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2nd 2021 2m F3-RES, F5-RES 14 day Duration Challenge
GuyB replied to martynk's topic in Thermal and F3J
Hi I use an Aurora 9 which I love and am invested in re receivers etc. It does not have voice but beeps every minute. I quickly lose count of the beeps -
Thanks Martyn - I only got confused because Jon W had mentioned "70m" earlier, hence my question.
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2nd 2021 2m F3-RES, F5-RES 14 day Duration Challenge
StraightEdge replied to martynk's topic in Thermal and F3J
Guy, I meant to reply to this earlier: why not set your TX timer to give a voice-readout every minute? Jon -
Hi Ian , Yes the pink Auri is still available
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It's on each challenge OP: 1. a bungee-launched glider up to 2 metres wingspan and the standard Hi-Start can post a time. The standard Hi-Start bungee is a maximum of 10m of 6/4mm surgical tubing and 50m of static line (minimum 30lb breaking strain). Lighter/smaller bungee rubber may be used. OR 2. an Electric motor launched glider up to 2 metre wingspan fitted with an Altitude Limiter set to 60m and a maximum motor run time of 20 seconds
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Is the pink Auri still available?
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Hi Martyn and Jon Thanks for the replies, most informative and helpful - and completely happy to work to 20secs and/or 60/70m (which is it?). By the way, my current launches with the 320g PuRES do vary: no activity then say 50-60 meters, if some ambient wind (and I launch almost vertically and work the line on the way up without fouling things) then 60-70m, if into a boomer then have recorded 80-90m. I'm not fully sold on going electric (love the simplicity and low cost/complexity of bungee) but thinking about it... As I said earlier, the primary advantage of electric is that it w
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2nd 2021 2m F3-RES, F5-RES 14 day Duration Challenge
Graham Lorimer replied to martynk's topic in Thermal and F3J
I will always try to circle out of the indicated lift, and to complete the circle back into where I think the center of the thermal may be, potentially that reduces the energy and forward momentum loss, something you really do not want with a lightweight model. Just my thoughts. Graham -
2nd 2021 2m F3-RES, F5-RES 14 day Duration Challenge
martynk replied to martynk's topic in Thermal and F3J
No, the other way round, if one wing stalls and drops I turn into it rather than away as the model is trying to turn in that direction anyway -
2nd 2021 2m F3-RES, F5-RES 14 day Duration Challenge
martynk replied to martynk's topic in Thermal and F3J
Regarding thermalling, my experience is with F1A glider which normally have the inboard wing flying at a slightly higher angle of attack. In a thermal or up current, the inboard wing will stall sooner, drop and the model will turn sharply into the stall. Mined ewes, free flight gliders have much smaller vertical stabilisers and therefore less yaw control/damping. I really need to get out and fly more.. -
Looks like ridge lift to me.
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Very interesting, and is this into ridge lift or do you seek thermals from there? or is it just a quick run to the bottom and start again?
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2nd 2021 2m F3-RES, F5-RES 14 day Duration Challenge
GuyB replied to martynk's topic in Thermal and F3J
Sounds logical. I definitely lose more height trying to turn into it than going round -
PROGLIDE – Home Built Composite F5J Glider - Update October 2018
Jef Ott replied to ThermalBoy's topic in Electric Soaring and F5J
T-tail should be a good config for height limiter cut off models, because the Bernouli effect of the faster air under the tail requiring down trim during the power-on phase (so it should kill the stall itself when the motor cuts). Does anyone use height limiters now? -
nice one Phil ....superb
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Radioglide 2021 - 41st Festival of Flat Field Soaring May 29th to 31st 2021. Arrangements are being made for Radioglide 2021 to take place at the BMFA National Flying Centre, Sewstern Road, Buckminster, Grantham, NG33 5RW All events are open entry, however, competitors must be BMFA members. F5J will take place on Saturday May 29th & Sunday May 30th and will be run as a two day event counting towards BARCS & BMFA leagues and will be a Team Selection event. The Radioglide F5J Champion will be the winner of the two day event. There will however be an award for the best perf
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2nd 2021 2m F3-RES, F5-RES 14 day Duration Challenge
Graham Lorimer replied to martynk's topic in Thermal and F3J
I have a Hacker A10-7L motor / gearbox combination. Very lightweight. On a 3S battery it draws 9.5 amps. Graham -
2nd 2021 2m F3-RES, F5-RES 14 day Duration Challenge
StraightEdge replied to martynk's topic in Thermal and F3J
Not hugely experienced yet but have so far found the following: by following the turn started by the thermal kicking one wing up, speed and smooth flying is maintained and one gets quickly round back into the thermal, with the whole model then lifting nicely as you enter it squarely on. Cranking the model the other way - ostensibly the shortest route - seems draggier and risks a slower-speed stall just when you don't want it. -
Bladders can be useful as well. I’ve used bicycle tyres in the past.
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Sometimes the dust from the sanding can cause a problem. Get rid of as much dust as you can. While less glue is better, I find it's better to brush some epoxy over the area the cloth is going to go before applying the cloth. Pressure is really the key to getting a good stick though. Heat helps but it makes it go off quicker it doesn't help if the mechanical adhesion isn't good. I use peel ply which allows you to uses layer of tissue or similar to absorb epoxy between the cloth and whatever is giving you the pressure (tape, clasps etc). Doing the inside is harder. Outside yo
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PROGLIDE – Home Built Composite F5J Glider - Update October 2018
Nicholls replied to ThermalBoy's topic in Electric Soaring and F5J
Colin is continuously experimenting most things from boom lengths to tail types. Here is his T tail version as flown in the Kent Interclub/ Bartletts competition at Gravesend on Sunday 18th April 2021. Looks especially magnificent at higher altitudes where it was most of time. He won! Photos by Mike Connell -
2nd 2021 2m F3-RES, F5-RES 14 day Duration Challenge
Whitmore replied to martynk's topic in Thermal and F3J
Good point Graham - I hadn't thought of the over weight/overthrust option. What motor/battery do you have in your Purito? In theory the wing nearest the thermal will be experiencing greater angle of attack and so roll away from the lift. I think Martyn is describing where that AOA is so extreme as to cause asymmetric stall then wing drop - which would have the model to appearing to roll towards the thermal. A well designed wing should roll away in most circumstances. Either way you're seeing an indication of where the lift is and you need to get into it. If the roll is extr -
How to launch a glider - just roll it down the hill ! (roll the vid to 1:00 if you're feeling impatient...) I've flown full-size bungee launch off the Long Mynd, but this looks even more fun Phil.
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2nd 2021 2m F3-RES, F5-RES 14 day Duration Challenge
GuyB replied to martynk's topic in Thermal and F3J
So if the left wing drops you turn right on the basis that the thermal has pushed up the right wing abs turning right should take you into the lift? whereas I do the opposite but probably circle round into it -
F5J - Lt. Bentley, Essex - Sunday 25th April 2021
tonym replied to tonym's topic in Electric Soaring and F5J
Forecasts looking OK through weekend, usual thing, I'll make a go or no-go announcement around 6pm Saturday.
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