196
Slope Soaring / Battery flight time
« on: March 08, 2012, 00:45:02 AM »
sorry 2s lipo
John
John
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197
Slope Soaring / Battery flight time
« on: March 08, 2012, 00:22:41 AM »
Hi all,
I got this to teach me how to fly (fed up wrecking planes). I am using a 350mah lipo to power the 2 servos ubec and receiver, servos draw 200-240 ma. Am I correct in assuming approx 1/2 hour flight time?
Thanks
John
I got this to teach me how to fly (fed up wrecking planes). I am using a 350mah lipo to power the 2 servos ubec and receiver, servos draw 200-240 ma. Am I correct in assuming approx 1/2 hour flight time?
Thanks
John
198
Slope Soaring / today
« on: February 27, 2012, 20:34:17 PM »
Thanks for glue info Keith.I will try B&Q
John.
John.
199
Slope Soaring / today
« on: February 27, 2012, 00:33:04 AM »
Nice pics,
Thats a beautiful glider Jim flies. makes all the right sounds. I could'nt make Sat (work) but flew or should I say crashed a few models on the Sunday. Anyone know what gorilla glue is? I need some or something similar for a bluto wing thing.
John.
Thats a beautiful glider Jim flies. makes all the right sounds. I could'nt make Sat (work) but flew or should I say crashed a few models on the Sunday. Anyone know what gorilla glue is? I need some or something similar for a bluto wing thing.
John.
200
Thermal / Flat field / Supergee type DLG build
« on: February 25, 2012, 00:41:16 AM »
Hi Joe,
Looks like dancing to me. Just think Bruce Forsyth in tights and give it socks. I would like to try. Any chance of foam blanks?
John
Looks like dancing to me. Just think Bruce Forsyth in tights and give it socks. I would like to try. Any chance of foam blanks?
John
201
Thermal / Flat field / Supergee type DLG build
« on: February 18, 2012, 00:03:50 AM »
Hi Joe,
The penny has dropped. By the way does the mylar conform properly to the airfoil in all directions ie does it stretch in all directions or is it rigid and behaving as a sheet of paper would(creasing at wingtips).
Thanks John.
The penny has dropped. By the way does the mylar conform properly to the airfoil in all directions ie does it stretch in all directions or is it rigid and behaving as a sheet of paper would(creasing at wingtips).
Thanks John.
202
Thermal / Flat field / Supergee type DLG build
« on: February 16, 2012, 22:58:32 PM »
Hi Joe,
Whats the order of wing layup? Does the mylar go on first or after the cloth?
John.
Whats the order of wing layup? Does the mylar go on first or after the cloth?
John.
205
I'd rather be a hammer than a nail, yes I would, if I only could, I surely would. Yes I've played guitar all day to get this electrickery out of my head. Anyhow this is my pilot( back to basics), just have to carve him now, will try foam and see how I get on. Will post pics good or bad.
John.
John.
206
Hi Keith,
I think my only worry will be the maximum amp value.
Supposing the max power is 100watt with a 3 cell lipo at 11.1 volt = 9 amp
Max power with a 2cell will be approx 66watt (2/3 of 100) at 7.4v = 9 amp
So yes for a given achievable power output the lower voltage does draw more current but both at full power will draw the same. Does this look correct?
John.
I think my only worry will be the maximum amp value.
Supposing the max power is 100watt with a 3 cell lipo at 11.1 volt = 9 amp
Max power with a 2cell will be approx 66watt (2/3 of 100) at 7.4v = 9 amp
So yes for a given achievable power output the lower voltage does draw more current but both at full power will draw the same. Does this look correct?
John.
207
Club Talk / A Sticky Topic
« on: February 05, 2012, 01:00:27 AM »
Hi Keith,
I assume you mean the difference between epoxy and polyester resins. Epoxy when set looks less shiny than dry polyester resin and If you sand dried polyester it will smell like polyester wheras epoxy has a neutral smell and sands different but the smell of polyester never goes away.
John.
I assume you mean the difference between epoxy and polyester resins. Epoxy when set looks less shiny than dry polyester resin and If you sand dried polyester it will smell like polyester wheras epoxy has a neutral smell and sands different but the smell of polyester never goes away.
John.
208
Hi Keith,
Me disheartened! never. I relish a challenge. Yea with the higher rpm I think I will not turn the engine but perhaps try for a little friction freewheeling. I'm going with your motor recommendation which is what I also felt would be best and have ordered 8"x4" and 9"x6" props and also an 18amp esc. I ran the current motor flat out until the battery died and there was very little to no heating of the esc, I realise the new setup will be different due to higher loading so will test. If v/i=r then running on lower voltage(2 cell lipo) means pulling less amps so maybe 10amp esc will suffice. The worst part is waiting for the bits to arrive from Hong Kong but I am now getting stuck into the restoring of my dads old glider, it's an electric powered precedent from the mid ninties. The 1300mah nicad battery weighs more than the glider.
John.
Me disheartened! never. I relish a challenge. Yea with the higher rpm I think I will not turn the engine but perhaps try for a little friction freewheeling. I'm going with your motor recommendation which is what I also felt would be best and have ordered 8"x4" and 9"x6" props and also an 18amp esc. I ran the current motor flat out until the battery died and there was very little to no heating of the esc, I realise the new setup will be different due to higher loading so will test. If v/i=r then running on lower voltage(2 cell lipo) means pulling less amps so maybe 10amp esc will suffice. The worst part is waiting for the bits to arrive from Hong Kong but I am now getting stuck into the restoring of my dads old glider, it's an electric powered precedent from the mid ninties. The 1300mah nicad battery weighs more than the glider.
John.
209
Hi all,
I had some fun with my DH2 today. It's not finished yet but is flyable so I decided to give it a test run to check out the power output and just as well I did. It needs about twice as much thrust as I'm getting so I'm guessing I need an outrunner powered with a 3 cell lipo. The weight of the model without battery is 240 grms.
http://www.hobbyking.com/hobbyking/store/__5428__AX_2306N_2000kv_brushless_Micro_Motor.html
http://www.hobbyking.com/hobbyking/store/__5430__AX_2308N_1800kv_Brushless_Micro_Motor.html
http://www.hobbyking.com/hobbyking/store/__5427__AX_2306N_1300kv_Brushless_Bell_Motor.html
http://www.hobbyking.com/hobbyking/store/__6784__ZIPPY_Flightmax_800mAh_3S1P_20C.html
http://www.hobbyking.com/hobbyking/store/__6457__Hobbyking_SS_Series_18_20A_ESC.html
These are my choices as they have the beam mounts and will fit with little mods required. OK what do I choose? I want to run an 8" prop for scale reasons and I don't really want a revving noisy fecking thing. The model at present has a 10 amp esc fitted in it's bowels and if possible I would like to leave it there, but if necessary will replace. Prop suggestions? Perhaps running with 2 cell lipos and less rpm. I'm new to this electric and perhaps need a little guidance. I broke the undercarriage today and I am now redesigning for strength which is difficult due to its gangly nature.
John.
I had some fun with my DH2 today. It's not finished yet but is flyable so I decided to give it a test run to check out the power output and just as well I did. It needs about twice as much thrust as I'm getting so I'm guessing I need an outrunner powered with a 3 cell lipo. The weight of the model without battery is 240 grms.
http://www.hobbyking.com/hobbyking/store/__5428__AX_2306N_2000kv_brushless_Micro_Motor.html
http://www.hobbyking.com/hobbyking/store/__5430__AX_2308N_1800kv_Brushless_Micro_Motor.html
http://www.hobbyking.com/hobbyking/store/__5427__AX_2306N_1300kv_Brushless_Bell_Motor.html
http://www.hobbyking.com/hobbyking/store/__6784__ZIPPY_Flightmax_800mAh_3S1P_20C.html
http://www.hobbyking.com/hobbyking/store/__6457__Hobbyking_SS_Series_18_20A_ESC.html
These are my choices as they have the beam mounts and will fit with little mods required. OK what do I choose? I want to run an 8" prop for scale reasons and I don't really want a revving noisy fecking thing. The model at present has a 10 amp esc fitted in it's bowels and if possible I would like to leave it there, but if necessary will replace. Prop suggestions? Perhaps running with 2 cell lipos and less rpm. I'm new to this electric and perhaps need a little guidance. I broke the undercarriage today and I am now redesigning for strength which is difficult due to its gangly nature.
John.
210
Hi All,
Love this model, I have cut and chopped this kit to make it more scale and am really enjoying the build. Sorting out the wire rigging(there's an awful lot). Control surface cables are ready for connection as per full size ie on the outside. The aileron control was a wire led along the leading edge of lower wing to a pully to turn 90 degrees to lower aileron horn then both ailerons connected at trailing edges by cable and connection from top aileron horn to leading edge of top wing by spring on top wing aileron. Should work ok I'm using fishing trace coated wire for the control wires and painted fishing line for the rigging. I dont like the nose on this kit as I think it's way off scale and may modify it to suit. The model is getting a bit heavy but I have tried some runs in my living room under power and I think she's gonna fly albeit just like the real thing (barely). Just what I'm looking for.
Love this model, I have cut and chopped this kit to make it more scale and am really enjoying the build. Sorting out the wire rigging(there's an awful lot). Control surface cables are ready for connection as per full size ie on the outside. The aileron control was a wire led along the leading edge of lower wing to a pully to turn 90 degrees to lower aileron horn then both ailerons connected at trailing edges by cable and connection from top aileron horn to leading edge of top wing by spring on top wing aileron. Should work ok I'm using fishing trace coated wire for the control wires and painted fishing line for the rigging. I dont like the nose on this kit as I think it's way off scale and may modify it to suit. The model is getting a bit heavy but I have tried some runs in my living room under power and I think she's gonna fly albeit just like the real thing (barely). Just what I'm looking for.