wunnabe
Established Member
Joined: Jan/14/2008
Location: Mequon Wisconsin
Online Status: 
Posts: 29
 Building a Skybolt
|
   Topic: bungee installation tool
Posted: Jul/13/2010 at 09:01 |
|
Does anyone have a sketch or drawing showing how to construct a bungee installation tool? I am aware that Steen will rent one out but I would like to have one of my own and from the photos I've seen, it doesn't appear as though it would be difficult to make if one had a drawing/sketch.
|
|
Jim Kidd
|
|
|
|
|
|
jgnunn
Administrator
Joined: Jan/01/2006
Location: Austin, Texas
Online Status:
Posts: 2586
Skybolt S. IO-360 200HP
 View My Gallery
|
Posted: Jul/13/2010 at 09:14 |
|
|
John'Beej'Nunn Blog Skybolt S 200HP. Always go the extra mile. The road won't be crowded...
|
|
|
|
SATCFI
Frequent Flyer
Joined: Dec/10/2009
Location: San Antonio, TX
Online Status:
Posts: 210
Skybolt
|
Posted: Jul/13/2010 at 11:34 |
I looked at this before and can't make heads no tails out about detail A and B in the drawing. Probably my lack of fabrication experience and reading drawings. Can anybody redraw for dummies?
thanks
Brad
|
|
Best regards,
Brad
|
|
|
|
jgnunn
Administrator
Joined: Jan/01/2006
Location: Austin, Texas
Online Status:
Posts: 2586
Skybolt S. IO-360 200HP
View My Gallery
|
Posted: Jul/13/2010 at 11:36 |
|
There's a cleaner version in the forum's Skybolt manual.
|
John'Beej'Nunn Blog Skybolt S 200HP. Always go the extra mile. The road won't be crowded...
|
|
|
|
Marl
Frequent Flyer
Joined: Sep/01/2006
Location: Albany, Ga
Online Status:
Posts: 417
Starduster Too
View My Gallery
|
Posted: Jul/14/2010 at 07:28 |
|
I can take some pics of mine if you need them------it's really pretty simple...
|
|
|
|
|
|
wunnabe
Established Member
Joined: Jan/14/2008
Location: Mequon Wisconsin
Online Status:
Posts: 29
Building a Skybolt
|
Posted: Jul/14/2010 at 07:39 |
|
I would appreciate that Marl!!
|
|
Jim Kidd
|
|
|
|
Marl
Frequent Flyer
Joined: Sep/01/2006
Location: Albany, Ga
Online Status:
Posts: 417
Starduster Too
View My Gallery
|
Posted: Jul/14/2010 at 10:36 |
|
Will break it down and photo-document it tonite.....
|
|
|
|
|
|
SATCFI
Frequent Flyer
Joined: Dec/10/2009
Location: San Antonio, TX
Online Status:
Posts: 210
Skybolt
|
Posted: Jul/14/2010 at 16:42 |
|
Wouldn't you just love to build another Marl, huh, for a really nice South Texan?
|
|
Best regards,
Brad
|
|
|
|
scottly
Frequent Flyer
Joined: Sep/13/2006
Location: Florida
Online Status:
Posts: 1619
Skybolt Delta
|
Posted: Jul/15/2010 at 07:47 |
|
While you're at it...how about some pics of HOW the cords are installed?
|
|
http://scottfactor.com **Warning - political content**
|
|
|
|
Marl
Frequent Flyer
Joined: Sep/01/2006
Location: Albany, Ga
Online Status:
Posts: 417
Starduster Too
View My Gallery
|
Posted: Jul/15/2010 at 10:06 |
overview of Bungee tool --- Go to my Gallery for more pics click link in pane to left under my name......
Edited by Marl - Jul/15/2010 at 10:08
|
|
|
|
|
|
Marl
Frequent Flyer
Joined: Sep/01/2006
Location: Albany, Ga
Online Status:
Posts: 417
Starduster Too
View My Gallery
|
Posted: Jul/15/2010 at 11:09 |
Originally posted by scottly
While you're at it...how about some pics of HOW the cords are installed?
Good idea----when I ever get to the point of installing mine, I'll do just that.
Not hard to do with the right tool......
short version:::
Lightly powder bungee with talc--to help it slide
Hang bungee from front of gear truss
Route it under the gear cross tube and insert the tool through the loop
Hang the "hanger" of the tool on the ear of the rear of the truss
Hold tool in place and start tightening nut---pushing "slider" up the "hanger"
Tighten nut until bungee is at top of tool---ready to drop over onto truss
Nudge bungee into place
Remove tool and reset it
Ready for next Bungee!!
|
|
|
|
|
|
Skybolt540
Frequent Flyer
Joined: Aug/17/2006
Location: United States
Online Status:
Posts: 171
Steen Skybolt
View My Gallery
|
Posted: Jul/16/2010 at 17:37 |
A view of bungee routing for your viewing pleasure.
Kind of bunched up there on the last one, so leave room between strands during installation.
Also, I hear you're supposed to soak them in melted paraffin sealing wax before installation. Can anyone comment on this practice?
|
|
Scott In Ohio ...Spoot
|
|
|
|
Chopmo
Established Member
Joined: Aug/01/2010
Location: Arlington, TX
Online Status:
Posts: 43
Skybolt and Pitts
|
Posted: Aug/22/2010 at 10:37 |
|
Paraffin really helps. I used a heat gun on the paraffin stick and rubbed it on the bungees - I'm certain there are better techniques. Incidentally, Hale recommended KY jelly and I tried that but it is not as effective as paraffin. KY gets sticky and in my opinion is just too messy for this application.
|
|
Chopmo
|
|
|
|
Chopmo
Established Member
Joined: Aug/01/2010
Location: Arlington, TX
Online Status:
Posts: 43
Skybolt and Pitts
|
Posted: Aug/22/2010 at 10:58 |
|
Something else... I rented the bungee tool from Steen. It was missing two important details IMHO. The moving portion should have a little concave divot to keep the bungee seated. See Detail "B" in the Skybolt newletter. I had the bungee slip between the two elements twice. The tool jammed and I had to destroy the bungee both times to free up the tool. I ended up adding the feature to the tool with my gas welder and ball peen hammer. Second the fixed portion should have an inclined ramp shown in Detail "A". This is less important but would have helped the bungee pop into place.
|
|
Chopmo
|
|
|
|
Eric Ashman
Frequent Flyer
Joined: Apr/13/2007
Location: Georgia. USA
Online Status:
Posts: 296
Skybolt (building)
|
Posted: Aug/23/2010 at 05:39 |
Originally posted by Chopmo
Paraffin really helps. I used a heat gun on the paraffin stick and rubbed it on the bungees - I'm certain there are better techniques. Incidentally, Hale recommended KY jelly and I tried that but it is not as effective as paraffin. KY gets sticky and in my opinion is just too messy for this application.
I don't know if pariffin, paraffin wax or KY jelly is really a good thing to use on rubber strands (bungees). This stuff could start deteriating the rubber and maybe shorten thier usable life.
Maybe a tire talk that is used for changing and lubing inner tubes is a better alternative. At least it is made for rubber products.
Eric.
|
|
Eric Ashman. Atlanta GA
|
|
|
|
Marl
Frequent Flyer
Joined: Sep/01/2006
Location: Albany, Ga
Online Status:
Posts: 417
Starduster Too
View My Gallery
|
Posted: Aug/23/2010 at 11:10 |
Lookit this pic---the "ridge" on the backside of the slider is there to prevent the bungee from wedging between the two parts----and is easier to fabricate...
Also---I'd be leery of using anything like wax or KY or ???? for the same reasons as Eric----the danged bungees are "fragile" enough, I'd not want to expedite their breakdown. I do use tire talc---for the same reasons as above.....
Anyone have any other thoughts on the Paraffin???
|
|
|
|
|
|
DragonflyDH90
Frequent Flyer
Joined: Oct/05/2007
Location: New Zealand
Online Status:
Posts: 152
One day a Pitts 12
|
Posted: Aug/23/2010 at 13:17 |
I wouldnt use paraffin wax, although it is fairly benign (even used in baking as a release agent and on baking paper). Thats just a personal thing as I'm always a bit concerned with hydrocarbons and rubber.
KY should be OK, just remember its intended purpose, so should be OK with the bungees.
I would think tire talc would be the best way to go.
|
|
|
|
Chopmo
Established Member
Joined: Aug/01/2010
Location: Arlington, TX
Online Status:
Posts: 43
Skybolt and Pitts
|
Posted: Aug/23/2010 at 16:12 |
Neither paraffin wax nor KY Jelly will deteriorate rubber.
Paraffin wax has been used as a bungee lubricant for decades.
Regarding the slot detail versus a divot as shown in the Skybolt newsletter I prefer the divot because it does not seat the bungee against the edges of a slot. On the other hand, it merely needs to work without damaging the bungee so if it works for you...
Creating the divot feature was no sweat. Heat up the surface to dull red and tap with a ball peen hammer.
|
|
Chopmo
|
|
|
|
