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mmmdowning
08-12-2005, 06:54 PM
:confused:
Its a FUNAERO kit. Want to use a AXI 4130/16 motor. will it be enough to power the ALBATROSS? Speed controller I have is the Jeti 70.

Any help?
Thanks

Model
German Albatros D.III
Type.
Sport Scale
Wing Span
65
Wing Area
1115 Sq. In.
Airfoil
Modified Clark-Y
Wing Construction
Balsa
Overall Length
48 3/4
Fuselage Construction
Balsa/Plywood
Stabilizer Span
17 1/2
Stabilizer Airfoil
Flat Bottom
Stab and Elevator Area
228 Sq.In
Vertical Tail Area
53.2 Sq.In
Engine Size
.91 4C
Landing Gear
Fixed (Spring Type)
Control Functions
4 ( Ail., El., Rud., Throt.)
Fuel Tank Size
10 to 12 oz.
Dry Weight
10 - 11 lbs.
Wing Loading
22.6 Oz Sq. Ft.

ENUT
08-13-2005, 01:19 AM
I've seen the kits.They are nice but not really e-friendly.With that said I would want AT LEAST 80 Watts per pound of power/800 watts at the prop.This is a bi plane with lots of drag.The wing loading is also going to be a factor too.What type of batteries are you going to use?If round NimH cells at least 20 which will give you 24 volts depending on how new they are and what brand. web site says the motor is good for 60amp for 30 sec.Best effeciancy 18to40 amps.If you set the take off amps at 42amp you'll be at1008 watts.Then you will need to throttle back.Another rule to keep in mind,is that the empty air frame should be HALF of the Ready to fly weight.Motor, battery ,servos ,controler,receiver making up the other half.I try to live by this rule.Good luck,

ENUT

mmmdowning
08-13-2005, 04:35 PM
Thank you, I will be using lipo's for this bird. I'm starting to feel comfortable with them.

ENUT
08-13-2005, 05:33 PM
Well as long as your wallet is comfortable too:D :D Good luck,

ENUT

luc
08-14-2005, 10:57 AM
I use the 4130/16 on various H9 warbirds (8lbs), in 6S. I think 10lbs should be ok, but the max for this motor.
Try keep it light....

aerospike
08-14-2005, 03:40 PM
You're gonna want to lighten up the airfame some by punching lightening holes in the ribs, fin and stab. Also, reduce the thickness on some of the ply parts, particularly in the nose. His kits are laser cut and he could easily go into his CAD files make similar changes to create an electric version of the kit.

mmmdowning
08-14-2005, 04:10 PM
Thank you guy's. I figured I may have to make lightening holes. I'll lighten every piece I can find without messing the structure up.

On the motor its a AXI 4130/20 not the 16. My mistake. I can't wait to start on this plane.

IUC
You have some very nice birds. Even sweeter being electric.

luc
08-14-2005, 04:17 PM
Thx..

on the 4130/20, you may certainly add 1S or 2S, to 7 or 8S, and a bigger prop (around 17*10), that will help

Gordon
08-30-2005, 11:22 PM
Hi

This Tiger Moth is 70" span, weighs 8.75lb with an AXI 4130/20 turning a 16x10 APC-E on 6s4p 6200mAh lipos and drawing 33A. Wing area is 1376sq in and loadings are 14.6oz/sq ft and 80W/lb. It has quite a lively aerobatic performance, roughly what you'd expect from a WW1 scout, and is a nice slow flier too. Wing section is thinned Clark-Y.

The wing loading quoted for your kit is more akin to that of a hot aerobatic bipe like the Pitts, and I'd go for more pitch rather than diameter on the prop, as I think your model will need a faster airspeed than mine for good handling. Lighten it as much as you can :)

Gordon

mmmdowning
09-09-2005, 11:18 AM
Gordon
Can you show your battery setup? What packs did you use?

Thanks

Gordon
09-09-2005, 02:00 PM
Hi mmm

The attached pics show the battery chute in the built-up structure, and the way the batts go in. The cowl top is held by dress snaps and a couple of small magnets. The batteries have velcro underneath at the front, to hold them against slipping back in the chute, and a velcro strap over the top at the front.

The model began life 3 or 4 years ago on round cells, but I now use Schuebeler lipos. I had to widen the chute a tad for the wider lipos. My packs are a bit longer, wider and heavier than a pack would be if made from a couple of TP 6000 3s3p Prolites laid side-by-side.

Gordon

Gordon
09-09-2005, 02:04 PM
The model also began life with a geared Maxcim seen in the above old pic. I fitted the AXI to get rid of gearbox noise.

Then I had to fit home-made rubber mounts to get rid of the AXI whining noise, but the model is quiet now.

Gordon

mmmdowning
09-09-2005, 03:22 PM
Gordon Thank you. It looks like a fun plane. I'm going to look for the rubber bushings and Lowes or HomeDepot. I haven't thought about doing that.

mmmdowning
11-28-2005, 01:54 AM
Guys should I go with the AXI 5320 series? with the wieght and type of plane?

ENUT
11-28-2005, 12:15 PM
mmmdowning,Here's the AXI web site.It list the motor's spec's.As for motor,alot depends on how you plan to fly the plane. www.modelmotors.cz (http://www.modelmotors.cz)

ENUT

Dereck
11-28-2005, 02:26 PM
The model also began life with a geared Maxcim seen in the above old pic. I fitted the AXI to get rid of gearbox noise.

Then I had to fit home-made rubber mounts to get rid of the AXI whining noise, but the model is quiet now.

Gordon
Hi Gordon
What comes next - an in-flight recording system of a real piston engine, or a big rubber band driven by a S400 and slapping around inside the fuselage to make it sound like a gummyband indoor ship? :)

Good to see you over here at last ;)

Regards

Dereck

PS - for mmmdowning. Get hold of a copy of Gordon's big electric Tiger Moth plan. Change everything on that Albatross structure to match it. No point in re-inventing the wheel...

D