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» 2019 Llanfair TH Village Fete
National Grid Electric Flight Empty2019-07-12, 18:53 by Rich

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National Grid Electric Flight Empty2019-03-03, 23:44 by Charles E Cornes

Saturday 7/7/18

2018-07-07, 21:07 by Gary M Jones

I was at the field today between 14:00 & 15:00 all on my own , good flying too. There is a dead sheep along the fence line towards the gate from the pits, I saw the farmer so reported this to her. I hope no one had plans for a BBQ Smile .

Farmer …

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National Grid Electric Flight

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National Grid Electric Flight Empty National Grid Electric Flight

Post by Guest on 2010-08-31, 10:19

Just seen the HobbyKing update on this power unit for electric flight/fright HERE
I believe there is an optional extra available of a small nuclear power station affraid

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National Grid Electric Flight Empty Re: National Grid Electric Flight

Post by Guest on 2010-08-31, 15:43

Back of fag packet calcs:
spec says 70v; lets say 74v = 20 cells
100cc TO 120cc power 10bhp - 12bhp = roughly equates to 7.5kW - 9kW
Current to get this power 100A - 120A
So, 5000mAh cells @25c discharge. But, lets give them an easier time and thus a longer life and have a 20s2p pack working at 10c - 15c; thats 40 cells!
A pack of 5C Charge Loong Max Tipple 5000mah 5S 25C Lipo Battery from GiantCod costs £66.30. 8 of these required at a total cost of £530.40 and at a weight of more than 5kg. Could probably reduce the upfront cost and weight with higher spec cells but at the expense of whole life cost.
The charging should be a sight to see as well!
Just because you can doesn't mean you should. Unless I've got it all wrong. scratch

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National Grid Electric Flight Empty Re: National Grid Electric Flight

Post by Guest on 2010-08-31, 15:47

Oh, another point I forgot. Over 50v DC there are issues surrounding safety legislation.

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National Grid Electric Flight Empty Re: National Grid Electric Flight

Post by Mark Barnes on 2010-08-31, 18:54

Allan,

You can soon raise those saftey issues as ive hopfully got a sample one on the way from another supplier to test Twisted Evil

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National Grid Electric Flight Empty Re: National Grid Electric Flight

Post by Guest on 2010-08-31, 19:44

WOAW!!!!!!!!!
Wooo hooo!!!
Should give andy's turnbine a run for its money!!!

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National Grid Electric Flight Empty Re: National Grid Electric Flight

Post by Guest on 2010-08-31, 20:28

'EU low voltage directive' applies on equipment over 50vdc and 30vac. On a personal safety point at 70'ish vdc touching bare wires with damp/wet hands(as might occur on a flying field) can result in muscle spasam/cramp. This locks the muscles and you are unable to let go. If lucky the results are just burnt fingers. If your skin is more conductive then more current flows and its the amount of current that kills. Then there's the three phase AC thats generated by the speed controller. Not a massive panick but something to be aware of as this is starting to enter the area of concern especially in a potentialy damp/wet environment. What I'm saying is don't go round touching bare conductors as if it was a 3cell - 6cell electric jobby.

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National Grid Electric Flight Empty Re: National Grid Electric Flight

Post by Rich on 2010-08-31, 21:03

can't really see any benefit at 5kg, an engine setup doesn't weigh that much & you can only set yourself on fire not electrocute yourself

I know you can buy the gear but it's all fantasy, no reallity

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National Grid Electric Flight Empty Re: National Grid Electric Flight

Post by Guest on 2010-08-31, 21:11

Plus another 2.5kg for the motor and a bit for the controller. As I said ''Just because you can doesn't mean you should''. Fantasy Island Productions. Rolling Eyes

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National Grid Electric Flight Empty Re: National Grid Electric Flight

Post by Rich on 2010-08-31, 21:15

IT'S CHEQUE BOOK MODELLING AT IT'S BEST

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National Grid Electric Flight Empty Re: National Grid Electric Flight

Post by Guest on 2010-08-31, 21:22

HAHAHA!! I'll say, bet it would be £1000+ for the (bloody heavy) power package affraid

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National Grid Electric Flight Empty Re: National Grid Electric Flight

Post by Mark Barnes on 2010-08-31, 21:28

ha ha ha, belive me ive no intesion of keeping a 20s setup its just for testing although it may never arive as there is lots often spoke about (although i did have my hands on the 80cc equivilent one this weekend

But in fairness 100cc/9KW is small time, 150cc/14KW is were its at

test run
https://www.youtube.com/watch?v=r5Vgyz_74pQ

and the maiden from a moth or so ago

https://www.youtube.com/watch?v=Y7I39PUeI5g

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National Grid Electric Flight Empty Re: National Grid Electric Flight

Post by Rich on 2010-08-31, 21:58

looks a pretty smart setup, a lot smaller package than I anticipated, did you see the size of the speed controller & motor wiring or should I say cableing

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National Grid Electric Flight Empty Re: National Grid Electric Flight

Post by Andy Sayle on 2010-08-31, 22:41

I'll happily test it for you... It would be brilliant in a little monkey bike Wink

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National Grid Electric Flight Empty Re: National Grid Electric Flight

Post by Guest on 2010-08-31, 23:06

The original 850cc mini developed 39bhp at the crankshaft but only delivered 19bhp at the road wheels( transmission losses). The above set up is 18.5bhp. You could put it in a small car. You would of course require a lot of spare battery packs to go anywhere! Rolling Eyes

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National Grid Electric Flight Empty Re: National Grid Electric Flight

Post by Mark Barnes on 2010-09-01, 08:41

Ok so as Alan rightly says your looking at about £1000 for the electric set up, I would argue its cheeper than Petrol!!

1x DA100 - £1058
http://alshobbies.com/shop/cat.php?id=699
or even a DLE 111 - £599
http://alshobbies.com/shop/cat.php?id=817

Add 2 cans and headers - £100 each

Switch and Batiery - Another £10 or so

others like fuel dots and tygon tube - another £20-30

Then £5 ish every flying sesion for fuel

Electric dosnt look to bad dose it?

M

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National Grid Electric Flight Empty Re: National Grid Electric Flight

Post by Brian Colclough on 2010-09-01, 08:50

Not till you factor in the charger power supply/s generator or field battery big enough for an 18 legger truck and you still have a model with a higher wing loading. Not a problem for us CBM's but then again I'm a confirmed petrol head Wink

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National Grid Electric Flight Empty Re: National Grid Electric Flight

Post by Brian Colclough on 2010-09-01, 08:59

P.S. You also end up with a model that like it's petrol counterpart is good at removing body parts but is also capable of electrocuting you or not quite severe leaving you paralytically attached to it's motor or associated wiring National Grid Electric Flight Shoots10

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National Grid Electric Flight Empty Re: National Grid Electric Flight

Post by Guest on 2010-09-01, 09:14

Petrol FTW!

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National Grid Electric Flight Empty Re: National Grid Electric Flight

Post by Rich on 2010-09-01, 10:00

Mark Barnes wrote:Ok so as Alan rightly says your looking at about £1000 for the electric set up, I would argue its cheeper than Petrol!!

1x DA100 - £1058
http://alshobbies.com/shop/cat.php?id=699
or even a DLE 111 - £599
http://alshobbies.com/shop/cat.php?id=817

Add 2 cans and headers - £100 each

Switch and Batiery - Another £10 or so

others like fuel dots and tygon tube - another £20-30

Then £5 ish every flying sesion for fuel

Electric dosnt look to bad dose it?

M

Plettenberg 37/6 $1249.00 http://www.icare-rc.com/catalog/predator-p-1919.html?cPath=49_50

Schulze 300A ESC $879 http://www.icare-rc.com/catalog/futxxl40300wk-p-2446.html?cPath=24_25

Battery Flightpower PRO50-36005S 6C 50C 100C $131.58 € 107.04 X 6 = $789.48 http://www.flightpower.co.uk/products.html

Battery Flightpower PRO50-36004S 6C 50C 100C $105.26 € 85.63 x 3 = $315.78 http://www.flightpower.co.uk/products.html

Charger Schulze next-14-350 $605.00 http://www.schulze-elektronik-gmbh.de/next2010-e.htm

That's $3838.26 converted to sterling =£2558.84

That little lot will give you three flights before charging, if used for IMAC that would mean one maybe two rounds of known

I can't really see how that's cheaper, even if it is top end stuff.



I'm bored


Last edited by Rich on 2010-09-01, 11:17; edited 1 time in total

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National Grid Electric Flight Empty Re: National Grid Electric Flight

Post by Mark Barnes on 2010-09-01, 11:05

Not as bored as i am,

That Pletenberg gear is the nuts mind! what price is a DA120 then?

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National Grid Electric Flight Empty Re: National Grid Electric Flight

Post by Rich on 2010-09-01, 11:26

$1200 that's £1200 as no discount even if you buy it in the States

MTW or K&S cans or pipes & headers £300 & you could thoeretically fly as long as you want for a max £10 a day & no silly chargers or power plants to drive the charger

you would need 6 14S packs to have a good session the prices I postedf are for three 14s packs

I'm sure you could setup cheaper but whats the point even if you can, why would you, if you put a DLE or similar then the price would fall dramatically, set of cans for less than a £100 with headers

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National Grid Electric Flight Empty Re: National Grid Electric Flight

Post by Mark Barnes on 2010-09-01, 11:35

so comparing a Pletty (price above is for a 14kw/150cc set up) with a DA120 is kinda like for like IMO

So a DLE and the Hobby City motor again on a par, your not going to jump into big electric if you dont already have good chargers and stuff so that price is negligable.

Not saying i agree with it, 10s in 'Cath dose my head in just merly saying the prices are not as expensive as they first seem. I mean comon who has time for 6 whloe flights Shocked

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National Grid Electric Flight Empty Re: National Grid Electric Flight

Post by Mark Barnes on 2010-09-01, 11:40

Mark Barnes wrote: I mean comon who has time for 6 whloe flights Shocked

As are resent Poll showed the club average is 3-4 tongue

https://rdmfc.forumotion.co.uk/general-discussion-f1/on-average-how-many-flights-per-field-visit-t1546.htm

So one of these http://robotbirds.com/catalog/product_info.php?cPath=9_161&products_id=4884 and a couple of chargers with a few spare hours in the evening, jobs a good un

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National Grid Electric Flight Empty Re: National Grid Electric Flight

Post by Guest on 2010-09-01, 11:52

3 or 4 may not sound alot but if the flights are lasting 10-12 mins then thats quite a bit of flight time

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National Grid Electric Flight Empty Re: National Grid Electric Flight

Post by Brian Colclough on 2010-09-01, 11:59

Mark Barnes wrote:
Mark Barnes wrote: I mean comon who has time for 6 whloe flights Shocked

As are resent Poll showed the club average is 3-4 tongue

https://rdmfc.forumotion.co.uk/general-discussion-f1/on-average-how-many-flights-per-field-visit-t1546.htm

So one of these http://robotbirds.com/catalog/product_info.php?cPath=9_161&products_id=4884 and a couple of chargers with a few spare hours in the evening, jobs a good un
Bloody hell Richie was that busy flying yesterday he had to have refreshments taken out to him at the strip the waiter had to use the club electric trike clown

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