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Search: Posts Made By: quorneng
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04-02-2020, 01:56 PM
Replies: 7
Views: 612
Posted By quorneng

For a "vertical riser" saving weight is key but...

For a "vertical riser" saving weight is key but you are still quite a bit above my rocket which weighed just 695 g ready to go. It had about 850g static thrust available.
The development and build...
04-02-2020, 10:28 AM
Replies: 7
Views: 612
Posted By quorneng

I fear that to produce 4 kg, or even 2.5 kg, of...

I fear that to produce 4 kg, or even 2.5 kg, of thrust within an 8 inch diameter body you would have to use a multi bladed fan. A prop will not create such thrust. Using two 4" (100 mm) diameter side...
Forum: Beginners
04-01-2020, 12:11 PM
Replies: 7
Views: 133
Posted By quorneng

Jimigunne I suspect the problem is with the...

Jimigunne
I suspect the problem is with the helo rather than the router.
2.4 and 5 are normally very clever, testing for and selecting a specific frequency, or even several and hoping between them,...
03-03-2020, 10:14 AM
Replies: 11
Views: 1,266
Posted By quorneng

My AN2 was really built to test the principles of...

My AN2 was really built to test the principles of combining 3D printing and thin Depron sheet into a scale structure that flies well rather than for looks.
Along the way I wanted to test if a full...
03-02-2020, 07:27 PM
Replies: 11
Views: 1,266
Posted By quorneng

Hi Its wing span is 50" (1270 mm). And being...

Hi
Its wing span is 50" (1270 mm).
And being a biplane it takes up rather a lot of room.
A rather poor video of its second ever flight.
https://www.youtube.com/watch?v=A_koMXdAwPg&t=30s
03-01-2020, 12:23 PM
Replies: 11
Views: 1,266
Posted By quorneng

10 lb Nylon mono filament line is used for the...

10 lb Nylon mono filament line is used for the bracing wires.
This is normally considered 'stretchy' but as each line is capable of lifting 5 times the all up weight of the AN2 the degree of stretch...
02-26-2020, 03:45 PM
Replies: 2
Views: 308
Posted By quorneng

Truly spectacular scale detail and it flies well...

Truly spectacular scale detail and it flies well too!
But the title should be float plane not flying boat.;)
02-24-2020, 09:24 PM
Replies: 11
Views: 1,266
Posted By quorneng

As the wings are a constant chord I decided to...

As the wings are a constant chord I decided to use 3D printed ribs.
187878
Although the wing section is the same the ribs are cut off at different lengths to account for the flaps and ailerons...
02-23-2020, 09:13 PM
Replies: 3
Views: 304
Posted By quorneng

Quite remarkable and it flies really well.

Quite remarkable and it flies really well.
02-18-2020, 07:14 PM
Replies: 3
Views: 390
Posted By quorneng

Wildflyer That wing construction looks...

Wildflyer
That wing construction looks extremely scale.
What are the main cross braces made of? What ever they are made of it gives a very good impression of wire bracing.
02-17-2020, 11:35 PM
Replies: 11
Views: 1,266
Posted By quorneng

The next stage is the fin and tail plane. ...

The next stage is the fin and tail plane.
Simple symmetrical camber structures using 2 mm Depron skins.
187871
The tail plane brace is Depron but it has balsa leading and trailing edges for...
02-09-2020, 03:13 PM
Replies: 7
Views: 612
Posted By quorneng

Shantz It would help if you describe what the 4...

Shantz
It would help if you describe what the 4 kg of thrust is for and how it is to be used in VTOL For instance one motor or many?
All VTOL requires specific control and stability features that...
02-08-2020, 12:22 AM
Replies: 11
Views: 1,266
Posted By quorneng

The AN 2 undercarriage is supported by a stub...

The AN 2 undercarriage is supported by a stub centre section of the lower wing which is braced by a strut to a specific fuselage former. It was obvious to simply include this in the former printing....
02-01-2020, 11:39 AM
Replies: 11
Views: 1,266
Posted By quorneng

Don Thanks. The 9 cylinder is virtually a kit...

Don
Thanks. The 9 cylinder is virtually a kit of printed parts. 7 bits make up each cylinder ending up with over 70 in all but it does give the lightest and finest detail end result.
The cowling in...
01-29-2020, 09:34 PM
Replies: 11
Views: 1,266
Posted By quorneng

Antonov AN 2 in Depron with 3d printing.

When I first got my 3D printer I played around trying to create a fairly detailed 9 cylinder radial with a brushless out runner enclosed within the crankcase
Now after a couple of years learning how...
Forum: Beginners
01-29-2020, 01:21 PM
Replies: 28
Views: 11,155
Posted By quorneng

Jools Wow! I will let the content of your...

Jools
Wow!
I will let the content of your reply speak for itself.
Forum: Beginners
01-29-2020, 10:56 AM
Replies: 28
Views: 11,155
Posted By quorneng

Jools In a turn as you describe the rudder...

Jools
In a turn as you describe the rudder creates yaw (which is not a turn) and you are relying on the wing dihedral to cause the bank that actually creates the constant turn. Until such time as...
Forum: Beginners
01-28-2020, 11:36 PM
Replies: 28
Views: 11,155
Posted By quorneng

My own view is that it is not ailerons that is...

My own view is that it is not ailerons that is the issue but the rudder.
You do not steer a plane in flight with the rudder but only use it to apply a 'correction'. From the ground it is difficult...
Forum: Beginners
01-27-2020, 12:04 AM
Replies: 3
Views: 536
Posted By quorneng

dasintex There is a school of thought that says...

dasintex
There is a school of thought that says connecting a battery to any motor with a prop is potentially dangerous so the only truly safe electric plane is one where the flight battery is...
01-23-2020, 03:42 PM
Replies: 15
Views: 1,070
Posted By quorneng

dasintex Not really, unless you want to stop...

dasintex
Not really, unless you want to stop one in flight on purpose! I did on my Cessna Skymaster. ;)
More likely reason is if you fit floats on your Twin Otter then individual throttle control...
01-23-2020, 12:34 PM
Replies: 15
Views: 1,070
Posted By quorneng

dasintex Correct It is a good idea to extract...

dasintex
Correct
It is a good idea to extract and tape off one of the red pins as shown in the earlier post. It means it is then simple to re use the ESC in a single engine job later if the worst...
01-23-2020, 10:46 AM
Replies: 15
Views: 1,070
Posted By quorneng

dasintex The need to remove the red wire...

dasintex
The need to remove the red wire connection on one ESC depends on the type of the battery eliminator circuit (BEC) in the ESC.
If is is a linear BEC (it simply maintains a constant voltage...
01-22-2020, 10:20 AM
Replies: 5
Views: 912
Posted By quorneng

dasintex Correct again. Measuring the amps...

dasintex
Correct again.
Measuring the amps before the Y lead gives you the maximum current that is drawn from the battery. As a very rough guide for a prop plane it is wise to keep the max amps to...
01-22-2020, 01:08 AM
Replies: 5
Views: 912
Posted By quorneng

dasintex That is exactly the type of Watt meter...

dasintex
That is exactly the type of Watt meter you will need. The maximum amps capability you need does depend on the size of the electric motor(s) in your plane but that particular one should more...
01-19-2020, 09:44 PM
Replies: 4
Views: 212
Posted By quorneng

dasintex No its the other way round. kV means...

dasintex
No its the other way round.
kV means the motor revs per volt applied so a 950 kV motor will turn off load at battery volts x 950. For example with a 3s LiPo that would be 11.1 x 950 =...
01-18-2020, 11:23 PM
Replies: 10
Views: 1,462
Posted By quorneng

Posted in error

Posted in error
01-15-2020, 10:11 PM
Replies: 3
Views: 931
Posted By quorneng

If both steel and carbon are supplied I would be...

If both steel and carbon are supplied I would be amazed if the assembly instructions did not explain why they are there.
I understand the Timber battery space is pretty restricted so a steel rod...
01-08-2020, 11:47 PM
Replies: 7
Views: 2,101
Posted By quorneng

foxch0844 Chellie's recommendation look good. ...

foxch0844
Chellie's recommendation look good.
The Berkley Fairchild 24 has a light weight construction (5.8 oz complete incl the rubber motor!) so it is best to keep the weight as an electric RC...
01-04-2020, 01:06 PM
Replies: 41
Views: 2,642
Posted By quorneng

Madspadder "Took most of the dihedral out of...

Madspadder
"Took most of the dihedral out of the wings...."
Of course the full size had no dihedral at all. Its 'tip to tip' box spars were built in one piece.
01-01-2020, 04:37 PM
Replies: 5
Views: 750
Posted By quorneng

Whether its folding prop or not if you want an...

Whether its folding prop or not if you want an electric motor to stop at a particular position it will require some sort of mechanical stop.
Most model powered gliders have a slim and almost...
Showing results 1 to 30 of 500
 


 
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