I'm already thinking of another.
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YouTube: https://www.youtube.com/user/motionsic
Facebook: https://www.facebook.com/FPVAirCombat
Instagram: https://www.instagram.com/fpvaircombat/channel/
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I flew a Xfly Sirius against my friend’s FW L-39 in exciting dogfight from cockpit view using head-tracking FPV. The L-39 gets small quick (it’s fast) Which one came out on top?YouTube: https://www.youtube.com/user/motionsic
Facebook: https://www.facebook.com/FPVAirCombat
Instagram: https://www.instagram.com/fpvaircombat/channel/
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And "keeping up foreign relations" cause he was invertedYouTube: https://www.youtube.com/user/motionsic
Facebook: https://www.facebook.com/FPVAirCombat
Instagram: https://www.instagram.com/fpvaircombat/channel/
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Dude,
The dual FPV setup would be ideal for dogfight! Back seater acting like goose to keep an eye on bogey and front seater maneuvering for the shot. If only the analog setup had better resolution... I had a hard time spotting the bogey during the head-on pass even with digital HD. It's barely a speck in the goggles and flash by so fastYouTube: https://www.youtube.com/user/motionsic
Facebook: https://www.facebook.com/FPVAirCombat
Instagram: https://www.instagram.com/fpvaircombat/channel/
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Short ones don’t help much, need at least 10-15 ft long to be visible at all.YouTube: https://www.youtube.com/user/motionsic
Facebook: https://www.facebook.com/FPVAirCombat
Instagram: https://www.instagram.com/fpvaircombat/channel/
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