Hip Pocket Builders' Forum

Indoor Free Flight Forum => CO2 Power, Indoor => Topic started by: danmellor on March 14, 2015, 05:11:05 PM



Title: Bill Brown's Percy
Post by: danmellor on March 14, 2015, 05:11:05 PM
OK: Whimsey finished' scale stuff put aside whilst I build some more stuff for the Barkston hangar in August. As a long time admirer of Mr.Brown's output, I have to do this next! The original is for a G10, but I'm thinking a slight scaling up for a G28 or G43 is in order.

Cheers,

Dan.


Title: Re: Bill Brown's Percy
Post by: Russ Lister on March 14, 2015, 06:31:23 PM
A slightly bigger Percy would be interesting Dan.

Bill's did tend to roll in sometimes outdoors ... a bigger one might cope slightly better?
Having said that, the rubber version that Don made circles nicely in the video I watched again recently.


Title: Re: Bill Brown's Percy
Post by: danmellor on March 17, 2015, 04:45:18 PM
A play around with a tame photocopier gave me a Percy plan of around 11 1/4" span. This gives a similar wing area to my G43 powered Dubois Farman Sport. The Percy would probably end up lighter and the Farman was a lovely flier, once I'd tamed it's decidedly suicidal spiral instability. Looking promising, then!

There don't seem to be many Percy pics floating round, but here's one of the few I found. It shows the layout and cuteness quite well!

Cheers,

Dan.


Title: Re: Bill Brown's Percy
Post by: Don McLellan on March 17, 2015, 05:48:53 PM
Hi Dan,

When I built my Percy, I made built up vertical fins rather than solid balsa. 

Don


Title: Re: Bill Brown's Percy
Post by: danmellor on March 18, 2015, 03:40:48 PM
Hi Don!

I'd seen your pic and noticed the built up fins. I'm not that worried about weight at the rear end, given the 70% cg and the CO2 motor in the nose! I'll see how it looks when the other bits are all done. Very nice video, BTW!

Cheers,

Dan.


Title: Re: Bill Brown's Percy
Post by: danmellor on March 21, 2015, 03:43:22 PM
One wing built and heavily curved longerons laminated. Two choices of colour scheme: Light orange SAMS tissue with dark maroon trim, or SAMS lilac tissue with dayglo scarlet trim! If this proves to be a goer, a bigger version is definitely on the cards...

Cheers,

Dan.


Title: Re: Bill Brown's Percy
Post by: danmellor on April 02, 2015, 02:59:04 PM
Both wings done, covered and doped. pinned down and drying. Basic fus. together, I think it's going to be Brown MJ70 powered. It's only about 11" span, but it's quite a bulky thing in the flesh.

Cheers,

Dan.