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Search: Posts Made By: Quorneng
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Forum: Aerodynamics
04-03-2019, 10:29 AM
Replies: 4
Views: 972
Posted By Quorneng

Sifez It does rather depend on what you mean by...

Sifez
It does rather depend on what you mean by 'endurance'.
For maximum aerodynamic efficiency a conventional wing and tail is actually better than a flying wing. Something along the lines of a...
Replies: 2
Views: 422
Posted By Quorneng

Google is your friend. 4 mm E-clips are readily...

Google is your friend.
4 mm E-clips are readily available on ebay.
Replies: 5
Views: 494
Posted By Quorneng

The issue is going to be did the current drawn by...

The issue is going to be did the current drawn by the motor over load the ESC. If the motor was actually still running at the end then the ESC should be ok. If the motor stopped "un-commanded" then...
08-01-2018, 11:03 AM
Replies: 2
Views: 920
Posted By Quorneng

Very nice but the Spitfire 24 was Griffon...

Very nice but the Spitfire 24 was Griffon powered. That beautiful 5 blade prop is going round the wrong way!...
05-19-2018, 11:08 AM
Replies: 1
Views: 348
Posted By Quorneng

If you don't need the power changing to a 5000...

If you don't need the power changing to a 5000 mAh 4s would make sense.
You would be loosing 20% voltage so rather more than that in maximum power but you are also saving 20% battery weight so you...
04-12-2018, 10:23 AM
Replies: 6
Views: 794
Posted By Quorneng

You could worse than search the Hobbking web...

You could worse than search the Hobbking web site. They give the physical dimensions, capacity and weight of each battery..Whether you end up buying from them is then down to you.
11-25-2017, 02:11 PM
Replies: 1
Views: 3,745
Posted By Quorneng

TIG Brushless motors of 750 Watts power can...

TIG
Brushless motors of 750 Watts power can readily go up to really high speeds but you don't say what the turbine 'ignition' speed is. Knowing the required speed will allow an appropriate...
Forum: Aerodynamics
10-03-2017, 06:35 AM
Replies: 29
Views: 2,851
Posted By Quorneng

Is not the issue that although the reduction in...

Is not the issue that although the reduction in the stall speed may be small it does mean you now have a bigger 'safety margin' using the same landing speed?

The other aspect is the power required...
Replies: 2
Views: 673
Posted By Quorneng

The Castle Creation web site...

The Castle Creation web site (http://www.castlecreations.com/en/phoenix-edge-50-esc-010-0102-00) tells you the Phoenix Edge 50 amp ESC has an auto calibrating throttle so you don't have to do...
09-14-2017, 06:46 AM
Replies: 4
Views: 1,080
Posted By Quorneng

A few more details would help. What F104 is it?...

A few more details would help.
What F104 is it?
What battery? (mAh, no of cells,, C rating)
Have you measured the current?
Replies: 15
Views: 548
Posted By Quorneng

Your prop may be balanced but is it running...

Your prop may be balanced but is it running centered & true on the motor shaft?
With the prop running slowly and looking directly from the side do both prop tips pass in exactly the same place?
If...
Forum: Aerodynamics
02-13-2017, 05:02 PM
Replies: 11
Views: 3,757
Posted By Quorneng

mikes68charger It would perhaps be more logical...

mikes68charger
It would perhaps be more logical to use the outers as ailerons and the inners just as elevators.
As a flying wing rather than a delta the control surfaces are close to the CofG and...
12-29-2016, 08:03 AM
Replies: 5
Views: 527
Posted By Quorneng

Heat is the enemy of LiPo caused by the current...

Heat is the enemy of LiPo caused by the current (Amps) passing through the batteries internal resistance.
You cant do much about the heat generated at discharge as you tend need the current to...
Forum: Aerodynamics
12-12-2016, 03:01 PM
Replies: 29
Views: 2,851
Posted By Quorneng

The increase in landing speed due to an increase...

The increase in landing speed due to an increase in weight may not sound that significant but remember the kinetic energy of the plane also rises by the square of the speed so a 5% increase in weight...
10-03-2016, 10:58 AM
Replies: 8
Views: 694
Posted By Quorneng

Just remember that when soldering bigger...

Just remember that when soldering bigger connectors onto thicker gauge wire you need to be able to provide a lot of heat quickly rather than high temperature so the bigger the tip the better!
My...
09-23-2016, 04:08 PM
Replies: 4
Views: 652
Posted By Quorneng

JGalt Yes, its all down to the motor's...

JGalt
Yes, its all down to the motor's Electronic Speed Controller (ESC). It not only controls the motor speed according to the throttle signal sent by the transmitter but with a completely separate...
09-11-2016, 07:23 AM
Replies: 12
Views: 3,802
Posted By Quorneng

The EFLU2680 F4U Corsair has a brushed motor. ...

The EFLU2680 F4U Corsair has a brushed motor.
My bet is its the brushes that are in the process of failing. Sooner or later they always do.
09-11-2016, 07:16 AM
Replies: 5
Views: 556
Posted By Quorneng

A safety officer would say (with some...

A safety officer would say (with some justification) that the only truly safe condition for an electric anything is when the power source is physically disconnected. Relying on a switch increases the...
09-05-2016, 02:49 AM
Replies: 5
Views: 556
Posted By Quorneng

A bit puzzled. You say no power is getting to...

A bit puzzled.
You say no power is getting to the receiver but the motor beeps correctly.
As far as I am aware if the ESC does not get the correct signal from the receiver it will not 'arm'...
08-10-2016, 03:45 AM
Replies: 2
Views: 551
Posted By Quorneng

smitty4980 The capacity of the battery (its...

smitty4980
The capacity of the battery (its mAh) does not impact on the ESC. Its the motor that draws the current from the battery.
So provided you are using the recommended motor and it has the...
07-29-2016, 03:45 AM
Replies: 1
Views: 522
Posted By Quorneng

tewitt1949 1. How much charge did you put in to...

tewitt1949
1. How much charge did you put in to start with?
2 LiPo capacity can improve after a few cycles.
And don't automatically assume a battery actually has the capacity a manufactures might...
07-25-2016, 09:47 AM
Replies: 3
Views: 1,161
Posted By Quorneng

daveopam The fact that the motor did not start...

daveopam
The fact that the motor did not start properly is very suspicious suggesting that something has shorted. Check the wiring very carefully but it may be a problem inside the motor which you...
07-15-2016, 05:05 AM
Replies: 4
Views: 916
Posted By Quorneng

With no experience in DFs are you sure such a...

With no experience in DFs are you sure such a large plane is the ideal thing to start with?
You will be dealing with a lot of amps (even more so with only 3 or 4s) and with ducted fans you have to...
05-31-2016, 01:46 AM
Replies: 5
Views: 1,867
Posted By Quorneng

G.F.Reid Shipping LiPo batteries is a...

G.F.Reid
Shipping LiPo batteries is a nightmare.
Many carriers will not and even those that do require special packaging and labelling.
If you can buy them from a supplier in your country the...
05-27-2016, 02:23 PM
Replies: 1
Views: 1,178
Posted By Quorneng

rgeorge I don't know that particular charger...

rgeorge
I don't know that particular charger but the fact that it will not recognise either of your 2s LiPo suggest 3 possibilities
1. You are not setting up the charger correctly for 2s charging....
Showing results 1 to 25 of 164
 


 
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