Search: Posts Made By: quorneng
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01-24-2021, 12:17 PM
Replies: 6
Views: 143
Posted By quorneng

RKTLaunch In a small model you would be...

RKTLaunch
In a small model you would be surprised just how relatively heavy retracts are.
Its not just the units themselves but the extra reinforcing you have to build in to mount them is a way...
01-19-2021, 01:16 AM
Replies: 22
Views: 394
Posted By quorneng

RKTLaunch If you really want no external...

RKTLaunch
If you really want no external linkage and don't mind its limitations then a torque tube is probably the best option. .
The only time I could not tolerate any external link for...
01-18-2021, 01:31 AM
Replies: 22
Views: 394
Posted By quorneng

Just a point but each servo is only moving 1/2...

Just a point but each servo is only moving 1/2 the control surface area so can be a smaller, particularly as the linkage is simpler, so the total weight of a 'two servo' system is likely to be less...
01-17-2021, 11:07 PM
Replies: 22
Views: 394
Posted By quorneng

RKTLaunch A single aileron servo is quite...

RKTLaunch
A single aileron servo is quite possible but it does make sourcing the required bits for an efficient linkage a bigger task and it requires a degree of mechanical adjustment to be...
Forum: Beginners
01-17-2021, 10:52 PM
Replies: 4
Views: 270
Posted By quorneng

boodaghost HK 'Zippy' still are good reliable...

boodaghost
HK 'Zippy' still are good reliable batteries! Not the highest output rate but they last very well if treated right.
Everything is a bit lighter and more powerful but it only makes a...
01-15-2021, 10:23 PM
Replies: 4
Views: 374
Posted By quorneng

That looks a very interesting layout but it does...

That looks a very interesting layout but it does raise the question as to whether any 9x6 prop is good for the sort of power you are considering.
Even if you find a suitable prop the aerodynamic...
01-08-2021, 05:02 PM
Replies: 5
Views: 322
Posted By quorneng

An all moving V tail sounds quite ambitious. I...

An all moving V tail sounds quite ambitious.
I used a V tail on my sub 250 g all printed powered glider but not all moving in fact not even rudder just elevator.
188335
Just be aware a V tail when...
01-08-2021, 03:15 PM
Replies: 22
Views: 612
Posted By quorneng

Oooops! Of course 3.74V Actually an...

Oooops!
Of course 3.74V
Actually an interesting exercise as it is a 850 5s (there is no such thing at HK) made up from a 2S and 3S.
188332
188333
Needs care and attention with the soldering!
01-08-2021, 01:45 PM
Replies: 22
Views: 612
Posted By quorneng

Just as confirmation of what solenlife says I...

Just as confirmation of what solenlife says I checked the cell voltages of a brand new 3 cell battery as delivered. They were all identical at 7.74 Volts.
01-08-2021, 01:36 PM
Replies: 5
Views: 322
Posted By quorneng

That looks a reasonable design although it will...

That looks a reasonable design although it will depend on how it is covered.
A conventional taught film covering creates a considerable inward 'pull' on the leading and trailing edges. If that...
01-07-2021, 09:42 PM
Replies: 5
Views: 322
Posted By quorneng

Designing a permanent glued structure that can be...

Designing a permanent glued structure that can be readily repaired is going to be about finding a suitable compromise.
My suggestion based on my experience using printed ribs is to built some test...
01-06-2021, 01:46 PM
Replies: 7
Views: 519
Posted By quorneng

A brushless motor as used in a RC plane has a...

A brushless motor as used in a RC plane has a very limited starting torque so almost any static resistance in the drive train will prevent it achieving a start. The reason brushed motors are commonly...
01-06-2021, 11:28 AM
Replies: 12
Views: 575
Posted By quorneng

RKTLaunch For a vertical take off the total...

RKTLaunch
For a vertical take off the total weight is not too much of a problem, it just has to less than the available thrust! However 'balancing' a plane on thrust is a lot more difficult.
If the...
01-06-2021, 01:23 AM
Replies: 22
Views: 612
Posted By quorneng

If you previously took the battery to almost...

If you previously took the battery to almost empty in 45 minutes then a 20 minute flight is 44% as long. it was fully charged so putting back 1450 mAh (about 41%) is about right.
The duration in a...
01-05-2021, 10:50 PM
Replies: 22
Views: 612
Posted By quorneng

Mustangdude Tx voltage is probably reasonable....

Mustangdude
Tx voltage is probably reasonable. The Rx is also probably correct but it is the voltage at the receiver not the LiPo itself. The receiver voltage is kept at a regulated 5V almost...
01-05-2021, 04:43 PM
Replies: 22
Views: 612
Posted By quorneng

Those words on their own would mean the battery...

Those words on their own would mean the battery in the transmitter not the battery in the plane, unless of course you have telemetry measuring the plane's battery voltage in the plane and...
01-04-2021, 08:44 PM
Replies: 12
Views: 575
Posted By quorneng

Do you know the wing area and a guess at the...

Do you know the wing area and a guess at the likely all up weight?

I have a suspicion the wing loading (oz/sg ft) is going to end up at an realistic figure for the size of plane.
With full...
01-04-2021, 11:55 AM
Replies: 12
Views: 575
Posted By quorneng

RKTLaunch Yes the connection from the ESC to...

RKTLaunch
Yes the connection from the ESC to the receiver not only controls the ESC (via the outer wires) but powers the receiver itself and all the servos through red wire coming from the BEC built...
01-03-2021, 11:00 PM
Replies: 12
Views: 575
Posted By quorneng

One or two batteries really comes down to the...

One or two batteries really comes down to the best configuration to fit in the plane.
About the only consideration is that if you are using two batteries they really should be identical, not just...
Forum: Beginners
01-02-2021, 09:17 PM
Replies: 15
Views: 632
Posted By quorneng

The most important issue with any servo it to...

The most important issue with any servo it to pick one suitable for the duty it has to perform and the capability of the power supply.
A more powerful means both more weight and more amp draw.
The...
Forum: Beginners
01-01-2021, 10:46 AM
Replies: 15
Views: 632
Posted By quorneng

The servo tester can either be powered from a...

The servo tester can either be powered from a separate source when testing a servo but when you are testing an ESC it will take its power from the BEC if one is fitted.
The centre and earth pins on...
Forum: Beginners
12-31-2020, 10:23 PM
Replies: 15
Views: 632
Posted By quorneng

RKTLaunch This video shows how to use a GT...

RKTLaunch
This video shows how to use a GT Power RC servo tester.
https://www.youtube.com/watch?v=h59Da-WS0Sk

As you are finding out there is no guarantee that components from different...
Forum: Beginners
12-31-2020, 05:52 PM
Replies: 15
Views: 632
Posted By quorneng

A twin 70 mm EDF is certainly a big jump from...

A twin 70 mm EDF is certainly a big jump from free flight.
In you list of equipment I assume you mean two Castle Talon 90amp ESC w/20a BEC. You can test each EDF one at a time from one ESC and they...
12-27-2020, 09:15 PM
Replies: 2
Views: 531
Posted By quorneng

Still no lightweight at 1kg. How much thrust do...

Still no lightweight at 1kg.
How much thrust do you get?
Forum: Beginners
12-24-2020, 04:20 PM
Replies: 5
Views: 591
Posted By quorneng

diverdon The AeroScout in particular uses a...

diverdon
The AeroScout in particular uses a fairly standard set of 'bits' (2200 mAh 3s, 30A ESC, brushless motor, 6 channel rx, and micro servos) that would be applicable to a range of modest sized...
12-22-2020, 09:14 PM
Replies: 3
Views: 164
Posted By quorneng

The Triton 2 can charge at up to 7A. You would...

The Triton 2 can charge at up to 7A. You would need a really big 'wall wart' to deliver that sort of power.
You need a 12V 100W supply unit.
Forum: Beginners
12-17-2020, 11:24 PM
Replies: 2
Views: 590
Posted By quorneng

Strange! Exactly the same question and...

Strange!
Exactly the same question and attachment has been posted today by "Theairplaneboy" on the RCGroups web site.
If that is indeed you it is not likely to encourage replies.
Forum: Foamies
12-13-2020, 06:54 PM
Replies: 6
Views: 952
Posted By quorneng

Well done! Did it survive the landing undamaged?

Well done!
Did it survive the landing undamaged?
12-11-2020, 09:28 PM
Replies: 11
Views: 1,348
Posted By quorneng

If you get clever a nose mounted motor can be...

If you get clever a nose mounted motor can be almost hidden.
A scale Glasflugel Libelle 2.1 m span with a nose motor & folding prop.
188304
Not quite an exact scale nose profile but very close to...
Forum: Foamies
11-28-2020, 11:18 PM
Replies: 6
Views: 952
Posted By quorneng

What went wrong?

What went wrong?
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