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The Big Ship - first build help

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Geoff Bradley14/05/2009 16:53:57
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I've been trawling through the back issues of RCM&E to find a suitable first build and have decided that The Big Ship in the Jan 2009 issue is just the job. However as a complete newcomer I am finding it very dificult to work out a shopping list for the wood. Does anyone have such a list so that I don't have to keep ordering stuff I have omited.
Also Peter Miller says it has been flown under electric power - can anyone advise me with regard to any variations in construction that may be necessary and the equipment needed to do so.
Any other advice with regard to building this model will be very gratefully received
Tim Mackey14/05/2009 17:33:15
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Have you seen this thread here Geoff?
Tim Mackey14/05/2009 17:54:13
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Right, having dug out the actual mag I can see what the big ship actually is
High wing, slow flying trainer type thingy - which as desigend, flew easily on a 2 stroke  .25 and weighed in at 4lb+.
This will likely be even less with a leccy version....depends on your building skills!
I suggest therefore an outrunner motor of lowish Kv ( 900 - 1200 or so ) to keep the RPM and pitch speed in keeping with its vintage style and a 3s Battery ( assume you will be using LiPo ? ) with a largish prop - maybe 10" or so??
You wont need any more than around 70 - 80Watts per pound as maximum, so look for a motor of  about 300 watts. As for mods, well I dont think you will need to do any TBH - other than lighten up the front end /bulkhead etc, leccy motors dont suffer the vibration, gunge, and fuel proofing required with slimey slimers
This motor ESC combo here should suit...there are plenty around to choose from.
Expect current draw to be about 25 - 30A maximum.
 
A decent battery of say 2000m/a or so should give reasonable flght times -  especially on barmy summers evenings...of which we are due for plenty - I hope

Edited By Timbo - Moderator on 14/05/2009 17:56:34

Geoff Bradley14/05/2009 18:26:56
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Thats brilliant - must phone SLEC tomorrow and the lecy info is just what I wanted to know.
I'm just a little confused about my searching skills on the web site - I did a search for 'the big ship'  but it came up with no results. What did I do wrong ?
Tim Mackey14/05/2009 18:31:30
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Try a little more specifics...such as adding words like model / RCME / Plan  etc.
And of course, use the best search engine - Google.
Peter Miller14/05/2009 18:36:23
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The Big Ship hasn't been flown with electric power, I was talking about the Little Ship.
 
The big Ship should be fine on EP but don't ask ME what power.
 
I used an SC 30 FS. Perfect power.
Geoff Bradley15/05/2009 08:31:48
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I don't want to open a power argument here and I apreciate that tried and tested is best.
However, I already have a ARTF glow model and now want to try a self build and different power source ie.electrickery. If it isn't successful I'l convert  it to an SC 30FS for perfect power !
 
Peter Miller15/05/2009 08:37:19
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No argument, I have a club mate who is building it for electric power. I don't think he has chosen the motor yet.
 
He is a very slow builder so perhaps next year
Geoff Bradley15/05/2009 08:53:37
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He'll probably finish before me but just in case I'll keep you informed of my success - or lack of it.
Tim Mackey15/05/2009 09:22:10
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Please do Geoff, as if that system works out OK for it, I could start a log of "recommended" electric power setups for Peter Miller designs.
That should make me popular with him
Geoff Bradley15/05/2009 09:32:07
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Why not.
Perhaps you could ask the question via this site.  I'm sure their must be lots of people with helpfull information. Go for it
 
Tim Mackey15/05/2009 09:43:23
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I need a "tongue in cheek"  icon
Peter Miller15/05/2009 11:23:57
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I don't mind if people want to power my models with electric power, rubber, CO2 or even steam or water wheels.
 
Just don't ask me to do it
Eric Bray15/05/2009 16:34:50
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You cannot beat gravity!
Peter Miller15/05/2009 18:52:05
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Gravity always wins in the end.
Geoff Bradley02/06/2009 10:50:17
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I've just ordered the CNC kit and am currently studying the front end of the plans to see how the electric motor you advised will fit.
The size of the motor is 35mm long X 36mm dia. however the length of the cowl from the bulkhead is 190mm. Will I have to fit an extra bulkhead or is there some sort of mounting extensions on the market - I couldn't find anything on the Hobbies web site.
Sorry if tere is an obvious answer but this is my first build.
Peter Miller02/06/2009 11:51:01
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I am not really sure about electric motor mounting. I have seen quite a few mounts that look like extension mounts on Ebay. They come straight from Hong Kong I think.
 
The other possiblity would be to build a plywood box onto the front of F-1. I would actually cut a square hole in F-1 and inset the box into it. The bolt the motor onto the end of the box.
 
I would guess that you will need some lead in the nose tog et the balannce right.
 
 
Peter Miller02/06/2009 12:22:50
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I was wriong, the mounts are from this country.
 
 
I have dealt with this company and they are great, fast delivery and great items.
 
Just search for Motor Mount and you will get a selection. Not sure if they will fit yours but they look as if they arew what you are looking for.
Geoff Bradley02/06/2009 12:38:16
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Thats brilliant - thanks very much.
Going back to your idea of a box section - it gave me the idea of filling in the top of the cowl using 1/2" sheet to give a better finished look.
Perhaps a combination will work and git more weight at the front end !
 
Stephen Grigg02/06/2009 16:10:19
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Saw 1 of these fly at the weekend lovely model,and landed perfectly after a dead stick

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