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Search: Posts Made By: quorneng
Forum: Scratch and Kit Built Aircraft Today, 10:58 AM
Replies: 11
Views: 350
Posted By quorneng
Thigs move on slowly. The nose section under...

Thigs move on slowly.
The nose section under construction built the same way as a half shell over the plan.
177417
Obviously the planking is very much more complicated that the constant section ...
Forum: Indoor & Micro Electric Planes Yesterday, 06:14 PM
Replies: 5
Views: 88
Posted By quorneng
sentinel48 All I can suggest is that you try...

sentinel48
All I can suggest is that you try and build a scale non RC, non powered plane and see if you can get it to glide in a stable manner. Even that will not be easy.
There are some very light...
Forum: Electric Ducted Fan Jets 09-16-2014, 12:29 AM
Replies: 23
Views: 774
Posted By quorneng
The final part of the story - it broke. :concern:...

The final part of the story - it broke. :concern:
Not surprising really as I was doing an outside loop.
177394
Note the LH servo has been pulled out by its wire through the upper wing...
Forum: Scratch and Kit Built Aircraft 09-15-2014, 08:42 PM
Replies: 47
Views: 1,224
Posted By quorneng
Sham Whilst I might agree in principle that...

Sham
Whilst I might agree in principle that flat aerofoil wings are unlikely to be scale, however at small sizes the aerodynamic penalty for using a 'flat' wing is not great, indeed it can have an...
Forum: Delta & Flying Wings 09-08-2014, 12:52 AM
Replies: 26
Views: 480
Posted By quorneng
As a delta pusher adding side thrust may not work...

As a delta pusher adding side thrust may not work that well. It will rather depend on how the delta responds to a sideways force.
All my Scale hand launched deltas do tend to an initial roll so it...
Forum: Delta & Flying Wings 09-07-2014, 11:17 PM
Replies: 26
Views: 480
Posted By quorneng
"Roll right over" What I meant was a fully...

"Roll right over"
What I meant was a fully stalled delta will not just 'drop a wing' but will roll (and will continue to do so) under the influence of motor torque until the speed builds up...
Forum: Delta & Flying Wings 09-07-2014, 02:42 AM
Replies: 26
Views: 480
Posted By quorneng
CDN71 Having the prop the wrong way round would...

CDN71
Having the prop the wrong way round would certainly make thing worse as you have all the torque but much less thrust.
To make matters worse a delta has a relatively short wing span so the...
Forum: Scratch and Kit Built Aircraft 09-03-2014, 09:17 PM
Replies: 120
Views: 3,895
Posted By quorneng
Well done. I still think those main wheels are...

Well done.
I still think those main wheels are a bit too far back, not so much a lift off as a haul off!
Forum: Scratch and Kit Built Aircraft 09-02-2014, 12:28 PM
Replies: 120
Views: 3,895
Posted By quorneng
Nigel My own thoughts are: 1. You clearly...

Nigel
My own thoughts are:
1. You clearly have sufficient thrust so it ain't that!
2. I wonder if you have too much weight on the nose wheel with the result it needs a lot of speed and up elevator...
Forum: Scratch and Kit Built Aircraft 09-01-2014, 11:32 AM
Replies: 11
Views: 350
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 08-31-2014, 10:50 PM
Replies: 47
Views: 1,224
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 08-31-2014, 07:06 PM
Replies: 11
Views: 350
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: 11
Views: 350
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 jury strut removed.
Then the one piece inner...
Forum: Scratch and Kit Built Aircraft 08-29-2014, 11:35 AM
Replies: 11
Views: 350
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: 120
Views: 3,895
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: 11
Views: 350
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: 11
Views: 350
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: 11
Views: 350
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: 28
Views: 717
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: 2,731
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: 368
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: 23
Views: 774
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: 1,793
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: 1,793
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: 1,834
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: 23
Views: 774
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: 1,834
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: 23
Views: 774
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: 23
Views: 774
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: 23
Views: 774
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...
Showing results 1 to 30 of 500

 
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