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Proper Job's blog
Posted by Proper Job | Jan 05, 2014 @ 05:53 AM | 1,093 Views
Another episode in the "Learning Curve".

I've now finished my Aquarius and am very pleased with it. I decided to scale it down to 75% of Leadfeathers original design, 'cos I want to fly it indoors as well.

The AUW is 340grams (about 12 Oz), including a 1,000mah 2S battery. The CoG should be 75% of 91/4", so its 7" right at the rear of the sponsons.
The motor I used was a AX-1806N-2100kv, 7.2A Thrust =337gr. I used an 8040 for test flight. Test results by users on the HK site show around 350-365Grams thrust on 8040 and 8x3.8, which should give a 1:1 ratio.

But, I could not get it airborne, seems to have plenty of forward momentum but would not lift at all. The prop was rotating clockwise and Yes, the numbers on the prop were facing the front. It zoomed around on the floor of the gym in ever decreasing circles OK.
So it could be the thrust angle is not right. Secondly the motor maybe a bit underpowered, although its got similar specs to the blue wonders. So, I posted a question on the thread to ask Lead for his advice.

Lead said, "Try hand launching outdoors, and maybe increase the height of the floats. This I did and tried ROG again, but it did still not like to get airborne. So then I tried hand launching as Lead said and it certainly flew but not very good, which led to a bit of a doink and broke the prop. I had previously thought about my theory of it being a bit underpowered. So I made sure I took some alternative gear with me. So...Continue Reading
Posted by Proper Job | Nov 14, 2013 @ 05:18 AM | 1,449 Views
I've been looking for another project that would fit the following criteria:

1. Easy to build

2. Ok for indoor (Gymnasium)

3. Fits in to the LARF type of model category

4. May help me to improve my flying

So, after a lot of browsing I happened on the Aquarius, but wondered why the thread is now 'dead', with such a good looking plane. The Capricorn seems to be still popular.

Having started the build, I have come across a small problem that when the elevons are moved, the trailing edge corners touch the adjacent elevon whether moving up or down.
I am building it scaled down to 75%. so that the length of the elevons are 3.8".

The elevons touch each other when up and when down, so might have to ask the Designer Leadfeather for some help.

I don't know how to attach pics(jpg) to a PM, so i will post them here and ask "Lead" to visit this page to asses my problem.
Posted by Proper Job | Oct 19, 2013 @ 07:16 AM | 1,816 Views
My take on the EzFly
As it is very well documented on RCGroups and elsewhere on the WWW, the EzFly is a fantastic beginners plane, great design Mike.
I've been learning from Mike's inputs and all you other EzFliers, so I thought it time to post some of my progress on my take of the EzFly.

Having looked at the the plans and attachments in the thread numerous times, I just kept thinking that the Vert Stab / Rudder profile was very much like an A-6 Intruder.

So I thought, why not make the nose shape of mine like the A-6 also, so I've called mine the EzA-6Fly.

Not having access to some of the great materials you guys in the States and elsewhere have, My model is made from a mixture of Foam-board and Styrene foam.

The Foam-board I use here in Oz is definitely Not DTF, ($Tree) 'cos mine costs about 7 times more than $Tree DTF !!!! (it's still relatively cheap tho).

I used 5mm Foam-board (paper off) for the wing, Horiz.Stab + Elevator, horizontal connecting part and the actual rudder.
I managed to find some 10mm Foam-board, which turned out to be fantastic for the fuse, very stiff. Getting the paper off this, was a real PITA though!

As you will see from the photos, I used the Styrene foam for the Kfm step on the upper wing, as using the 10mm Foam-board would have added too much weight.

I also used the Styrene foam for the front fuse doublers.

I have finished the EzA-6Fly and maiden-ed it. A few half circles, with a coupla good landings. This thing just about flies itself...Continue Reading
Posted by Proper Job | Aug 22, 2013 @ 04:59 AM | 2,071 Views
A while ago, I tested this motor I bought from Hobby king and it seemed to perform quite different from the makers specs.

After posting a discussion on a power systems thread: http://www.rcgroups.com/forums/showthread.php?t=1904313, I got a lot of help from some really knowledgeable guys who gave me lots of information including Dr Kiwi (a respected Motor expert). To do more accurate tests for the discussion I made a "Thrust Tester", and when used in conjunction with my Turnigy "7-in-1" meter and a set of accurate kitchen scales, allowed me to do more testing particularly for motors that i will use in future models that are on the "to-do-list".
After my initial basic tests, Bruce Abbott responded:
What current draw do you get with the 6x4 on 2S?

My reply was:

"On 2S with a 6x4E at 7.5V pulled 6.2Amps, 48Watts,
plus also measured rpm(opto) at 10860 giving 230grams thrust (measured on a newly constructed Thrust stand)"

Seeing as the Recommended prop was a 5x3, I thought I might do some more tests, however, the nearest 2 props to a 5x3 Iíve got are :

On 3S with a 5x5E at 10.6V pulled 7.16Amps, 92.3Watts, 260gr thrust at 14160Rpm
and also on 3S with a MA5540 at 10.5V pulled 7.68Amps, 80Watts

Then tested on 2S with a 5x5E at 7.4V pulled 4.63Amps, 30.6Watts
and also on 2S with a MA5540 at 7.4V pulled 4.32Amps, 29Watts


So I thought I'd post pics of my Motor Thrust Testing Set-up.

My Turnigy "7-in-1" meter is a really good unit. I am able to measure RPM (opto) as well as all of those 'Electric Thingies'. Its also fantastic when used as a Lipo Tester, showing each cells charge status and "% Out-of-Balance".

BTW, the image on the screen of the "7-in-1", was not related to testing of the AX-1806N 2100Kv motor.

Geoff
Posted by Proper Job | Mar 20, 2013 @ 06:47 AM | 2,147 Views
READERS WILL HAVE TO SCROLL DOWN TO THE BEGINNING OF 'THE SAGA', where My AXN Mods and Maiden post is down below->

I've had a few sessions with the AXN, but finger trouble again ended with a few fairly heavy donks, which broke the wing saddle off.
After a while I repaired it and flew it, but on a very heavy nose and wing prang, I heard the sharp Cerack! So I thought Oh-Oh, sounds like the wing spar has just broken. Sure enough it had. Any way it was in for some major surgery and in looking for a replacement spar I used a 9mm garden cane which only needed one knuckle filing down to fit for a very temporary repair. BTW this was 10 grams lighter than the Stock fibreglass one! After these repairs I had another session and guess what Ė another heavy prang where the already repaired wing saddle broke off again! [See Pics]

After my repair job where the wing saddle had "detached" again, I was not confident about just using CA , as I did the first time. So I used my Sika PU, and was able to clamp the rear of the saddle and then also insert two kebab skewers from the cockpit rearwards and cut them off after inserting about 50mm.
Whilst doing the saddle repair, I noticed that the fuse tail boom just behind the motor pod was showing a possible future breakage point, so I heated up a metal rod and sort of drilled it in and made two holes from about 75mm behind the dodgy area forwards into the fuse, towards the cockpit. I then cut two pieces of 5mm carbon tube...Continue Reading
Posted by Proper Job | Jan 18, 2013 @ 03:01 AM | 2,386 Views
READERS WILL HAVE TO SCROLL DOWN TO THE BEGINNING OF THE 'SAGA', where My AXN Mods and Maiden post is below->



I've now managed to maiden my AXN, not without its problems though..... Not only was it the maiden for the AXN, it was my first ever RC Flight !
My flying field is literally a field (as in a big paddock on my daughters farm [at the moment wheat stubble] (so no one could see me).
First made a couple of not so good launches, then found I didnít have to worry too much (as long as I threw it slightly above horizontal) but it kept banking to the left and donk. So had to take it back to vehicle to do some running repairs (mainly on the nose)
I tried sorting out the banking, so my noob solution was to put on some aileron trim 'cos the ailerons were not sitting level with the TE .
Anyway, after a couple more launches it (and me) seemed to perform better.

Eventually, got it to a decent climbout and did a sort of circle then lost orientation and donk (cartwheel donk) The wings were only held in by the 19mm white tape(as Firepower suggested), but did suffer a bit, in the cartwheel)
Back to vehicle to do a some more running repairs and then managed a full circle and half decent landing, then an OK launch and another cartwheel donk which reshaped the AXN into an X plane [see pic]

I think I will have to glue in some hooks to hold the wings by rubber bands, and fix the spar covers better.
Its got a bit misshapen around the cockpit area - I've attached a...Continue Reading
Posted by Proper Job | Jan 18, 2013 @ 02:41 AM | 2,384 Views
My AXN Mods and Maiden Flight
Having read a few of the many of pages in the AXN thread, I thought I ought to do a few of the mods some people have carried out before I fly mine.
It didínít take too long to put the AXN together for flight. Although, I was quite surprised at the extra length of the Rudder and Elevator pushrods, which if not cut off, could cause some potential damage to the battery, but a number of tips in the fantastic thread informed me what to do. The first mod. I did was to the battery compartment cutting about 3mm of each side where the Lipo is to fit. Then, using a piece of plastic moulding (shaped like a "T" beam) that is used to join panelling inside older style caravan walls. I dremmeled some slots to take medium length velcro straps and then used the equivalent of Gorilla Glue to stick this to the floor of the cockpit where Iíd previously taken out a bit of foam from the formers. Another mod., was to insert a thin carbon rod to strengthen the Elevator, glued in mainly with CA but with a dab of GG equivalent at the ends, see pic. The third mod. I did was, to buy a plastic nose spinner, cut the inside away and glue it on the nose of the CF (Ďcos I knew I would be having a few dings). I also drilled holes in the canopy for better airflow to the ESC.

Quote:
I will maiden the AXN shortly and keep updating the "saga".

MORE TEXT and photos here
Posted by Proper Job | Jan 06, 2013 @ 01:04 AM | 3,405 Views
For some strange reason when I started to think of getting into model planes, I seemed to gravitate to building, as I liked the challenge of constructing, fixing, glueing etc. I used to make furniture and things out of re-cycled timber, so have always been handy with tools, saws, machinery etc and all of the required accuracy using the rulers, squares and calipers which make life easier. Measure twice - cut once.

So I thought I would start with a balsa kit and somehow chose a Guillows B-24 Liberator. I've always liked the B-24 over the B-17 as it did a lot of its good work "in the shadows of the B-17", and its a 'cool' looking plane.

After I got started, I visited a couple of local RC Model Flying clubs and talked to the guys and they couldn't believe that I was actually going to build something which (A) wasn't designed to fly [mine was a Guillows showroom model] and (B) and wasnt an ARF or RTF so as to start flying straight away.

I thought I would eventually build a Trainer to learn to fly on.

Then later on when browsing the net and found RCG, I came up on a B-24 Build log by Smokin' Beaver , where he takes non-flying Guillows models and builds them to be able to fly (light weight that is). So I am now going to follow Phils B-24 build, no point in re-inventing the wheel is there?
Phil has been so helpful, answering heaps of my Noob questions. So I will post a few pics of some progress of my build. The Guillows B-24 kit has some reasonable balsa in it although as I 've progressed, I've noticed a varying quality in some of the parts. Its very easy to split the fuse formers where the notches are.
I will update and add more when I've made some more progress.

However, I have to learn to Fly!
So I intend to do some research, then I'll buy something to learn on maybe a Little Stick or a 'Pusher' type, ARF probably.
More Later
Posted by Proper Job | Oct 22, 2012 @ 07:16 AM | 2,456 Views
Thought I'd post some shots of my first "Try and Fly". With me being a newbie, it just had to be in the 'keep-it-simple-stupid' (KISS) category.

I chose a really basic model (Cuckoo EDF) which is similar to the Mini_Ultra Stick.
The instructions say Suggested weight is 120grams, but having fitted everything I've come out at 150grams.
The EDF(9gr) seems quite powerful, so I hope its got enough 'get-up-an-go' to get airborne OK.
I've used the recommended Orange 410Rx(2gr), one 800 or 1000mah lipo (45-48gr). Also using recommended HK 251 and 282 servos(3 x 2.7gr).

As you can see from the photos, there's not a lota room to fit all components.
Will maiden shortly.
Posted by Proper Job | Oct 22, 2012 @ 06:43 AM | 2,395 Views
Just thought I'd put a coupla pics of my Charger setup. First time I used it today to Parallel Charge 2 x 800mah plus 1 x 1000mah lipos. Everything worked as published and was done on Balance Slow and was finished in 40 minutes.