From: "maxddnj" <maxdd76@...>
Date: Wednesday, March 21, 2012 8:59 PM
Subject: Re: Carbon Booms - Goodwinds
Date: Wednesday, March 21, 2012 8:59 PM
Subject: Re: Carbon Booms - Goodwinds
Such a great idea. Was the fishing rod tapered?
--- In BugHLG@yahoogroups.com, "kb11troy" <kb10troy@...> wrote:
>
>
>
> I'm getting consistent 90'- 100' launches (measured by a RAM3) on my Bug with the fishing rod boom. Must be working well :)
>
> Rick
>
> --- In BugHLG@yahoogroups.com, Tim Schuh <tim@> wrote:
> >
> > On 3/21/2012 2:31 PM, raincityflyer wrote:
> > >
> > > Make sure you are watching your weights with "retail" CF parts. The OD's may match, but the wall thickness is what kills you.
> > >
> > > The final version of the Little Nipper (Swyft 2) uses a wrapped spar and is really stiff. I opted to go this route to fight the flex you get in a pultruded spar. This flex takes a lot of height out of your launch as the wings oscillate up and down after release. The arc can be pretty dramatic.
> > >
> > > Same goes for the boom. The whipping oscillation deprives you of launch height as the tail wags back and forth.
> > >
> > > Carl designed this plane for a javelin launch with no torsion to the boom. Wing flex was also just a given in those early days.
> > >
> > > The LB will work with any combination of CF parts, just watch your weight. As they say - "Ounces are made up of grams."
> > >
> > > Stay light!
> > >
> > > Chris in Seattle
> > >
> > > I can vouch for the P100 fitting into the new AG37 wing, so don't be afraid to try it.
> >
> >
> > I agree with Chris. I've used P90 and P100 tubes on my 1.2m and 1.5m
> > woodie DLG experiments without any issues at all. In fact I used a P100
> > on a 2M woodie floater pod and boom with good results. There's plenty
> > of stiffness and much lightness. For a quick, very informal comparison
> > here's what I have on hand and within reach. I got all the CF tubes on
> > sale and I don't think I paid more than a few dollars for any of them.
> > I know I got a mess of them for less than $20 shipped to my door in Texas.
> >
> > All tubes are 36" long.
> >
> > Generic fiberglass pushrod tube (I think from a Dave Brown pushrod kit)
> > OD: 0.300
> > ID: 0.241
> > W: 22g
> >
> > SkyShark II (no other markings and I don't remember) CF tube:
> > OD: 0.387
> > ID 0.345
> > W: 17g
> >
> > P90 tube:
> > OD 0.280
> > ID .0240
> > W:11g
> >
> > P100 tube:
> > OD: 0.285
> > ID: 0.240
> > W: 13g
> >
>