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Old Jul 30, 2012, 02:13 PM
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Originally Posted by Sundancer View Post
I get a bit more than that in the Witch Sparks with a GWS 6 x 3 I got 5 amps/35 watts, in the Sportster with a 5 x 3 GWS 3.5 amps/25 watts. You should have plenty for the Senator at 6 ounces with that set up Bob.
Thanks George. Your post came up just as I'd posted my reply to Sparks. When I've tested this outfit (tomorrow) I'll let you know what I get.
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Old Jul 30, 2012, 02:48 PM
Sic itur ad Astra
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United Arab Emirates, Abu Dhabi, Abu Dhabi
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Note that SD squeezes a little more with a gws 6x3, so you will have enough I think. Different props and batteries will all affect your wattage readings somewhat.

I use 5x3 gws E props on models with the 1811 that weigh up to 5/6 oz, for 6 and above I find the 6x3 TGS sport work really well and still stay within the range of a 6A esc on a 2s lipo. Always worth putting them on the wattmeter just to see what the static power levels come out like.

The flight levels of load / power usage should generally be a little lower from the static measured value once the prop unloads a little in normal flight. You should be able to tell just by holding the model with a WOT, if its going to have enough wallop, the wattmeter just helps you to avoid overloading your system components

sparks
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Old Jul 30, 2012, 03:38 PM
So I'M meant to be in control?
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Ilkley, West Yorkshire, UK
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Originally Posted by sparks59 View Post
You should be able to tell just by holding the model with a WOT, if its going to have enough wallop, the wattmeter just helps you to avoid overloading your system components
...if you've experience!! Unfortunately, I am more used to a hopped-up EasyStar which is putting out almost 200W..... so the 1811 seems to create a mere zephyr. Good job the Ajax (currently) weighs a bit less than the kilogramme and a bit of the foamie!!!

I will be putting the Wattmeter on the Ajax soon...
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Old Jul 31, 2012, 07:30 AM
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A readout from my watt meter. 6x3 prop. Maximum power on full charge was about 24 watts.
I'll mount the stuff in the model now and see how (if) it goes.
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Old Jul 31, 2012, 08:30 AM
I like real wooden aeroplanes!
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24 watts should equate to 60+ watts per pound if the model is 6 ounces, believe me that will be plenty for a model like the Senator.

How long into the run was that reading? It was just that the voltage looked a little lower than I would have expected.
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Old Jul 31, 2012, 08:35 AM
Sic itur ad Astra
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I'm guessing it was well into the run, unless your battery is less than healthy!
Even so, as George says, there still should be plenty enough oomph to fly the senator at 60w/lb
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Old Jul 31, 2012, 11:24 AM
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Originally Posted by Sundancer View Post
24 watts should equate to 60+ watts per pound if the model is 6 ounces, believe me that will be plenty for a model like the Senator.

How long into the run was that reading? It was just that the voltage looked a little lower than I would have expected.
I didn't time it but I would think around 2 mins. total after several stops and starts. I'll do another run and be a bit more "scientific" about it. Putting finishing touches to the model now but I may chicken out of the logo! The text style I like would be too difficult to do in tissue as it's rather flimsy script. Others would be easier I know but I don't have a "feel" for anything else yet.
Thanks for your replies. I'd never have got this far without the advice and encouragement you lot have given me.
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Old Aug 08, 2012, 12:36 PM
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Nearly there! Noseblock to sort out and decor for wing. As seen here it weighs 5.4 ozs and balances on rear spar.
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Old Aug 08, 2012, 12:39 PM
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Nearly there. Noseblock to sort out and possibly a logo for the wing. 5.4 ozs and balances on rear spar.
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Old Aug 08, 2012, 03:49 PM
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Its looking realy good Bob, cant wait to here how it fly's.
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Old Aug 08, 2012, 04:12 PM
Dog is my co-pilot
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Neatly done, looking good...
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Old Aug 09, 2012, 01:17 AM
I like real wooden aeroplanes!
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Weight and CG sound to be fine Bob, should be a guaranteed flier. I'll put in a request for some calm weather for you!!
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Old Aug 09, 2012, 01:33 AM
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Originally Posted by Sundancer View Post
Weight and CG sound to be fine Bob, should be a guaranteed flier. I'll put in a request for some calm weather for you!!
Thanks George, the weather will be the major factor now I think.
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Old Sep 07, 2012, 01:25 PM
I like real wooden aeroplanes!
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Hi Bob, just bumping your thread back up and wondering if you are any closer to that first flight?
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Old Oct 08, 2012, 12:43 PM
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Well, it's finished at last. Just awaiting a couple of grub screws to secure the motor shaft extension and we'll be ready to fly.
George, sorry to have missed replying to your last entry, I was away from home and failed to see it when I returned. I'll post a little more info. when I've balanced it and can give a final weight.
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