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Search: Posts Made By: quorneng
Forum: Electric Ducted Fan Jets Yesterday, 11:13 AM
Replies: 21
Views: 497
Posted By quorneng
Just a quick update. It flies quite well but...

Just a quick update.
It flies quite well but too slow in a turn and it enters an uncontrollable spin! Steep nose down with rapid rotation. It does sometimes pull out (by itself?) but mostly it just...
Forum: Scratch and Kit Built Aircraft 07-28-2014, 12:18 PM
Replies: 52
Views: 1,446
Posted By quorneng
Wildflyer Looks very impressive. With the...

Wildflyer
Looks very impressive.
With the relatively short distance between the fan and the nozzles I would wonder how 'equal' the airflow is between them.
On mine the fan is closer to the inlet...
Forum: Electric Ducted Fan Jets 07-25-2014, 12:04 PM
Replies: 21
Views: 497
Posted By quorneng
I understand the anhedral was used on the Harrier...

I understand the anhedral was used on the Harrier primarily because with its swept high wing layout it would have been too stable as a fighter. I believe the 'Dutch roll' characteristics are also...
Forum: Electric Ducted Fan Jets 07-24-2014, 05:49 PM
Replies: 21
Views: 497
Posted By quorneng
Well almost to my surprise it does indeed fly. ...

Well almost to my surprise it does indeed fly.
Not the easiest thing to control (the anhedral works perfectly - it has no roll stability whatsoever!) but plenty of push.
Being small and white I...
Forum: Electric Ducted Fan Jets 07-22-2014, 11:50 AM
Replies: 21
Views: 497
Posted By quorneng
The saddle batteries between the ducts. 176723 ...

The saddle batteries between the ducts.
176723
The scale all moving tailplane has scale anhedral.
176721
Probably not necessary but the tailplane is fully mass balanced with 0.8g of lead in the...
Forum: Beginners 07-21-2014, 12:29 AM
Replies: 10
Views: 240
Posted By quorneng
Just to put in perspective by dropping the volts...

Just to put in perspective by dropping the volts by 1/4 will reduce the current by roughly the same amount but power is volts x amps so it will be 0.75x0.75 which is equals 0.56

In other words...
Forum: Indoor & Micro Electric Planes 07-15-2014, 04:17 PM
Replies: 22
Views: 480
Posted By quorneng
rtfm Your DX4 will do fine. How do you think we...

rtfm
Your DX4 will do fine. How do you think we all got on (and I still do) before the days of programmable TXs!

Depending of what you fly full size your experience should have some benefit as...
Forum: Beginners 07-15-2014, 03:46 PM
Replies: 10
Views: 240
Posted By quorneng
RayDF If you maintain the planes exact center...

RayDF
If you maintain the planes exact center of gravity I doubt you will notice that much difference.
It will have to fly a bit faster (not that much as lift is proportional to the square of the...
Forum: Scratch and Kit Built Aircraft 07-15-2014, 10:33 AM
Replies: 24
Views: 312
Posted By quorneng
Nigel At 10mm thick you can certainly get in a...

Nigel
At 10mm thick you can certainly get in a micro servo lying it on its side.

This is the underside of the wing on my Depron Fairey Delta 2 showing its aileron servo.
176620
The wing is 10mm...
Forum: Scratch and Kit Built Aircraft 07-15-2014, 12:33 AM
Replies: 24
Views: 312
Posted By quorneng
Nigel Why not have aileron servos buried in the...

Nigel
Why not have aileron servos buried in the wings? Then only their electric wires have to go round any corners.;)
Forum: Scratch and Kit Built Aircraft 07-14-2014, 03:29 PM
Replies: 24
Views: 312
Posted By quorneng
HO-229 The engines were not actually one above...

HO-229
The engines were not actually one above the other but staggered.
Lower forward, Upper aft.
176604
As far as working on the Lightning was concerned I understand everything was a nightmare!
Forum: Scratch and Kit Built Aircraft 07-14-2014, 02:03 PM
Replies: 24
Views: 312
Posted By quorneng
I did look seriously at an EDF EE Lightning. ...

I did look seriously at an EDF EE Lightning.
Keeping to scale the problem is indeed the fuselage, it is just too narrow and the intake area is tiny even with a single EDF. It would be difficult to...
Forum: Electric Ducted Fan Jets 07-13-2014, 02:29 PM
Replies: 21
Views: 497
Posted By quorneng
A start on the rest of the 'Harrier'. The wings...

A start on the rest of the 'Harrier'.
The wings on a Harrier are remarkably small. Scaled to the size of the fuselage they would only be 17" span.
As this is really only a test piece I decided to...
Forum: Electric Ducted Fan Jets 07-06-2014, 07:41 PM
Replies: 21
Views: 497
Posted By quorneng
The space between the ducts is just about big...

The space between the ducts is just about big enough for an 850mAh 3s so giving 1700Mah in total.
176407
The fan takes 20A at full power which is just 12C from the battery so this set up should...
Forum: Foamies 07-01-2014, 02:04 AM
Replies: 14
Views: 271
Posted By quorneng
Of course if the foam wing is hollow hiding a...

Of course if the foam wing is hollow hiding a servo wire is no problem! ;)
Forum: Beginners 06-27-2014, 10:02 PM
Replies: 48
Views: 663
Posted By quorneng
rajkojus Just remember not all foams are the...

rajkojus
Just remember not all foams are the same!
Some are light and brittle others are heavier and flexible. For home building most require some sort of reinforcement particularly for the wings....
Forum: Electric Ducted Fan Jets 06-27-2014, 04:26 PM
Replies: 21
Views: 497
Posted By quorneng
After some thought I decided a flat 'profile'...

After some thought I decided a flat 'profile' fuselage would be the simplest way to get the 4 nozzle duct into the air but to something like scale for the ducts it would only have a 17" wing span...
Forum: General Electric Discussions 06-23-2014, 12:25 AM
Replies: 16
Views: 417
Posted By quorneng
Karnsy You should not assume that just because...

Karnsy
You should not assume that just because you have a plane flying 'hands off' that the CofG is automatically 'right'.
Stable flight is perfectly possible with a rearward CofG (within limits)...
Forum: Scale E-Powered Aircraft 06-20-2014, 08:42 PM
Replies: 24
Views: 521
Posted By quorneng
I do wonder if as planes get older, like cars,...

I do wonder if as planes get older, like cars, their performance falls off more than people realise.
The Cessna 337 manual states: (taken from an NTSB accident report)
"Single-engine climb...
Forum: Scale E-Powered Aircraft 06-20-2014, 12:37 AM
Replies: 24
Views: 521
Posted By quorneng
iFLYrc_Vic My 53" 337 is actually an O-2 and is...

iFLYrc_Vic
My 53" 337 is actually an O-2 and is entirely scratch built.
176168
Being made largely from 3mm Depron it is very light (22oz all up) so no shortage of performance on its 240W combined...
Forum: Scale E-Powered Aircraft 06-18-2014, 12:09 PM
Replies: 24
Views: 521
Posted By quorneng
On my 53" Skymaster I used exactly the same...

On my 53" Skymaster I used exactly the same motors with identical diameter and pitch props front and rear. The rear has the LH prop.
The static current draw to each motor is very similar and...
Forum: Electric Ducted Fan Jets 06-17-2014, 01:31 AM
Replies: 21
Views: 497
Posted By quorneng
My ultimate goal is to create a scale Harrier...

My ultimate goal is to create a scale Harrier with true scale inlets and exhaust nozzles along the same lines as I did with my Fairey Delta 2 and XB70 but that is still some way off. A simple proof...
Forum: Electric Ducted Fan Jets 06-16-2014, 04:33 PM
Replies: 21
Views: 497
Posted By quorneng
The front pair of the four nozzle test duct. ...

The front pair of the four nozzle test duct.
The airflow is divided into 4 quadrants. Cascades in the L&R sections direct the flow outward to further cascades that direct it rearward.
176100
The...
Forum: Electric Ducted Fan Jets 06-14-2014, 10:54 AM
Replies: 21
Views: 497
Posted By quorneng
Cascade ducting

The Harrier/AV8 uses cascade 'vectoring' nozzles.
176063
Whilst I have no intention (at this stage!) to build a VTOL plane I wondered if it would be possible to use this principle to have multiple...
Forum: Beginners 06-04-2014, 09:38 PM
Replies: 32
Views: 8,935
Posted By quorneng
There is nothing stopping you binding two (or...

There is nothing stopping you binding two (or more) receivers to the same model number on a DX6i. It is just they will have the same characteristics - just like they do on a DX6 or any pre computer...
Forum: Scratch and Kit Built Aircraft 05-29-2014, 07:01 PM
Replies: 19
Views: 571
Posted By quorneng
Is flexing such a bad thing? By trying to...

Is flexing such a bad thing?
By trying to eliminate it you are loosing much of the potential strength in Depron.
The trick is to keep the aerodynamics uner control whilst allowing the flex.
This...
Forum: Scratch and Kit Built Aircraft 05-25-2014, 12:45 PM
Replies: 13
Views: 499
Posted By quorneng
Hi Chellie I shall be watching this with...

Hi Chellie
I shall be watching this with interest.
What will be its span?

Just for interest the booms on my 53" O-2 (337) are hollow built up in 3mm Depron and nothing else - no reinforcing at...
Forum: General Electric Discussions 05-23-2014, 03:04 PM
Replies: 137
Views: 3,245
Posted By quorneng
Everyone to their own opinion but Orange...

Everyone to their own opinion but Orange receivers have always worked fine for me.
Forum: Scratch and Kit Built Aircraft 05-21-2014, 06:30 PM
Replies: 52
Views: 1,446
Posted By quorneng
The 'active' canard certainly worked although...

The 'active' canard certainly worked although using the dual rate switch to limit the elevon elevator also reduced the pitch authority quite dramatically.
This suggests the canard is not that...
Forum: Scratch and Kit Built Aircraft 05-17-2014, 09:18 PM
Replies: 52
Views: 1,446
Posted By quorneng
The holes that had to be cut in the fuselage to...

The holes that had to be cut in the fuselage to instal the snake and remote canard servo.
175690
T%he canard elevator installed.
175691
All tested and the fuselage made good.
175692
The Orange...
Showing results 1 to 30 of 500

 
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