Eagler's Nest

Airframes => Single Seaters => XL => Topic started by: Flyguyeddy on December 04, 2017, 03:07:30 PM

Title: Narrowing elevator/h stab to fit in trailer
Post by: Flyguyeddy on December 04, 2017, 03:07:30 PM
Ive seen this done somewhere but cant find it now.   Anyone have any thoughts on this? 
Title: Re: Narrowing elevator/h stab to fit in trailer
Post by: Kiwi55 on December 05, 2017, 05:17:58 AM
On the Cabin Eagle the h stab is 96" wide. I believe this is narrower than the Double Eagle and at 96" would fit in an 8' 6" wide trailer.
Title: Re: Narrowing elevator/h stab to fit in trailer
Post by: Tom XL-7 on December 05, 2017, 06:36:28 AM
In many states, you can go to a 102" trailer. Some hold the line at 96".
Of course, whether the tires and fenders are outside or inside the sidewalls makes a difference. Outside is an easier fabrication. Probably more common.
If you have the trailer then that changes the whole conversation.
I do agree with the 96" tail width and plan to build a 102" custom trailer. 13' sidewalls with a tapered nose. Wings go on walls over fender well, fuselage goes up the middle.
How much do you plan on cutting down? Inches are one thing but feet would require some head scratching.
Tom XL-7
Title: Re: Narrowing elevator/h stab to fit in trailer
Post by: Flyguyeddy on December 05, 2017, 06:38:54 AM
If i could make it fit a 96” trailer without scraping the sides of the doorway id be thrilled
Title: Re: Narrowing elevator/h stab to fit in trailer
Post by: Terry Lundby on December 05, 2017, 09:02:32 AM
I compared the tail volumes of the XL's vertical and horizontal surfaces and they seem to be the optimum area according to Laszlo Pazmany's book, Light Aircraft Design. If I were to reduce the tail span by a couple of inches I’d add more to the chord to maintain the same area although the lower aspect ratio will be less efficient, (and not as purdy). Another route is to lengthen the fuselage and reduce the total tail volume but my brain doesn't have the HP for those calculations.
Below is a link to Joe Spencer's video that describes just what you are asking.  Be cautious reducing the area as he has done. I've never met Mr. Spencer but I think he is a high time pilot and is probably experienced flying less stable AC.  

https://youtu.be/APqoees-w3Y
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