old4570's blog View Details
Posted by old4570 | Yesterday @ 06:38 PM | 2,339 Views
Micro Tundra Loops and Lands (4 min 49 sec)



Yeah , thats about it !
Remember that engine test ? And how on the test stand that little motor put out 160grams + of thrust !
I dont think that translates to what is happening in the Micro Tundra .

Is it the battery ESC combo ? Delivering less power VIA the 1106 ... Yeah , in the model , it's a different story .
If you want to throw the MT around ( Stunt ) , then you will want more POWER !

I did try to do rolls , just not enough aileron ( 50 / 50 - Rates / Expo ) , so I will need to tweak that .
I have ordered a 1306 3200kv - So will see ? Also might want a new ESC , maybe 10A ? can you buy a 8A ESC ?
Anyways , ..........
Posted by old4570 | Oct 28, 2020 @ 04:49 PM | 5,475 Views
Micro Tundra Low and Slow (5 min 57 sec)


Still wasting time on the elevator
Once the elevator is set in stone , I can play with my rates and then throw the Micro Tundra around a little .

Oh yeah , I did a nice landing this morning .

Just stayed on the power till I was almost on the ground and then when a few inches off the ground I cut power and the MT settled almost perfectly .
Posted by old4570 | Oct 27, 2020 @ 05:02 PM | 6,993 Views
XK A160 J3 Low and Slow (5 min 16 sec)


Flying the J3 as slow as I dare ..
After the flight the battery still had 75% , so you know it was a low throttle flight .

I trimmed the LE Slats at the wing tips .. I am not sure , but they may have been affecting the Ailerons ( Making it harder to bank / turn )
J3 feels much better after the Slats being trimmed .

It flies slow .. Where was the death spiral ? I even stalled it , and you can hardly tell the J3 stalled .
I put the blame on the flight control board , because without it . ( There is no death spiral and stalls are so gentle they are hard to notice )
Posted by old4570 | Oct 22, 2020 @ 04:16 PM | 715 Views
Prime jet pro EDF (3 min 24 sec)



Wow Another Vintage project ! Left in the dust by DLG !

This was my EDF'ed Prime Jet Pro , and I think this is where my 50mm EDF resides .
Seriously , so much conflicting information on CG for this plane . I started with 20mm forward of the wing spar .
And the PJP was seriously / I mean / seriously nose heavy . I needed a lot of up elevator to maintain level flight , and to land I needed all the up elevator I had available ( 50/50 on rates expo ) . I changed my elevator rates from 50% to 60% for more elevator authority because of the CG .

After moving the battery back a little it flew much better , but was still very nose heavy . ( 15mm from Spar )
Im going to need more Velcro !

2s barely does the job , throttle range was around 70% to 100% , fixing the CG might help with that ? But I do posses a 3s battery that can boost the available power .
Speaking off ! The battery was a little 800mAh 2s , which might give me 2 minutes of flight / maybe 3 if I can fly @ lower throttle .
Yeah ........ That 3s might be a better option .
It was an experiment , that was started way back in time . How long has this gathered dust ? ( Years )
Oh well , it has been maiden'ed and it does fly ( Not a crash monster )
Posted by old4570 | Oct 21, 2020 @ 05:37 PM | 3,238 Views
EDF Wing ( No power ) (0 min 44 sec)


This started a long time ago .. 30mm EDF Wing ..
The first 30mm EDF was impressive , enough so to start this project .
Unfortunately the day before the maiden , the motor died .

I could not find a motor for it so replaced the entire unit .. 2nd one was not as powerful as the first .
+ At the time I went DLG , so the project came to a halt ..
Until this morning .
A week or so ago I spotted the wing and remembered , oh yeah - I never played with that !
So now I know , that 30mm just dont cut it .

Oh dear ! Another project to work on . I think I have a smooth running 50mm EDF doing nothing .. So might shoe horn it in there .
Or maybe a 40mm ?
Hmmmmm .................... ( ? )

Update :
50mm is a 55mm EDF , runs smooth .. ( It's a nice EDF ) but way large for this wing !
BG has a alloy EDF ( 40mm ) , so ordered that ! How long to get it ? Way things are , maybe early 2021 ?
Posted by old4570 | Oct 20, 2020 @ 04:35 PM | 4,572 Views
HobbyKing Micro Tundra ( Take 2 ) (6 min 11 sec)



Take two ! ( Or crash 4 )

Yes , I could have just edited that out ! But where is the fun in that ( For you ) .

On the roll thing , I had 8 points of offset before , for this morning I halved that to 4 points to the left ( To counter that roll to the right )
Anyways , first launch ! - My fingers got hung up on something , probably the horizontal stabiliser . Resulting in crash 4 in the Micro Tundra illustrious flying history . ( Sure am racking up those crashes hu ? ) Does that prove how sturdy the MT is or how soft and mushy the ground I fly over is ?

Never mind .. The MT needed a lot of down trim to level it out , almost all of what the trim pot had to offer . I might have to manually level that out ( Elevator )
The flaps are effective , but because of the elevator trim situation the MT became very floaty with the flaps and doing a nice low flyby was hard as it just wanted to climb , ( I will have to sort that elevator )

My CG was pretty much on the money ( 26mm from LE ) with the Zippy 350 2s and 5ch Micro Rx ..
After 5 minutes of use the zippy was reporting 30% when I got home . And that was flying with relatively low throttle averaging 50% or less .

Flying weight = 156.2 grams
At this weight the Tundra did fly slow , especially with flaps .
The model was very stable and tracked well .
I think once properly trimmed and set up , the Micro Tundra will be a...Continue Reading
Posted by old4570 | Oct 19, 2020 @ 04:11 PM | 5,602 Views
XK A160 without the flight control board (6 min 38 sec)



The Chicken = Airframe
The Egg = Flight control board

What the heck is going on ?

It's a completely different animal ! So I would say , that for me , the flight control board was crashing the XK A160 .
Because without the flight control board , this plane is NUTS stable . Almost like a train on tracks stable .
And the faster you fly the more stable it becomes . ( That might be the leading edge slats ) . There was no nasty stall tendency at all , not even when I stalled it .
That's crazy Where was the instability ( Yeah - in the flight control board )

Seriously XK can bite my shinny metal bee hive ! ( They sold me a turkey instead of a J3 cub )
XK owes me $$ ....
Posted by old4570 | Oct 18, 2020 @ 10:39 PM | 5,450 Views
XK A160 update (1 min 8 sec)


New Rx fitted as well 2 new micro servos ...

So will it still be a crash monster ?

The Chicken or the Egg ? ( is the problem the flight control board or the plane itself ? )

I mean , J3's usually fly well , don't they ?
Posted by old4570 | Oct 18, 2020 @ 05:09 PM | 5,470 Views
Yes , crashed and crashed and crashed some more !

Crash Post Mortem !

A) Going with the 6030 Gemfan looks to have been a mistake and caused more problems than I thought I was fixing ! The MT ( Micro Tundra ) rolled to the right like a terrafirma loving brick . ?????? What the heck ? If we think about it logically . The GF6030 has way less torque effect than a 6x4 . Its a lighter prop with less pitch . If I had gone with the 6x4 ? It might have not rolled to the right because of the extra torque it has over the 6030 .
But that was a lot of roll to the right ?

B) Aileron : Really sensitive on the ailerons , I had around +-10mm with 50% expo ( 60% rates / 50% expo ) , I rolled those back to 40% rates and 50% expo and it was much better .

A did some add some left aileron offset to counter the roll to the right , and it launched really well . But by now the prop was damaged and after a few seconds of behaving well the bent prop blew off resulting in the 3rd and final crash of the morning .

RIP : Gemfan 6030 .. The Micro Tundra is ok !
Just lamenting the loss of a well balanced prop !

40% Rates / 50% Expo on the ailerons
60% Rates / 50% Expo on the elevator
50% Rates / 50% Expo on the rudder
Battery = Zippy 350 2s
CG was pretty much as per instructions ( 26mm from LE )

So this morning was a bust / or crash ! Wow! , so hopefully next time it will be with a grey KK6040P and I have to watch out for torque roll !

Micro Tundra Crash Maiden (2 min 31 sec)

Posted by old4570 | Oct 18, 2020 @ 12:12 AM | 4,182 Views
Yes triple really hate doing something stupid !

I meant to do this right away , but for some reason forgot all about it and jumped to conclusions because I did not double check my perception ! ( Direct Comparison ) Cos I did have a 1106 in a box of motors .

For the record , old4570 was stupid !
old4570 hates being stupid !
And old4570 apologises for being stupid !

Motor in the micro Tundra is a 1106 ..
old4570 must learn to fact check , and more importantly remember to check and check again !
( Measure twice cut once )
Posted by old4570 | Oct 17, 2020 @ 02:31 AM | 2,106 Views
132.8 grams - assembled less battery .
Thats with the 5ch Micro Rx . and the Gemfan 6030 prop ...

So tweaking of control surfaces will be needed ( mine is not perfect ) + range checking it .


Assembly !

It is very easy ... Except !
The one thing that was a little tricky !
Was plugging in the micro Rx ..
Elevator / rudder servo , those leads really could have been at the VERY least 10mm longer . ( Would have made all the difference in the world )

Other than that , seriously bush league !
Prop of choice for me = Gemfan 6030 ... Same thrust , less AMPs , and the motor sounds healthier and runs cooler .
Battery of choice ..
Zippy 350 looks like .. I use these in my OMP S720 without issue . + They fit in the nose of the Micro Tundra real nice .
HK says they weigh in at 25 grams ....

133+25 = 158 grams ( Power to weight might be 1:1 )
I think that motor is good for 150 to 160 grams of thrust depending on variables like voltage sag .
But then this thing does not pull a lot of amps , but it's a small motor and it does sound a little loaded with the 6x4 ..
As well , the motor did get warm during the Thrust stand runs ( Not hot ) . So I get the feeling it's close to maximum safe loads on that 6x4 .
Do I hunt for another motor ?

The servos seem a little ( ) , cheap ! So does one bother trying to make it all it can be or just enjoy it as is ?
Some tweaking , range checking and then hopefully a crash free maiden .
Posted by old4570 | Oct 16, 2020 @ 10:21 PM | 1,499 Views
Wow

Since the motor was on the test stand ! It only made sense to run some props thru it .

Factory prop is a black King Kong 6x4P ( 8400 - 8500 rpm for 161 grams @ 5Amp )

Next prop I tried was a Gemfan 6030 ( 12000 ish RPM 170 grams of thrust @ 3.8Amp ) I like that

Then a 5x4x4 ( 9200 rpm - 160 grams - 4.96A )
Then a 5x3x3 ( 12000 rpm - 153 grams - 3.8A )
Then a 5042x3 ( 10,000rpm - 148 grams - 4.65A )
Then a :- King Kong 6x4P grey ( 8700 rpm - 170grams - 5.31A )
Then a 6x4E ( 9000 rpm - 185 grams - 5.35A )
Then a 5x5 cyclone ( 9800 rpm - 162 grams - 4.77A )
Then a Gemfan 5x4 ( 11900 rpm - 158 grams - 3.84A )
GEMFAN 5030 ( 12600 rpm - 154 grams - 3.44A )

I should probably run a 5x3 to see if I am close to peak RPM for a 2s battery with this motor .
The 6030 gemfan certainly sings along nicely while other props sound a little laboured .
I must cut down and balance a KK 6x4 grey and see what it can do .
Also that 6x4E , that looks promising !
Posted by old4570 | Oct 16, 2020 @ 09:04 PM | 1,551 Views
Micro Tundra Motor Prop test (0 min 52 sec)



Micro Tundra Motor and prop on the test stand .
Watch the AMPs and Thrust , RPM reading might be ?

Again , as near as I can tell the motor is 1408 . ( It is a 1106 ) Olds was just being old and jumping to conclusions !
Cos he measured 14mm DIA ..

I will check RPM ASAP

Looks like Peak RPM was around 8500

More Props tested
Posted by old4570 | Oct 16, 2020 @ 07:11 PM | 1,679 Views
First ! Seems to be ok .. Nice N light N stuff .
2nd ...

THATS NO 1106 motor !!!!!! ( YES it is )

More like a 1408 ..... So say my callipers ! ( 14mm DIA ) ( Scales = 9.9 grams for motor and leads )

( Razzberries )

No way a 1106 would be swinging a 6x4 ... Yes it can !!!!!

Kudos to Hobbyking Australia Warehouse for such a quick delivery !

https://www.rcgroups.com/forums/show...d#post45667683 > Motor Prop test
Posted by old4570 | Oct 15, 2020 @ 08:30 PM | 2,272 Views
Yes , spent a lot of time hunting for a possible replacement motor for the Micro Tundra .
@ 1106 ? Thats a small motor .. ( I have a bunch off 110? motors )
Now if some one had said 1306 , ok I could believe that !

It's Fryers Day ( Pun ) , and I don't think snail mail will be that fast with Covid Restrictions .. Snail mail is just that recently .
Even local mail is lagging by over a week ! ( Which is crazy ) ( Come on snail man , where is my Micro SD card purchased from a store 10km away )

It's frustrating for sure , local mail takes over a week ! Seriously , mail from China can get here faster than buying local ! ( Well done DAG ) .

Anyways ... Looking forward to some micro Tundra fun .
Really want to put that motor on the test stand .. That will be interesting ! ( 1106 Hu ? )
Posted by old4570 | Oct 15, 2020 @ 12:27 AM | 2,777 Views
XK A160 with a micro 4ch Rx (0 min 26 sec)


Oh yeah ! I have a 4ch Micro Rx ( DSM2 ) , forgot about that .

Progress , just sorting stuff out , looks like the factory ESC is going back .. ( For now )

Bad weather is here and will be with us for a while . Anyways , making some progress .
Next I glue the servos into the fuse in the correct location , ( Control surfaces level )
And then it's just a matter of plugging stuff into the Rx and making sure to do some pre flight trims and maybe rates N stuff !
Posted by old4570 | Oct 13, 2020 @ 07:56 AM | 1,784 Views
It was on my To Buy List !
I told myself if the guys at HK ever bring out a Micro Tundra , I will cough up !

Well - Cough / Cough !

I also ordered a Micro Rx ( 2s ) that's 7ch with a built in 7A esc ..
Since the MT comes with a 6A esc , I am guessing the Micro Rx should be able to handle the MT . ( MT = Micro Tundra )

Might also be able to do some weight management by doing away with the ESC and servo lead adapters .

Oh dear oh dear !
Posted by old4570 | Oct 11, 2020 @ 04:16 PM | 1,953 Views
Another 6AM start !
Temperature near the park was 5.3deg C
Cam failed , ? SD card seems to have corrupted .. ( They can do that )
And my fingers were so cold !

Propeller this time around is a 6045 I dug up out of my prop box .
The 7035 prop was a huge fail .. 100% throttle and I was struggling to maintain altitude let alone gain some .

A shame the Cam failed to record . The 6045 was doing 5400 rpm static . ESC etc seemed to be fine .

I was able to fly and climb @ 90% throttle . Only thing was the TORQUE roll . I did not have enough trim available to counter it .
I took care of that when I came home , ( Adjusted my offset )

There is enough power to turn tight / climb gently / and run about 90% throttle . Since I was unable to achieve trim , I really could not risk a lower throttle setting . But once trimmed out properly for level flight , I may be able to get to 80% throttle or maybe less ?

So why bother when 2s would make the mini stick a little rocket ship ?
With all this solar action happening , I really wanted to explore low power ( 1s ) low current , flight . Before I spend money on solar panels .
So it's all about education and a little fun .
So next goal is to achieve trim , and then fly for one hour on a 18650 .
Yeah that's going to be boring ! But from the looks of things , that 3500mAh LG High discharge battery is barely taking a hit from a 10 minute flight .
So unfortunate I really could have used a higher KV motor because performance is so very marginal .
Posted by old4570 | Oct 10, 2020 @ 05:45 PM | 2,642 Views
18650 Mini Stick (7 min 46 sec)



Woke up @ 6AM , to go fly the 18650 battery powered Micro mini stick .
Goal was to test the 7035 prop ..

And it was a huge fail , the 6040E prop was much better .

Problem = Going from the 6040 to the 7035 there was only a few hundred RPM difference .
Sure I got more thrust with the larger DIA prop = BUTT !!!!

RPM + Propeller pitch = SPEED ..
So for the RPM range , the 6040 prop with slightly more pitch gave more speed in flight while the larger 7035 prop may have given more static thrust .
Thrust in this case is not the end all be all due to the low RPM the motor is turning 1s .
What is needed is more propeller pitch .

So broke the prop if you did not watch the video ..
Flying speed was sketchy .
Thankfully the ground was soft and muddy so the only thing to break was the prop .

I will try a 5x5.5 and see what happens .. ( Since I have one )

Update :

5x5.5 Prop = No thrust to speak off ! I lifted the nose up @ full throttle and let go the Mini stick .. It dropped like a stone ..

Rummage around the prop box ..

6x4.5 prop .. = Perhaps a little more hang time than the 6x4E - RPM is down to 5400 rpm ...

I think the Motor KV is too low , anyone contemplating 1s might want 6000KV +
This one is 3800kv .. Multiply by Voltage ( 4 ) = Hmmmm , and then maybe / divide by 50% ( ? )
I think I may need to move on and simply JAM a 2s battery in this model .
And call the 18650 experiment a D+ ( Need more Kv )
One more prop to try ( 6x4.5 )
Posted by old4570 | Oct 10, 2020 @ 06:30 AM | 2,356 Views
https://www.banggood.com/custlink/3GGhPvqT0v - WLToys F949s Cessna $51.55 USD at the Oz warehouse .. Might make for a stocking stuffer ?
https://www.banggood.com/custlink/mGKhtKMw6b - A flying ship ? ( What ? )
https://www.banggood.com/custlink/KmKYHKzwnt - Fokker tri plane , for those builders !
https://www.banggood.com/custlink/33DEHvqTA6 - Mini/micro SU-27 I could go for this ...
https://www.banggood.com/custlink/v3vdtmkwQz - Eachine Razor ?

I am so tired !
2 Days of stuffing around .. ( Computer Upgrade )
New CPU - MB - RAM ..

Apparently no one supports Win 8.1 !!!!!
So no MB drivers , no graphics drivers ..
I could step back to Win 7 - Cos Win 7 still has support !!!!
Or step up to Win 10 ...
Or take the alternate route and go Linux ....

Parking Hell - A Hobbits Tale !

I did all those things !!!!

Starting with Linux .. I put down my favourite flavour = Mint .
Mint is built on Ubuntu ..
But installing those AMD graphics drivers from AMD was a no go ... I really needed that radeon control interface .
So after Parking about for hours I had to give up .
I then tried to create a Win 10 USB stick in Linux .. Yeah , what a Parking waste of time that was !

Windows 7 ...
I did have Win 8.1 on a spare SSD as back up .. But with the new hardware it just crashed .
So I installed Win 7 on that drive ... I forget that my mouse does not work during the install ! ( Registered , original Win...Continue Reading