# Airplane Tutorial Videos

**URL:** <https://discourse.shapr3d.com/t/airplane-tutorial-videos/2801>\
**Category:** Modeling Questions\
**Created:** [August 22, 2018, 9:06pm UTC](https://discourse.shapr3d.com/t/airplane-tutorial-videos/2801 "2018-08-22T21:06:23Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![tommyn](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/tommyn/32/1714_2.png) [@tommyn](https://discourse.shapr3d.com/u/tommyn)\
**Post date:** [August 22, 2018, 9:06pm UTC](https://discourse.shapr3d.com/t/airplane-tutorial-videos/2801/1 "2018-08-22T21:06:23Z")

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Kudos on this series… Quite well done and worth watching.

I didn’t understand the words of wisdom re the last and second to last points on a spline curve. He repeated this so I assume this is important so perhaps someone could explain this better for our challenged learners?

From an aircraft design perspective this plane will never take off, fly and land. It needs a horizontal stabilizer, and flight controls: ailerons on wings and rudder and elevators.

![EC44DD0A-0406-4670-9141-31AA00537DEA](https://cdck-file-uploads-us1.s3.dualstack.us-west-2.amazonaws.com/flex002/uploads/shapr3d/original/2X/c/c6db2a6b6b26466cfd50229e0b3c341f05b03bef.jpeg)

Or more unconventionally, a forward wing/canard like this…

![ABF4542F-5769-436E-9628-D1242D510635](https://cdck-file-uploads-us1.s3.dualstack.us-west-2.amazonaws.com/flex002/uploads/shapr3d/original/2X/7/75ec4fb93247dcb8445cb2f77bf73c358577fad7.jpeg)

If the S3D file could be made available, perhaps users would do refinements and additions? Maybe even a contest?

Best,

Tommy

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**Author:** ![DanielR](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/danielr/32/582_2.png) [@DanielR](https://discourse.shapr3d.com/u/DanielR)\
**Post date:** [August 24, 2018, 12:11pm UTC](https://discourse.shapr3d.com/t/airplane-tutorial-videos/2801/2 "2018-08-24T12:11:12Z")

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Yes- it is a concept tutorial - so please don’t produce the plane and fly with it 🙂

As for the question about splines, here are some pics that can help. The idea is to have tangent connection when you mirror/revolve your sketch. Positioning them on the same line (perpencidular to your mirror or revolve axis) helps you do that.

**Without tangency**

![PNG](https://cdck-file-uploads-us1.s3.dualstack.us-west-2.amazonaws.com/flex002/uploads/shapr3d/original/2X/d/d73ef5078c5119bdfa696328eba74e536b2dff57.jpeg) ![PNG](https://cdck-file-uploads-us1.s3.dualstack.us-west-2.amazonaws.com/flex002/uploads/shapr3d/original/2X/5/5f57235bf85e240da2a6937c12e5c76d4e31ff00.jpeg)

**With tangency**

![PNG](https://cdck-file-uploads-us1.s3.dualstack.us-west-2.amazonaws.com/flex002/uploads/shapr3d/original/2X/c/c6bb20993b2ee26540f539418121188e43bcdb62.jpeg) ![PNG](https://cdck-file-uploads-us1.s3.dualstack.us-west-2.amazonaws.com/flex002/uploads/shapr3d/original/2X/2/25afbaccb5c32eedadfe658682d1793d00b83039.jpeg)

Great idea with the model - we might do something like that - thanks