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Search: Posts Made By: quorneng
Forum: Scratch and Kit Built Aircraft Today, 11:32 AM
Replies: 10
Views: 273
Posted By quorneng
The nacelle has a substantial air intake and...

The nacelle has a substantial air intake and exhaust so the intention is to use it to cool the ESC.
177143
The drum mount is fixed on to the bulkhead using self tapping screws. The particle board...
Forum: Scratch and Kit Built Aircraft Yesterday, 10:50 PM
Replies: 29
Views: 894
Posted By quorneng
Chellie Looking good. "thrown around...

Chellie
Looking good.
"thrown around violently" I hope its strong enough!

If the BECs are 'linear' there is no need to remove the red wire. They work quite happily together. My Concorde has all...
Forum: Scratch and Kit Built Aircraft Yesterday, 07:06 PM
Replies: 10
Views: 273
Posted By quorneng
The last plank, or rather the space where it is...

The last plank, or rather the space where it is has to fit!
177122
always the most difficult as it has to fit both sides all along it length.
The engine nacelles are huge (16" long!) and would not...
Forum: Scratch and Kit Built Aircraft 08-30-2014, 04:02 PM
Replies: 10
Views: 273
Posted By quorneng
Completing the fuselage formers is a slow...

Completing the fuselage formers is a slow process.
This shows the sequence.
177102
First the remaining half of the former ring is glued on and the jusy strut removed.
Then the one piece inner...
Forum: Scratch and Kit Built Aircraft 08-29-2014, 11:35 AM
Replies: 10
Views: 273
Posted By quorneng
With the half shell almost fully planked it can...

With the half shell almost fully planked it can be lifted from the plan.
177088
A start on the other half of the formers.
177089
It occurred to me that the fuselage would need local reinforcing...
Forum: Scratch and Kit Built Aircraft 08-29-2014, 11:23 AM
Replies: 104
Views: 3,408
Posted By quorneng
Nigel Looks nice. Compared to the actual wing...

Nigel
Looks nice.
Compared to the actual wing span the elevons are not that small. It just we seem used to fashionable full span ones!
With the motors well outboard the initial response may be a...
Forum: Scratch and Kit Built Aircraft 08-27-2014, 03:03 PM
Replies: 10
Views: 273
Posted By quorneng
At this stage any amount of thinking things out...

At this stage any amount of thinking things out can save a lot of time in the long run.
For a really lightweight build the real problem is the fuselage (its by far the biggest bit!) rather than the...
Forum: Scratch and Kit Built Aircraft 08-25-2014, 11:58 AM
Replies: 10
Views: 273
Posted By quorneng
A little bit further. On of the problem...

A little bit further.
On of the problem starting from a small 3 view is the lines get very blurred when printed out at the intended size.
Like this.
177046
So after a few hours redrawing the...
Forum: Scratch and Kit Built Aircraft 08-23-2014, 11:14 PM
Replies: 10
Views: 273
Posted By quorneng
Bombardier Q400

A scratch build twin.;)
177039
I have seen these flying out of Liverpool Airport and at any altitude the wings look like pencils!
177040
It seems like a good subject for a really lightweight...
Forum: General Electric Discussions 08-21-2014, 05:45 PM
Replies: 27
Views: 583
Posted By quorneng
I think its a bit optimistic the say a hybrid...

I think its a bit optimistic the say a hybrid design is 'scale free'. Neither electric motors nor batteries scale up well. It get progressively more difficult to get their generated heat out the...
Forum: Scratch and Kit Built Aircraft 08-21-2014, 11:32 AM
Replies: 64
Views: 2,541
Posted By quorneng
A twin and a bit more time! Would this count? ...

A twin and a bit more time!
Would this count?
177012
No real reason other than apart from Concorde it must have about the longest fuselage in relation to its span and certainly its wing area....
Forum: Batteries & Chargers 08-11-2014, 06:59 PM
Replies: 15
Views: 332
Posted By quorneng
Adam If your Super Cub has the balancing...

Adam
If your Super Cub has the balancing charger you should be ok as far as the LiPo is concerned as it should stop charging it when it is full but charging on your bedroom floor is certainly not...
Forum: Electric Ducted Fan Jets 08-11-2014, 12:43 AM
Replies: 22
Views: 668
Posted By quorneng
Its spin characteristics continued to baffle me. ...

Its spin characteristics continued to baffle me.
It did not feel like a conventional spin as it appeared to occur during normal flight and there was no recovery.
By the fourth crash the cascade...
Forum: Hi-Performance and Sailplanes 07-30-2014, 09:14 PM
Replies: 16
Views: 1,696
Posted By quorneng
Hardly 'wrong' as if you are carrying ballast you...

Hardly 'wrong' as if you are carrying ballast you actually need more lift to support it.

Provided the ballast is positioned on the centre of gravity the actual trim characteristics of the plane do...
Forum: Hi-Performance and Sailplanes 07-30-2014, 02:31 PM
Replies: 16
Views: 1,696
Posted By quorneng
seng30904 Surely ballast increases the plane's...

seng30904
Surely ballast increases the plane's speed without altering its aerodynamic characteristics.
In technical terms it moves the gliders polar curve along the speed axis but does not change...
Forum: Scratch and Kit Built Aircraft 07-30-2014, 10:50 AM
Replies: 55
Views: 1,744
Posted By quorneng
Was it the fan supplied with the plane and does...

Was it the fan supplied with the plane and does it specifically say to use a 4s?
If so you could expect a replacement from the manufacturer.

Mine uses an all plastic (cheap!) AEO 70mm EDF but it...
Forum: Electric Ducted Fan Jets 07-29-2014, 11:13 AM
Replies: 22
Views: 668
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: 55
Views: 1,744
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: 22
Views: 668
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: 22
Views: 668
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: 22
Views: 668
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: 308
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: 26
Views: 797
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: 308
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: 402
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: 402
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: 402
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: 402
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: 22
Views: 668
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: 22
Views: 668
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...
Showing results 1 to 30 of 500

 
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