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Old Sep 11, 2006, 07:57 PM
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Quote:
Originally Posted by SCALEFAN
Hey Alex, nice job. However I would still get rid of the plastic.

Al
That's what she said...
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Old Sep 12, 2006, 06:50 AM
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Alex B's Avatar
Balaguer in Lérida - Spain
Joined Jul 2005
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How did you know Carlos ??? I've just known my wife and I are expecting a baby ...it's true !!!

And yes I won't be using those plastic things instead I think I'll work on the balsa and might lay some fiberglass on it...not too sure yet.

Alex
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Old Sep 12, 2006, 09:04 AM
<- Balsa flies better ->
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Gustafs, Sweden
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Quote:
Originally Posted by Alex B
How did you know Carlos ??? I've just known my wife and I are expecting a baby ...it's true !!!

Alex
Oh dear, Congratulations

I must warn you that your available timefor building planes is going to be seriously decreased

Cheers,

Peter
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Old Sep 12, 2006, 09:15 AM
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Thanks Peter...and yes I've already been warned by my older brother and his wife and my own wife

But I'll find the way to have some time to build and fly !!! I hope so

Alex
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Old Sep 12, 2006, 01:53 PM
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Well here's the beast that will swing the prop on this project...I'm going to take it easy before flying it and make sure everything is ok flight after flight...I don't want no more surprises !!!

Alex
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Old Sep 13, 2006, 01:28 PM
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This project has been stopped while I await for Esprit Model parts to complete the motor installation and other bits...will report as soon as I get them and things get closer to the finished product...I think it will take me another 2 weeks to complete it as I want everything to work nice and smooth on this heavy duty beast

Meanwhile I'll start my next project (Kyosho Messerschmitt bf109E) using the electronics I had on the R.I.P. F4U Corsair.

Alex
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Old Sep 13, 2006, 02:01 PM
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Alex,

Good choice on Esprit Models....I was there just yesterday and bought a couple of items.

Hey, did you ever figured out the Wheel Wells for your model? Here's a picture from NitroPlanes for one ZERO RC Model that shows how they installed the Retract Wheel Wells.
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Old Sep 13, 2006, 02:16 PM
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Thanks Carlos I was actually thinking on how to finish the retract wells so they could be taken out in case of need...great idea I'll use small screws on them...and the wheel wells are the easiest way to go...simple and effective.

Thanks for that shot...

Regarding Esprit I've ordered some other things in the past and never had a problem...just that thye're not as fast processing orders.

By the way do you know if Astro Flight it's open ??? I ordered some stuff through their site on the 10th. and have had no news from them

Alex
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Old Sep 13, 2006, 09:42 PM
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Quote:
Originally Posted by Alex B
By the way do you know if Astro Flight it's open ??? I ordered some stuff through their site on the 10th. and have had no news from them

Alex
Open for business? Sure! They are very busy and usually you have to leave a message "or" you can e-mail them at:

info@astroflight.com
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Old Sep 15, 2006, 12:55 PM
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Thanks Carlos I had already sent an e-mail on the 10th and re-sent it today and see if I'm luckier this time

Alex

Just received a reply from Michelle saying order will ship today...yihaaa
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Old Sep 15, 2006, 08:20 PM
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Alex,
The 4130/16 is really a 6S setup (1250 to 1350 watts at 60-65 amps) . I've seen this fly a 10 lb (4.5 kg) plane pretty well, and you should be around 11 lbs (5.0 kg) with a 6S pack. I think you will roast the motor if you go 8S. IMHO, A 4130/20 would be better if you go 8S
Ed

PS ... with the 5320/28 on 10S, you will need an 17" prop to get the amps up to 50 or so ....do you have that much prop clearance ?
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Old Sep 15, 2006, 09:24 PM
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Alex,

To clear up things......which motor are you going to use from post #50 ?

http://www.rcgroups.com/forums/showp...8&postcount=50

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Old Sep 15, 2006, 10:39 PM
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Per Model Motors Web Site:
http://www.modelmotors.cz/index.php?...495%20-%20652g)

No. Of cells max. 32
max. 10s Li-Poly
RPM/V 249 RMP/V
Max. efficiency 92%
Max. efficiency current 10 - 36 A (>85%)
No load current / 10 V 1,4 A <--- Means @ 10 Volts constant!
Current capacity 50 A/60 s
Internal Resistance 57 mohm
Dimensions 63x54 mm
Shaft diameter 8 mm
Weight with cables 495 g
Recomended model weight 4000 - 8000 g
Recomended prop without gearbox 8s Li-Poly 23"x11"APC-E
10s Li-Poly 18"x12"APC-E
Recomended speed controller JETI ADVANCE 77

--------------------------------------------------------------------
Models Parameters:
Wing Span: 1600mm = 63 inches
Wing Area: 50 sq.-m. = 538.2 sq.-in.
Weight: 5300grams = 12.27 lbs.

Based on using some larger and more robust Li-POLYs such as the KOKAM 3200SHD with a maximum 20C discharge rate, they are on the heavy side at 2.83oz. each cell so, they will load down the model but, you get the full advantage of motor performance as these cells will not starve the motor when it comes to AMP draw. I am using 10S2P and the APC "Pattern" 15X12 propeller.

Just take a look at your airspeed.....
Static pitch speed (90mph) is within the range of approximately 2.5 to 3 times the model's stall speed (33mph), which is considered ideal for good performance.

Also, take a look at your static thrust-to-weight!!!! Really, no need for any larger propeller as you need airspeed on this very heavy wing loaded model

Static thrust (176.1oz) to weight (146.2oz) ratio is 1.2:1, which will result in extremely short take-off
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Old Sep 16, 2006, 03:40 AM
<- Balsa flies better ->
wolw's Avatar
Gustafs, Sweden
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Quote:
Originally Posted by guapoman2000
With a wing loading of 39.1 oz/sq.ft, a model of this size will have a very high flying speed, requiring the undivided attention of an expert pilot
Quote:
This model will probable be able to perform a hover or torque roll
Jeezz, you got your self a handfull, Alex

//Peter
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Old Sep 16, 2006, 04:05 AM
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Carlos thanks again...no I won't be using a huge prop on this project unless it's completelly necessary...I mean for scale looks otherwise I'm pretty sure that with the AXI 5320/18 and a 15x10 or 15x12 prop I should get away very well.

Batteries will be 2 packs of Thunder Power at 10-12C rating of 8000mAh capacity and built on 5S4P each.

Motocalc shows about 1000-1200 Watts using this configuration so should be more than enough for this bird I think.

Well I won't be reporting much progress until I get Esprit's motor supports and I figure out how to fix batteries inside and other bits like finish the landing gear wells.

Alex
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