JLS
10-05-2019, 12:12 PM
I discovered Westfall negative stagger biplane in Sport Aviation of october
and found that this cabin biplane was great, I couldn't resist to draw a
microlight-LSA variant with a VW 2180 70HP engine
I took same dimension gap 46" and chord 42".
Here are some thoughts concerning the biplane with positive and negative
loads.
flying wires
https://drive.google.com/file/d/15HSP3LKcVwhp2J6ajsIfnksALD8UgVmZ/view?usp=sharing
landing wires
https://drive.google.com/file/d/1qHRRKsQ1UXKwz8TJh_e2FnmQNmuz4clc/view?usp=sharing
some specs
https://docs.google.com/spreadsheets/d/1Q5j_moyv4i5OpSN-Ki_31X8chbFfsTNGCMe_gIIM83M/edit?usp=sharing
munk factor
https://drive.google.com/file/d/1UzDYiX0sOilPirpzGrBT3dXoIOkh67hE/view?usp=sharing
50 ft clearance
https://drive.google.com/file/d/1bawPV4MmX7W0aX9IRL9Yxlh_ie05mCrC/view?usp=sharing
Take Off ground roll
https://docs.google.com/spreadsheets/d/1xDS-VIWSbqKBYsyOdLhVY2_df1qN_0NJwgCo2ymyH_k/edit?usp=sharing
Figures could be divided by 2 with a reducted Rotax engine. Static thrust of VW2180 76HP
is given by Great Plains builder manual 247lbs that is quite anemic.
Upper spar of cabin to support wing rear upper spar (cantilever)
https://drive.google.com/file/d/1JlOiU_h67Zu1ZWz2rdJhRqQj-iE6Tjc8/view?usp=sharing
Upper spar with fixed end moments
https://drive.google.com/file/d/1BrRtoFC-XNvQJRuCWuc34dmIjQCLApit/view?usp=sharing
(https://drive.google.com/file/d/1BrRtoFC-XNvQJRuCWuc34dmIjQCLApit/view?usp=sharing)High Definition (300dpi) PNG side view
https://drive.google.com/file/d/1_psutmCNe00qA8vrN3enLOKpsuai6bIa/view?usp=sharing
8083
P.S : I use english and french, but in the latter case I think that drawing would help even if you don't know french.
This post "Westfall negative stagger biplane" is for educational purposes only and may contain errors. Any attempt
to use the results for actual design purposes are done at the user's own risk.
and found that this cabin biplane was great, I couldn't resist to draw a
microlight-LSA variant with a VW 2180 70HP engine
I took same dimension gap 46" and chord 42".
Here are some thoughts concerning the biplane with positive and negative
loads.
flying wires
https://drive.google.com/file/d/15HSP3LKcVwhp2J6ajsIfnksALD8UgVmZ/view?usp=sharing
landing wires
https://drive.google.com/file/d/1qHRRKsQ1UXKwz8TJh_e2FnmQNmuz4clc/view?usp=sharing
some specs
https://docs.google.com/spreadsheets/d/1Q5j_moyv4i5OpSN-Ki_31X8chbFfsTNGCMe_gIIM83M/edit?usp=sharing
munk factor
https://drive.google.com/file/d/1UzDYiX0sOilPirpzGrBT3dXoIOkh67hE/view?usp=sharing
50 ft clearance
https://drive.google.com/file/d/1bawPV4MmX7W0aX9IRL9Yxlh_ie05mCrC/view?usp=sharing
Take Off ground roll
https://docs.google.com/spreadsheets/d/1xDS-VIWSbqKBYsyOdLhVY2_df1qN_0NJwgCo2ymyH_k/edit?usp=sharing
Figures could be divided by 2 with a reducted Rotax engine. Static thrust of VW2180 76HP
is given by Great Plains builder manual 247lbs that is quite anemic.
Upper spar of cabin to support wing rear upper spar (cantilever)
https://drive.google.com/file/d/1JlOiU_h67Zu1ZWz2rdJhRqQj-iE6Tjc8/view?usp=sharing
Upper spar with fixed end moments
https://drive.google.com/file/d/1BrRtoFC-XNvQJRuCWuc34dmIjQCLApit/view?usp=sharing
(https://drive.google.com/file/d/1BrRtoFC-XNvQJRuCWuc34dmIjQCLApit/view?usp=sharing)High Definition (300dpi) PNG side view
https://drive.google.com/file/d/1_psutmCNe00qA8vrN3enLOKpsuai6bIa/view?usp=sharing
8083
P.S : I use english and french, but in the latter case I think that drawing would help even if you don't know french.
This post "Westfall negative stagger biplane" is for educational purposes only and may contain errors. Any attempt
to use the results for actual design purposes are done at the user's own risk.