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Search: Posts Made By: quorneng
Forum: Scratch and Kit Built Aircraft Yesterday, 04:53 PM
Replies: 7
Views: 173
Posted By quorneng
Bald Paul A tip. A CAD package is not the only...

Bald Paul
A tip. A CAD package is not the only way to produce wing rib profiles.
This set are accurately reproduced from a drawn NACA 63418 wing profile I found on the web.
179725
They are...
Forum: Scratch and Kit Built Aircraft 03-01-2015, 11:55 PM
Replies: 7
Views: 173
Posted By quorneng
Bald Paul I suppose in reality nobody just sits...

Bald Paul
I suppose in reality nobody just sits down and designs a plane just from first principles. Invariably it is a progression from previous experience - or even somebody else's!
There is...
Forum: Scratch and Kit Built Aircraft 02-28-2015, 12:11 PM
Replies: 21
Views: 626
Posted By quorneng
On the grounds I had little to loose I did...

On the grounds I had little to loose I did actually manage to maiden the Vampire early this morning before the wind got too strong but it was raining.
Not ideal conditions for a tissue covered...
Forum: Scratch and Kit Built Aircraft 02-27-2015, 11:34 PM
Replies: 52
Views: 1,658
Posted By quorneng
As the Vampire is my second build and my first...

As the Vampire is my second build and my first did fly quite successfully within the original time scale I think it would be unfair to the others to extend the dead line on my behalf.
So unless some...
Forum: Scratch and Kit Built Aircraft 02-27-2015, 12:22 PM
Replies: 52
Views: 1,658
Posted By quorneng
I do at least have the video(s) for the Canberra...

I do at least have the video(s) for the Canberra 'in the bag' so to speak but at the moment the Vampire is grounded by the weather.
Gusty 12 mph today - a bit high for a 4oz plane maiden - rising to...
Forum: Scratch and Kit Built Aircraft 02-26-2015, 12:06 AM
Replies: 39
Views: 1,052
Posted By quorneng
Bill Congratulations and well done! I...

Bill
Congratulations and well done!

I don't have snow to contend with just wind and rain!
Forum: Scratch and Kit Built Aircraft 02-25-2015, 12:32 PM
Replies: 9
Views: 225
Posted By quorneng
Very nicely done! If it is at all possible try...

Very nicely done!
If it is at all possible try a test glide over really long grass or a even crop.
The plane is now quite a bit heavier than the original so not quite so crash proof for the initial...
Forum: Scratch and Kit Built Aircraft 02-23-2015, 12:58 AM
Replies: 21
Views: 626
Posted By quorneng
The Vampire is now all ready to go. 179640 ...

The Vampire is now all ready to go.
179640
Roundels added.
Inside of the jet pipe painted black
Canopy retained with apeg at the front and a tiny magnet at the rear.
3 balsa stringers added over...
Forum: Scratch and Kit Built Aircraft 02-20-2015, 12:14 PM
Replies: 24
Views: 686
Posted By quorneng
Looks very nice. My own experience with 'wing...

Looks very nice.
My own experience with 'wing plus lifting body fuselage' is it has to be treated almost like a delta. In other words any fuselage lift is not that effective at low AoA but it does...
Forum: Scratch and Kit Built Aircraft 02-20-2015, 01:05 AM
Replies: 21
Views: 626
Posted By quorneng
Nearly there! 179619 The paint has added 0.22...

Nearly there!
179619
The paint has added 0.22 oz (6.2 g) so it now weighs 4.5 oz (127 g) ready to go. This gives a wing loading of exactly 7 oz/sqft which is rather higher than the 4.5 oz/sqft of...
Forum: Scratch and Kit Built Aircraft 02-18-2015, 05:21 PM
Replies: 21
Views: 626
Posted By quorneng
When I started to make the battery hatch I...

When I started to make the battery hatch I realised I had a problem. I had simply made the battery box too small. The battery fitted ok but then of course you have to find somewhere for the...
Forum: Scratch and Kit Built Aircraft 02-17-2015, 12:26 AM
Replies: 21
Views: 626
Posted By quorneng
With the wings covered, apart from the panel over...

With the wings covered, apart from the panel over the radio, the booms can be glued in place.
179594
The radio fully installed and tested.
179595
The radio can now be 'tissued in' - If it need...
Forum: Scratch and Kit Built Aircraft 02-14-2015, 02:26 PM
Replies: 21
Views: 626
Posted By quorneng
With the tail feathers covered and glued in place...

With the tail feathers covered and glued in place the tail booms can be temporarily slotted onto the wing to give the first impression of what it will look like.
179577
The aileron servo just fits...
Forum: Scratch and Kit Built Aircraft 02-12-2015, 12:13 PM
Replies: 21
Views: 626
Posted By quorneng
The booms and tail feathers. 179571 The tiny...

The booms and tail feathers.
179571
The tiny 2.5g servo mounted in the middle of the tailplane.
179572
To give a smooth surface close to the fan slip stream the elevator will be bottom tape...
Forum: Scratch and Kit Built Aircraft 02-12-2015, 12:06 PM
Replies: 39
Views: 1,052
Posted By quorneng
Bill As all ways a very impressive build and a...

Bill
As all ways a very impressive build and a nice bit of covering as well.
Forum: Scratch and Kit Built Aircraft 02-10-2015, 11:18 PM
Replies: 85
Views: 2,358
Posted By quorneng
Cold and damp this morning but almost a flat...

Cold and damp this morning but almost a flat calm.
The modification to the elevator certainly seem to have made a significant difference as it now flies very smoothly even though the 3 axis gyro was...
Forum: Scratch and Kit Built Aircraft 02-10-2015, 12:09 PM
Replies: 21
Views: 626
Posted By quorneng
The wings complete. 179549 The exreme bracing...

The wings complete.
179549
The exreme bracing does look add compared to conventional all balsa construction but it is required to support the edges, adds significant rigidity yet weighs very...
Forum: Scratch and Kit Built Aircraft 02-09-2015, 01:04 AM
Replies: 85
Views: 2,358
Posted By quorneng
Out of interest I have run the Canberra's...

Out of interest I have run the Canberra's dimensions through the calculator and it calculates the current Static Margin is at 7% which although stable is at the low end of the recommended range.
...
Forum: Beginners 02-09-2015, 12:20 AM
Replies: 33
Views: 628
Posted By quorneng
Karnsey The LVC (Low Voltage Cut off) is set by...

Karnsey
The LVC (Low Voltage Cut off) is set by the speed controller (ESC).
It depends on the ESC but conventionally to 3.3V (under load) to reduce power and 3.0V (under load) to actually cut the...
Forum: Scratch and Kit Built Aircraft 02-08-2015, 10:46 PM
Replies: 85
Views: 2,358
Posted By quorneng
The new battery position is now a good 2" (50mm)...

The new battery position is now a good 2" (50mm) further forward than previously.
179545
The battery box is now just a long 'slot' which will have a front hinged cover.
The forward CofG certainly...
Forum: Scratch and Kit Built Aircraft 02-08-2015, 10:11 PM
Replies: 21
Views: 626
Posted By quorneng
The ESC is actually a 'spare' from the original...

The ESC is actually a 'spare' from the original set I used in my Concorde that also used the same 40mm EDF. It is rated at 20A but did get noticeably warm which is why it had the heat shrink removed...
Forum: Scratch and Kit Built Aircraft 02-07-2015, 01:04 PM
Replies: 39
Views: 1,052
Posted By quorneng
Bill Looking good but even with just a 50mm EDF...

Bill
Looking good but even with just a 50mm EDF the scale wing root inlets look ever so small.
Forum: Scratch and Kit Built Aircraft 02-07-2015, 02:33 AM
Replies: 21
Views: 626
Posted By quorneng
As Depron is rather more flexible than balsa the...

As Depron is rather more flexible than balsa the leading and trailing edges need additional support to resist the shrink forces of the tissue.
Rather than gussets I have used diagonal 'braces' in...
Forum: Scratch and Kit Built Aircraft 02-05-2015, 02:29 PM
Replies: 21
Views: 626
Posted By quorneng
The slots for the stringers were cut with a 1/32"...

The slots for the stringers were cut with a 1/32" jewellers diamond file which cuts the Depron very easily. This means the 2x1mm balsa stringers are a 'tight' fit in the soft Depron formers so the...
Forum: Scratch and Kit Built Aircraft 02-04-2015, 01:24 AM
Replies: 85
Views: 2,358
Posted By quorneng
With the tailplane incidence change, the battery...

With the tailplane incidence change, the battery fully forward and a little nose weight it is beginning to perform better but it is still tending to be 'tail heavy' and very sensitive on the...
Forum: Scratch and Kit Built Aircraft 02-02-2015, 10:37 PM
Replies: 21
Views: 626
Posted By quorneng
Very fiddly to do but the inlet duct is complete....

Very fiddly to do but the inlet duct is complete.
179466
Although the duct is of sufficient area its complex path is probably where most of the duct losses will occur.
179467
The next issue was...
Forum: Scratch and Kit Built Aircraft 02-02-2015, 01:29 PM
Replies: 52
Views: 1,658
Posted By quorneng
I would be quite willing to withdrawn one if its...

I would be quite willing to withdrawn one if its a problem.
It is just that the Canberra although unusual for an EDF is built in a similar way to my other Depron jets.
On the other hand the Vampire...
Forum: Scratch and Kit Built Aircraft 02-01-2015, 08:08 PM
Replies: 52
Views: 1,658
Posted By quorneng
As it looks like I should get it finished in time...

As it looks like I should get it finished in time can I add my 25" Vampire to the competition? (As well as the Canberra!)

Hopefully the weather will improve before the end date so I can get videos!
Forum: Scratch and Kit Built Aircraft 02-01-2015, 06:33 PM
Replies: 21
Views: 626
Posted By quorneng
$100 EDF scratch build contest - 25" Vampire

With a bit of luck this could be included in the $100 EDF build. It certainly wont cost that much including everything!
First the fuselage.
With this sort of micro EDF I find it is easiest to build...
Forum: Beginners 02-01-2015, 02:37 AM
Replies: 33
Views: 628
Posted By quorneng
There is nothing stopping you from simply...

There is nothing stopping you from simply resetting your charger and continuing for another 120 minutes.
It might be worth doing this (under supervision) to see if the batteries do ever balance.
If...
Showing results 1 to 30 of 500

 
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