NACA 66 Special A/BGS

[robfrey]

Very nice work, coming along nicely.

Does the rear front wheel come into the bulkhead recess?


Jon

yes, it does come into the recess.

[robfrey]

What gauge or thickness steel should we use in the seat area?

[robfrey]

Bottom is 1/4" mild steel.

[SPARKY]

rob my seat bottom is 1/4" steel but my skin is alum tank skin.

[robfrey]

I was thinking on plating the rest if the area in with 3/32 steel plate. I can't find a minimum in the rule book.

[SPARKY]

Rob what I was told several years ago where your but is as close to the ground as ours are the want to see some thickness either in the car bottom or in the seat bottom--my car has 1/4" plate welded to the lower frame rail in the drivers compartment---if you have a solid plate bottom I sure you will be fine----but I would check with the special construction guys or KIWI Steve or Kennedy!

[robfrey]

Got an email into Kiwi Steve. Ill let you know what the outcome is.

[Stainless1]

The requirement is for an inner liner, you are not allowed to sit on the skin or only have the tubes and outer skin to protect your limbs.  The safest way to do that is welded or fastened inner panels in the cockpit area.  It not only keeps your parts in, it keeps other parts out.  We used aluminum in the lakester, removable panels... the liner has welded steel between the tubes.

[robfrey]

Stainless, I would also think that the welded in inner panels would also add a little extra strength to the chassis.
What gauge did you use on the liner?

[robfrey]

Backup front tire / wheel combo:
In the event that the salt is bad and we cannot run our aluminum front tires, we want to come up with a rubber tire combination. I know we can only go 300 with these tires but it would give a chance to do some testing and let the crew members license up and have some fun.
I plan on using the Goodyear 2282 tires and a custom aluminum wheel with very large offset. The mounting face of the wheel would have to be even with the mounting bead to keep the steering centered on the contact patch. Who could build me such a wheel?

[Glen]

Rob PM sent

[robfrey]

Thanks Glen!

[robfrey]

http://www.youtube.com/watch?v=EUyd3_5ttN0&feature=youtube_gdata_player

Here is a cfd we did to double check that there is no funny reversions or separations. All is good.

Hope to have chassis complete and sitting in the wheels within 4 weeks.

[Stan Back]

You sure you didn't use an aerobatics program?

[robfrey]

Hmmmm, good question. Have to back to you on that. Lol!

Most of the design you are seeing on this build is based on extremely successful experimental aircraft.
These planes go well over 300 mph near sea level on about 100 shaft HP not including the 85% propeller efficiency. Let's not forget that some of that energy is going into generating enough lift to keep it in flight.
How much whp is required to push your average lakester or streamliner over 300?  Hmmmmm? Why?