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PeterS · 09-18-2011, 06:05 AM

http://pic40.picturetrail.com/VOL282.../398090017.jpg

Hi Grant , thanks for the tips .I'm unsure about the practicality of an inverted NASA wing shape ... could you link to something like that ? I can't visualise it .I was planning a up curve on the underside of the fairing .... is that what you mean?

I was planning to use winglets to offer it bit of downforce .I wonder if they would be sufficient ?

''The nose cross-section should be as rounded as possible to reduce the Cd and area exposed to cross wind forces. Angle of attack of the body should be at negative 3 degrees''.
Could you clarify that ? The rounded nose is self explanatory but not the 3 degree angle of attack.Sorry ,but this field is rather new to me and the learning curve is steep .I find stuff online but the difficulty is understanding it !

I've found some very good sound deadening foam used in the marine industry .It appears very good ,so I'm planning a double layer of that inside a fiberglass nacelle .The engine is a standard 10 hp stationary with forced air through it's shell .It should be OK as long as there is a path for air in and out .A digital pyrometer might be a good idea, especially as I have a spare one ,I'd hate to cook an engine .

I'm hoping for 185 mpg US at 50 mph,a top speed of 70mph,not up to Allert's standards but still good .

For that I need a cD of .45 .I wonder if that is possible?

All and any advice is very welcome !

09-18-2011, 06:05 AM	#43 (permalink)
PeterS Master EcoModder Join Date: Aug 2011 Location: East coast of Australia Posts: 393 Yella Peril - '80 Mercedes 240D sedan Thanks: 15 Thanked 41 Times in 17 Posts	http://pic40.picturetrail.com/VOL282.../398090017.jpg Hi Grant , thanks for the tips .I'm unsure about the practicality of an inverted NASA wing shape ... could you link to something like that ? I can't visualise it .I was planning a up curve on the underside of the fairing .... is that what you mean? I was planning to use winglets to offer it bit of downforce .I wonder if they would be sufficient ? ''The nose cross-section should be as rounded as possible to reduce the Cd and area exposed to cross wind forces. Angle of attack of the body should be at negative 3 degrees''. Could you clarify that ? The rounded nose is self explanatory but not the 3 degree angle of attack.Sorry ,but this field is rather new to me and the learning curve is steep .I find stuff online but the difficulty is understanding it ! I've found some very good sound deadening foam used in the marine industry .It appears very good ,so I'm planning a double layer of that inside a fiberglass nacelle .The engine is a standard 10 hp stationary with forced air through it's shell .It should be OK as long as there is a path for air in and out .A digital pyrometer might be a good idea, especially as I have a spare one ,I'd hate to cook an engine . I'm hoping for 185 mpg US at 50 mph,a top speed of 70mph,not up to Allert's standards but still good . For that I need a cD of .45 .I wonder if that is possible? All and any advice is very welcome !