Search: Posts Made By: quorneng
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03-02-2021, 12:25 AM
Replies: 4
Views: 129
Posted By quorneng

That really is most impressive. Well Done. I...

That really is most impressive. Well Done.
I hope it flies as well as it looks.
02-27-2021, 12:11 AM
Replies: 32
Views: 655
Posted By quorneng

jangodog My own guess is that none of the...

jangodog
My own guess is that none of the changes you have made would be expected to stop it flying, although each would degrade performance a bit, but all together might be different.
I would...
02-24-2021, 09:59 PM
Replies: 32
Views: 655
Posted By quorneng

A higher C rating does not deliver more power...

A higher C rating does not deliver more power unless the amps being taken are causing a significant voltage drop in the battery..
According to your video the voltage was 22.5 V at the full power of...
02-24-2021, 03:46 PM
Replies: 32
Views: 655
Posted By quorneng

jangodog More power could indeed be an answer...

jangodog
More power could indeed be an answer but first you really need to be sure if it is simply the battery that is loosing performance. If it is the battery adding a more powerful motor will...
02-24-2021, 01:54 PM
Replies: 32
Views: 655
Posted By quorneng

I must agree with Solentlife. For a specific...

I must agree with Solentlife.
For a specific airframe the power to fly is directly proportional to its weight. Add 10% more weight and you need 10% more power. If the extra weight creates more drag...
02-15-2021, 06:56 PM
Replies: 9
Views: 366
Posted By quorneng

Mustangdude I note you stated that the battery...

Mustangdude
I note you stated that the battery took 1711 mAh to full from a figure of 27% capacity..
That charge does not represent 63% of 3500 which suggest either the battery had more in than 27%...
Forum: WWI Era
02-12-2021, 10:10 PM
Replies: 5,147
Views: 648,539
Posted By quorneng

qadas A very nice neat build but like all...

qadas
A very nice neat build but like all 'modern' Triplanes that nose is too long.
The full size Oberusel U II rotary used in the Triplane...
02-09-2021, 12:12 PM
Replies: 17
Views: 826
Posted By quorneng

Interesting but I am not sure there is a...

Interesting but I am not sure there is a relevance between a thick rudder and vortex generators.
As I understand it vortex generators are normally used on a lifting wing surface to control the the...
Replies: 6
Views: 380
Posted By quorneng

Flysfloats I does sound as if you are making a...

Flysfloats
I does sound as if you are making a big leap going to a 12s EDF system. I hope you have the necessary monitoring equipment (at least a Watt meter) as if anything you have is not up to the...
02-04-2021, 01:31 PM
Replies: 2
Views: 386
Posted By quorneng

Interesting fact. The round windows in the roof...

Interesting fact.
The round windows in the roof of the 3 passenger cabins were escape hatches! There were small interconnecting doors ways between the cabins but Imperial Airways insisted the single...
01-30-2021, 11:25 PM
Replies: 6
Views: 343
Posted By quorneng

jb48 As the taper is not that severe I would...

jb48
As the taper is not that severe I would simply set the CofG at 25% of the mean chord. The mean chord is 7.475 so 25% of that is 1.87" back from the leading edge and then flight test from...
01-28-2021, 01:58 AM
Replies: 17
Views: 826
Posted By quorneng

RKTLaunch If its anything like my saw that...

RKTLaunch
If its anything like my saw that plastic insert is 'pop out' removable so it would easy to use some packing (paper of very thin card) the raise it so it is flush with the table surface,...
01-24-2021, 12:17 PM
Replies: 8
Views: 624
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: 761
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: 761
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: 761
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: 677
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: 828
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: 573
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: 1,047
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: 1,047
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: 573
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: 573
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: 961
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: 879
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: 1,047
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: 1,047
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: 1,047
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: 879
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: 879
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...
Showing results 1 to 30 of 500
 


 
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