Archive of the Yahoo! Groups mailing list for the Bug hand-launch glider 2002-2018

From: Stan English <sta_eng@...>
Date: Saturday, March 12, 2011 5:06 PM
Subject: Re: [BugHLG] Weak points
On 3/8/2011 2:22 PM, Lee wrote: > > Hi Paul > Two areas to consider, both having to do with when the plane was designed, > and subsequent advances in launching technique and radio gear. > > As mentioned earlier, extend the wing spar into the tip. The tip will not > stand up to any kind of SAL launching, which will give you much greater > hight than a javelin toss, and is much easier on the arm. Maybe include a > pin or blade next to the last rib for launching. > > The fuse is very fragile. Either use 3/32" wood, or light glass (3/4 > oz) or > both. The bug was designed around the Hitec HS-50 servos, 555 receiver > and a > 3x50ma nicad battery. That is (was) about 48g (1.7oz) in radio gear. > Therefore, the fuse had to be built short, and as light as possible to > properly balance the plane without adding tail weight... You do build your > tail feathers as light as possible, right? My current micro system of > choice > is a Castle Creations Berg 4L receiver, Dymond D47 servos and a 2x120 mah > LiPo battery. This gives an all up weight of 13.4g (0.5oz). (Blade mCX > Heli > batteries are cheap and easy to get) This is the only (good) combination > that I know of that will run on 2 LiPos without a regulator. > This also allows for a stouter fuse. Better added strength in the > nose, than > added lead to balance. You also might (should) lengthen the nose a bit to > help with the balance with this light of a radio. Maybe as much as an inch > (or more) if you keep you tail light. > > With this radio, a 3oz Bug is easily obtainable. Just keep your tail > light, > and don't waist all the weight savings with lead. My current Bug is rocket > launched and weighs ~90g with a spent rocket motor casing on board.... > > HTH > > Lee > > *Sometimes I think the surest sign that intelligent life exists > elsewhere in > the universe is that none of it has tried to contact us.* > -*Bill Watterson* > > On Tue, Mar 8, 2011 at 11:40 AM, Paul LaChance <plachance@... > <mailto:plachance%40cox.net>> wrote: > > > Hi all, > > > > I am about to cut out the parts to make up 4 Bugs. Before I start, what > > are the weak points that need improvement or places that need to be > > strengthened? It is easy to tweak it now before I start building than > > after. > > > > Thanks in advance. > > > > Paul > > > > [Non-text portions of this message have been removed] > > > > > > > > ------------------------------------ > > > > Home Page - http://groups.yahoo.com/group/BugHLG/ > > > > Yahoo! Groups Links > > > > > > > > > > [Non-text portions of this message have been removed] > > Lee, When you say you are using two mCX Heli batteries. Are you using them in parallel for 3.7v or are they in series for 7.4v? From what I read it looks like you are using them in series. Just verifying. :-\ Stan [Non-text portions of this message have been removed]