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Search: Posts Made By: allanflowers
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10-01-2020, 03:15 PM
Replies: 42
Views: 4,019
Posted By allanflowers

The model is coming along but at a stage where...

The model is coming along but at a stage where laser cutting files are created. Copying a bunch of parts with polylines doesn't make for very good pictures. I will post as soon as I get something...
Forum: Aerodynamics
10-01-2020, 02:38 PM
Replies: 51
Views: 1,776
Posted By allanflowers

As for what is “correct”, that is debatable. I...

As for what is “correct”, that is debatable. I would not agree.

So WHERE are you finding any spelling errors in my posts? Or is this just another example of your argumentative manner and sloppy...
Forum: Aerodynamics
10-01-2020, 12:36 PM
Replies: 51
Views: 1,776
Posted By allanflowers

“Scale Speed” is apparently a term that invites...

“Scale Speed” is apparently a term that invites differing interpretations.

If one is talking about the impression – that ‘looks’ realistic – then one should probably start with the mathematical...
Forum: Aerodynamics
09-29-2020, 07:22 PM
Replies: 51
Views: 1,776
Posted By allanflowers

The idea of "scale time" is rediculous. The math...

The idea of "scale time" is rediculous. The math clearly calls for 125mph.
09-27-2020, 07:49 AM
Replies: 105
Views: 5,442
Posted By allanflowers

What happened with the new issue of Model...

What happened with the new issue of Model Aviation??
Usually it is good for about 20 minutes then into the trash. This issue is actually a keeper, with many good articles - some good 'build'...
09-26-2020, 10:39 AM
Replies: 42
Views: 4,019
Posted By allanflowers

Good points. I did work in that little feature...

Good points.
I did work in that little feature at the side of the scoop (additional balsa) making the thickness there larger for the sake of a better radius. I generally don't show radii on my...
09-23-2020, 03:36 PM
Replies: 100
Views: 17,599
Posted By allanflowers

Really outstanding build!

Really outstanding build!
Forum: Aerodynamics
09-22-2020, 09:04 AM
Replies: 2
Views: 279
Posted By allanflowers

That's an excellent point. I too have had one...

That's an excellent point. I too have had one retract stay up and no problem - until the actual landing of course.
09-20-2020, 01:35 PM
Replies: 42
Views: 4,019
Posted By allanflowers

The nose gear is another issue, with less...

The nose gear is another issue, with less possibility of avoiding an additional servo by using a mechanical solution.
I am looking at hinging the door on one side, which would be simpler than...
Forum: Aerodynamics
09-20-2020, 01:06 PM
Replies: 2
Views: 279
Posted By allanflowers

Asymmetric landing gear doors

I am considering a design which has the nose gear door operating from one side. It will probably also have an LED landing light on it.
Is there a chance that, in close proximity to the nose gear, it...
09-17-2020, 11:26 AM
Replies: 42
Views: 4,019
Posted By allanflowers

Another pix on this issue. The kicker bar has...

Another pix on this issue. The kicker bar has been relocated and redesigned. The other wire is for a rubberband to pull the door open (unless the gear is up).
...
09-16-2020, 01:21 PM
Replies: 42
Views: 4,019
Posted By allanflowers

As I try to wrap up the wing components, I am...

As I try to wrap up the wing components, I am revisiting the inner main landing gear doors, trying to specifically work out solutions. Modeling it in cad is easier than actually making it.
...
09-16-2020, 08:29 AM
Replies: 42
Views: 4,019
Posted By allanflowers

I finally figured out how to "projection map" my...

I finally figured out how to "projection map" my tail artwork onto the fin and rudder. I used to do this kind of CAD thing years ago but never really quite got it down.
Not a big deal for this kind...
09-15-2020, 12:09 PM
Replies: 42
Views: 4,019
Posted By allanflowers

In looking at the wingtip design, I think a new...

In looking at the wingtip design, I think a new approach is worth considering. I don't know about the aerodynamic function but this looks a lot better to me. The dihedral effect has to be better for...
09-14-2020, 09:41 AM
Replies: 42
Views: 4,019
Posted By allanflowers

The ribs could be balsa or liteply but I am...

The ribs could be balsa or liteply but I am leaning toward the latter. Many of them have point loads requiring some strength and I hate to mix balsa and liteply ribs (complicates the laser cuttting)....
09-14-2020, 09:32 AM
Replies: 42
Views: 4,019
Posted By allanflowers

More work on the rib details. In this case the...

More work on the rib details. In this case the wing servo mounts are done (would be probably 1/4" ply). The servos would be epoxied to aluminum plates and the units screwed to the plywood....
09-13-2020, 11:03 AM
Replies: 42
Views: 4,019
Posted By allanflowers

This picture is of the wing build fixture, a...

This picture is of the wing build fixture, a 3/4"x15"x60" plywood panel. I will screw this to my bench, leveled out as much as possible. The other pieces consist of the elements which locate the...
09-11-2020, 12:07 PM
Replies: 42
Views: 4,019
Posted By allanflowers

This is the internal structure of the flap, with...

This is the internal structure of the flap, with the 6 ribs and lateral parts. It is all modeled and articulates properly.
The mounting surfaces for the landing gear are next and have been brought...
09-10-2020, 03:46 PM
Replies: 42
Views: 4,019
Posted By allanflowers

I have discovered that the leads from the speed...

I have discovered that the leads from the speed controller to its power plug are too short to reach the battery on this design. I will have to use a 6” extension (probably not the best solution). I...
09-08-2020, 11:44 AM
Replies: 42
Views: 4,019
Posted By allanflowers

This is a pix of the wing as it stands now. I...

This is a pix of the wing as it stands now. I have reconfigured all the lasercut sheets to allow for the kerf, intersected the ribs and cross members - making slots for assembly. The ribs will...
09-06-2020, 02:39 PM
Replies: 42
Views: 4,019
Posted By allanflowers

Most of this wing was modeled a couple of years...

Most of this wing was modeled a couple of years ago and I am redoing a lot of it. Rather than compensating for the laser cutting "kerf" at the last stages when setting up the polylines on flat...
09-04-2020, 12:06 PM
Replies: 42
Views: 4,019
Posted By allanflowers

I am bouncing around on components as I think...

I am bouncing around on components as I think about building this model. The wing is a big project in itself and requires a lot of conditions to be right before plunging ahead. This file shows a...
08-31-2020, 02:22 PM
Replies: 42
Views: 4,019
Posted By allanflowers

Moving on with more fuselage work. First is...

Moving on with more fuselage work. First is adapting the sides to the fuselage rear parts, then adding the front "pod" and beginning to create the tabs & slots between those elements.
All the...
08-30-2020, 01:15 PM
Replies: 42
Views: 4,019
Posted By allanflowers

Working ahead to the rear fuselage skins,...

Working ahead to the rear fuselage skins, creating trim lines to take a little weight out and make slots for those tabs.

...
08-29-2020, 11:23 AM
Replies: 42
Views: 4,019
Posted By allanflowers

I have reduced the forward surfaces to poly lines...

I have reduced the forward surfaces to poly lines and am onto the rear fuselage. Here are the formers in that area which have been recreated with tabs. Slots are yet to do. These formers are the...
Showing results 1 to 25 of 500
 


 
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