9000 Sq. Ft. House Design for Sale

7x bedrooms, 8x bathrooms, 2x Living Room, 2x Kitchen, 1x Drawing & Dining, Porch for 4x cars, 1x Servant area, 2x terraces, 2 lawns.

If you need the CAD files or want to buy the design for commercial (Building, and selling) use contact via this account or mail to fadoobaba@live.com

 Front View

 Right View

 Top View

Isometric View

Dinner Table Design for Sale

8.75 ft. in dia. 2.5 ft. high, chairs 12, 1.625 ft. diameter, 1.5 ft. high.

If you need the CAD files or want to buy the design for commercial (Building, and selling) use, contact via this account or mail to fadoobaba@live.com

Comparison between Down-Force and Drag Produced by a Legacy Spoiler VS a Spoiler with Tubercles (Humpback Whale Fin's Inspired)

Following data was obtained from Simulations carried out in SolidWorks Flow Simulation Premium.

Without Bumps
Air Speed in Km/h	Down Force in N	Drag in N
120	98.682	33.234
110	82.88	27.957
100	68.266	23.02
90	55.299	18.668
80	43.529	14.697
70	33.284	11.255
60	24.438	8.272
50	16.982	5.769
40	10.83	3.688
30	6.08	2.081
20	2.681	0.929
10	0.648	0.235

With Bumps
Air Speed in Km/h	Down Force in N	Drag in N
120	108.238	30.47
110	90.599	25.549
100	74.818	21.047
90	60.423	17.014
80	47.695	13.443
70	36.441	10.27
60	26.682	7.532
50	18.504	5.228
40	11.82	3.352
30	6.613	1.886
20	2.909	0.841
10	0.685	0.211

Comparison between Down Force and Drag

Air Speed in Km/h	Percentage Less Drag		Percentage More Down Force
120	8.32		8.83
110	8.61		8.51
100	8.57		8.76
90	8.86		8.48
80	8.53		8.73
70	8.75		8.66
60	8.95		8.41
50	9.38		8.23
40	9.11		8.38
30	9.37		8.06
20	9.47		7.84
10	10.21		5.4

It is clear that the spoiler with humpback whale's fin's inspired profile not only produce more down force at a particular velocity but also less drag.

Data for Spoiler without Humpback Whale's Fin's Inspired Bumps:

Wing Span: 100 cm

Chord Length: 17.5 cm

Air Velocity: 0-120 Km/h head on

Vertical Pitch: 22.5 Degree Downwards

Gravity Considered

Fluid: Dry Air at STP

Mesh Settings: Coarse (3/10)

Data for Spoiler with Humpback Whale's Fin's Bumps:

Wing Span: 100 cm

Chord Length Large: 17.5 cm

Chord Length Small: 15.75 cm

Air Velocity: 0-120 Km/h head on

Vertical Pitch: 22.5 Degree Downwards

Gravity Considered

Fluid: Dry Air at STP

Mesh Settings: Coarse (3/10)

Let's now take a look at visual representation of data.

This Plot Shows Air Velocity VS Drag, Down-Force by the Spoiler without Bumps

This Plot Shows Air Velocity VS Drag, Down-Force by the Spoiler with Bumps

As you can see from above two plots; the spoiler with the whale's fin like profile generates more down force and less drag.

This Plot Shows Air Velocity VS Down-Force Generated by the Spoilers

The green line represents the Down-Force generated by the spoiler with whale's fin's inspired design. It is around eight percent more at each velocity.

This Plot Shows Air Velocity VS Drag Generated by the Spoilers

The green line represents the Drag generated by the spoiler with whale's fin inspired design. It is around nine percent less at each velocity.

This Plot Shows Air velocity VS Down-Force to Drag Ratio

It is clear from this plot that Down-Force to Drag ratio is around sixteen percent more for whale's fin's inspired spoiler than the legacy one at each velocity.

This Plot Shows Air Flow Around the Spoiler without Bumps at 120 Km/h from the Right Side.

This Plot Shows Air Flow Around the Spoiler without Bumps at 120 Km/h.

This Plot Shows Air Flow Around the Spoiler with bumps at 120 Km/h.

This plot Shows Air Flow Around the Spoiler with bumps at 120 Km/h.

A simple stress analysis was carried out on both spoilers at 120 Km/h. FOS was greater than 1 for both cases.

Advantages of Spoilers:

The main benefit of installing a spoiler on a car is to help it maintain traction at very high speeds. Particularly at speeds around 90 Km/h. A car with a spoiler installed will be easier to handle at highway speeds. Rear spoilers such as the one's analysed in this study; push the back of the car down so the tires can grip the road better and increase stability. It also increases the braking ability of the car.

To build the prototypes and complete the study further, I need donations. To donate your part send an email to fadoobaba@live.com , tweet @fadoobaba, PM at https://www.facebook.com/ThreeDimensionalDesign orhttps://grabcad.com/fahad.rafi.butt or comment with your contact details and I will contact you!. Thank you for reading!

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Fully Define the Sketch

some tips regarding good sketching practices.

Every part should have sketch(s) that is fully defined and extremely easy to edit, always remember, at school no one will read your sketch, not even the professors for grading, but in CAD, especially CAM firms other engineers and technicians will need your sketch to be as clear as possible and as much easy to edit as possible.

Use relations and construction lines, instead of dimensions where ever possible, NEVER link part sketch(s) to external (other) parts in an assembly; it is considered a very bad practice everywhere! Because if someone goes in and changes the "external" part, the original part changes due to this, which messes up the whole assembly.

Fully defining a sketch, it is always easy to just whack dimensions everywhere, but fully defining properly takes a lot of time which means a lot more money to the client to pay but stick with it, remember it is you who have to modify it later if needed, make a fully defined sketch now and save the trouble later.

The only way you would not fully define a sketch was if you are doing "recreational" modeling or something. In real work always define the sketch. It is a nightmare to make changes (for others) to parts that were created by you by using sketches that were not always fully defined. Being able to edit by another engineer should be a high priority.

Minimize the use of 3D sketches.