Search: Posts Made By: quorneng
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Forum: Power Systems
Yesterday, 04:13 PM
Replies: 6
Views: 192
Posted By quorneng

sportflyer The reason for a throttle response...

sportflyer
The reason for a throttle response curve is more of a safety feature than a necessity. An electric motor will produce a torque then is more or less proportional to the throttle position...
Forum: 3D Flying
09-18-2019, 09:59 AM
Replies: 3
Views: 177
Posted By quorneng

Indeed! Identical versions of this have been...

Indeed!
Identical versions of this have been posted on several other model plane web sites.
Forum: Beginners
08-30-2019, 05:18 PM
Replies: 7
Views: 1,009
Posted By quorneng

Bobbyra Depending on exactly what you mean...

Bobbyra
Depending on exactly what you mean there can be reasons why you would wish to fly at reduced throttle.
1. It is always useful to have a significant power 'reserve', for instance to ensure...
Forum: Foamies
08-28-2019, 07:40 PM
Replies: 64
Views: 4,711
Posted By quorneng

Bear in mind that how a plane flies is not only...

Bear in mind that how a plane flies is not only effected by the CofG but also the angle of incidence of the tail plane relative to the wing. It is normally set at a small negative angle to the true...
Forum: Foamies
08-25-2019, 02:18 PM
Replies: 64
Views: 4,711
Posted By quorneng

Well done! To me that maiden flight looked fine...

Well done!
To me that maiden flight looked fine given it is a home design! Was there much damage?
There are many things you have to get right for a plane to fly well, including the skill of the...
08-22-2019, 01:38 AM
Replies: 15
Views: 1,884
Posted By quorneng

Not sure I agree that batteries do not loos...

Not sure I agree that batteries do not loos capacity with age.
My 6 year old 5000 mAh 2s is still usable in a low current application but when charged to full (4.2 v/cell) from .storage level (3.8...
08-19-2019, 12:20 AM
Replies: 3
Views: 567
Posted By quorneng

Solentlife Sir Sydney Camm would be turning in...

Solentlife
Sir Sydney Camm would be turning in his grave at the shape of that elevator on a Hunter!

IMHO it will depend to a degree on what shape CF you intend to put in.
If a tube (good in...
Forum: Foamies
08-17-2019, 03:56 PM
Replies: 64
Views: 4,711
Posted By quorneng

Good load test! What made you decide to cut...

Good load test!
What made you decide to cut down the prop? At 11 inch was it drawing to many amps for the speed controller?
A 11 inch prop cut down to 9 is not quite as efficient as a true 9 if...
08-11-2019, 10:18 PM
Replies: 15
Views: 664
Posted By quorneng

Does indeed look good in the air - well done..

Does indeed look good in the air - well done..
08-07-2019, 08:18 PM
Replies: 14
Views: 2,324
Posted By quorneng

My own view is that a 3m glider will always be...

My own view is that a 3m glider will always be slow to turn on rudder only unless it has plenty of dihedral and a big rudder.
With modern small light servos there is no technical reason why ailerons...
08-04-2019, 10:53 AM
Replies: 2
Views: 1,800
Posted By quorneng

A Desoutter MK 1. Originally a French design but...

A Desoutter MK 1. Originally a French design but built in some numbers under licence at Croyden Airodrome in the late 1920 early 1930.
G-AAPZ is operated by the Shuttleworth Trust and uses a Cirrus...
Forum: Foamies
08-02-2019, 02:37 PM
Replies: 64
Views: 4,711
Posted By quorneng

That looks very neat although I doubt you will...

That looks very neat although I doubt you will really need the flaps.

If I was doing it I would have used just 3 servo (ailerons and elevator) rather than 6 and placed the elevator servo right at...
Forum: Foamies
08-02-2019, 02:30 PM
Replies: 64
Views: 4,711
Posted By quorneng

That looks very neat. I do wonder if you will...

That looks very neat.
I do wonder if you will ever actually need flaps other that to play with to see what happens.

ff I was doing it i would have kept it simple and used just 3 servos (ailerons...
07-29-2019, 12:28 PM
Replies: 7
Views: 6,294
Posted By quorneng

I do accept that not everyone likes or wants to...

I do accept that not everyone likes or wants to build using non traditional materials but particularly at smaller sizes "foams" can lead to a lighter air frame thus for a given size it allows more...
Forum: Foamies
07-23-2019, 09:04 PM
Replies: 64
Views: 4,711
Posted By quorneng

aaindthu You can run the cables through a guide...

aaindthu
You can run the cables through a guide tube but the servo and control horn should still be in the same plane or fairly close to it.
What is important is that when the servo is deflected...
Forum: Foamies
07-23-2019, 03:12 PM
Replies: 64
Views: 4,711
Posted By quorneng

aaindthu The tail, and the rest of the plane!,...

aaindthu
The tail, and the rest of the plane!, is indeed foam - actually Depron.
It has no under carriage so is always belly landed.
Note the tail plane is fixed to the top of the fuselage so the...
Forum: Foamies
07-23-2019, 09:42 AM
Replies: 64
Views: 4,711
Posted By quorneng

aaindthu That sounds reasonable for a 2.1M span...

aaindthu
That sounds reasonable for a 2.1M span glider.
Will reinforcement to the wing be required?
The success of your design is going to depend on how well you can add strength to the critical...
Forum: Foamies
07-22-2019, 09:36 AM
Replies: 64
Views: 4,711
Posted By quorneng

That looks very "professional". With no servos...

That looks very "professional".
With no servos or electrics how much does it weigh ?
High density foam may be stiffer/stronger but with the extra weight it will also crash a bit harder too!

.
07-17-2019, 09:02 AM
Replies: 9
Views: 4,799
Posted By quorneng

Very true. Of course if you want a real...

Very true.
Of course if you want a real challenge try making a DR1 with a scale nose length and then throw in a true scale prop as well! :eek:
07-16-2019, 04:39 PM
Replies: 9
Views: 4,799
Posted By quorneng

Solentlife Well done with you maidens!

Solentlife
Well done with you maidens!
Forum: Foamies
07-16-2019, 01:05 PM
Replies: 64
Views: 4,711
Posted By quorneng

aaindthu You will have to decide if your glider...

aaindthu
You will have to decide if your glider is worth saving.
What is the kV of your 2212 motor?
The lowest kV version I can find is 1000kV and an 11 inch (is it 11x6?) prop is rather too big...
Forum: Foamies
07-15-2019, 10:45 AM
Replies: 64
Views: 4,711
Posted By quorneng

aaindthu If it becomes uncontrollable as soon...

aaindthu
If it becomes uncontrollable as soon as thrust is applied I would suspect wing flexing coupled with motor torque is the problem. To do this just because of a thrust line issue it would have...
Forum: Foamies
07-10-2019, 11:38 AM
Replies: 64
Views: 4,711
Posted By quorneng

aaindthu You may well be right. Within...

aaindthu
You may well be right.

Within certain limits the incidence of the wing to the airflow determines the speed at which the wing generates sufficient lift to carry the weight of the plane....
Forum: Foamies
07-09-2019, 12:54 AM
Replies: 64
Views: 4,711
Posted By quorneng

aaindthu Are you sure what is happening is just...

aaindthu
Are you sure what is happening is just down to the angle of incidence?
Could also be related to the position of the centre of gravity.
Or even some unwanted flexibility some where.
...
Forum: Foamies
06-24-2019, 12:26 AM
Replies: 64
Views: 4,711
Posted By quorneng

aaingthu That looks quite impressive. Adding...

aaingthu
That looks quite impressive.
Adding wing span and reducing the fuselage tail length at the same time can lead to handling issues. How significant will rather depend on how much 'reserve'...
Forum: Foamies
06-17-2019, 12:05 AM
Replies: 64
Views: 4,711
Posted By quorneng

aaindthu Your wing load test looks quite...

aaindthu
Your wing load test looks quite adequate to me and should allow gentle aerobatics.
There is nothing wrong with "adjusting" the length of the fuselage, within reason, to get a suitable CofG...
Forum: Foamies
06-05-2019, 03:10 PM
Replies: 64
Views: 4,711
Posted By quorneng

Those proportions certainly look reasonable. T...

Those proportions certainly look reasonable.
T tails are popular in full size gliders (keeps the tail plane clear of long grass/crops when landing in a field) but can be a bit delicate in models as...
Forum: Foamies
05-21-2019, 04:39 PM
Replies: 64
Views: 4,711
Posted By quorneng

I look forward to some pictures. If you really...

I look forward to some pictures.
If you really do achieve 300 g for a 2 m span wing it will indeed be pretty light.
I hope it proves strong enough to survive more than one flight! ;) .
Forum: Foamies
05-20-2019, 11:18 AM
Replies: 64
Views: 4,711
Posted By quorneng

aaindthu With that sort of location I think you...

aaindthu
With that sort of location I think you are quite correct to keep the weight, and thus the flying speed, as low as you can, particularly as that type of "mound".hill will not produce the...
Forum: Foamies
05-11-2019, 08:21 PM
Replies: 64
Views: 4,711
Posted By quorneng

aaindthu The nearest 2m solid foam wing powered...

aaindthu
The nearest 2m solid foam wing powered glider I have is an ST330.
187469
The wings including a pair of aileron servos and an aluminium joining tube weigh 340 g.
At 240 g for your basic...
Showing results 1 to 30 of 500
 


 
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