Bushbaby construction material
Bushbaby construction material
Hi everyone,
Recently someone stated in a topic thread that the Bushbaby fuselage was fabricated from mild steel. Was this just a misundestanding or is it so?
Regards,
Henni
viewtopic.php?t=4973
"The only issue seems to be the extra 21 kg of mass on the nose of the 6 Vs the 4 cylinder Jab engine, given a 2 seater with a useful load of 300 kg – as per the Appolo fox (not sure about the Bushbaby – allegedly the airframe is a little heavier because its mild steel). Given that 100 litres of Mogas or Avgas weighs about 71 kg and I’m unlikely to fly with 2 folks weighing 200 kg total…this 21 kg would seem to not be a problem."
Recently someone stated in a topic thread that the Bushbaby fuselage was fabricated from mild steel. Was this just a misundestanding or is it so?
Regards,
Henni
viewtopic.php?t=4973
"The only issue seems to be the extra 21 kg of mass on the nose of the 6 Vs the 4 cylinder Jab engine, given a 2 seater with a useful load of 300 kg – as per the Appolo fox (not sure about the Bushbaby – allegedly the airframe is a little heavier because its mild steel). Given that 100 litres of Mogas or Avgas weighs about 71 kg and I’m unlikely to fly with 2 folks weighing 200 kg total…this 21 kg would seem to not be a problem."
Keep grassroot aviation alive!
Yes, the welding shop has to be an aviation approved welder. The Bush Baby is built in a jig and mig welded. It is a very neat job.
Monty at the BB factory also does do welding for non-BB clients as well (or he used to). He would be the best person to speak to and maybe he can tell you where to get/supply you some tubing.
The airframe is made up of a lot of triangular sections to give it strength. You must powdercoat it to protect against rust
This is my airframe
call him on 0ate2 seven54 340four
BTW what are you intending building
Monty at the BB factory also does do welding for non-BB clients as well (or he used to). He would be the best person to speak to and maybe he can tell you where to get/supply you some tubing.
The airframe is made up of a lot of triangular sections to give it strength. You must powdercoat it to protect against rust
This is my airframe
call him on 0ate2 seven54 340four
BTW what are you intending building
- Attachments
-
- Powder coated frame.JPG (81.7 KiB) Viewed 3436 times
Last edited by Morph on Mon Jul 23, 2007 3:55 pm, edited 1 time in total.
Greg Perkins
My eldest son has designed a two seater glider utilizing a steel tube/fibreglass body and wood spar/fabric coated wings. He is now scrounging for the money for the chrome moly or s/s tubing to start with the fuselage - man will he be exited about this news tonight which means he can start right away.
Thank you once again for the info Morph.
Regards,
Henni
Thank you once again for the info Morph.
Regards,
Henni
Keep grassroot aviation alive!
- KFA
- Toooooo Thousand
- Posts: 2789
- Joined: Mon Jun 19, 2006 8:09 pm
- Location: Now at Petit (FARA)
- Contact:
Just a correction, the Bushbaby is welded with a Tig welder and not a mig welder. Huge defference. A decent one can be bought from Adendorfs or Unique welding supplies for arround R10.5k all inclusive.
Luck-The moment when preparation meets opportunity.
"Whether you think you can or you think you can't, you're right." -Henry Ford
"Opportunity Is Missed By Most Because It Is Dressed in Overalls and Looks Like Work." - Thomas Alva Edison
BUSHPILOTS FLY TAILDRAGGERS
Failure is not the opposite of success, it is the stepping stone for success
"Whether you think you can or you think you can't, you're right." -Henry Ford
"Opportunity Is Missed By Most Because It Is Dressed in Overalls and Looks Like Work." - Thomas Alva Edison
BUSHPILOTS FLY TAILDRAGGERS
Failure is not the opposite of success, it is the stepping stone for success
Henni
Just make sure. Bushbabies are not made of normal mild steel that you get comercially. I stand corrected but 1010 rings a bell.
Pitts and Piper however use chrome-molly not mild steel. Huge difference in strength and weight between mild steel and chrome molly. Truely amazing stuff and understandable why it is so expensive.
Just make sure. Bushbabies are not made of normal mild steel that you get comercially. I stand corrected but 1010 rings a bell.
Pitts and Piper however use chrome-molly not mild steel. Huge difference in strength and weight between mild steel and chrome molly. Truely amazing stuff and understandable why it is so expensive.
MILD STEEL No. SAE 1010. Yep, sort of the same stuff all the old Pipers up to the Tri-Pacer is made off. IMOAHO perfect aircraft construction stuff. These Bushbabies are built like a bridge. As long as everything is properly tri-angulated, VERY strong. If you look at the way the BB frame is designed, all you see are tri-angles.
NOW. 4130 Chrome Moly tubing = BLOODY expensive. Reasonably difficult to work with, and much more prone to cracking on the welds. Also does not like to bend and the to be moered straight. No no, breaks or cracks.
1010, a little heavier, thicker walls to compensate, but a little more "Bendy" than 4130. So OK. We`re not going to be doing aerobatics in it, and we want to use local stuff to keep the cost down. Go for it :D
NOW. 4130 Chrome Moly tubing = BLOODY expensive. Reasonably difficult to work with, and much more prone to cracking on the welds. Also does not like to bend and the to be moered straight. No no, breaks or cracks.
1010, a little heavier, thicker walls to compensate, but a little more "Bendy" than 4130. So OK. We`re not going to be doing aerobatics in it, and we want to use local stuff to keep the cost down. Go for it :D
- Nick
- Learning to fly
- Posts: 62
- Joined: Fri May 11, 2007 11:57 am
- Location: Pretoria RSA/ Near Guildford Surrey UK
I wondered if anyone would pick up on that, I'm highly compressed Henni! Boet's exposition sounds quite reasonable, hell the triangles work for power line pylons and worked well for Barnes Wallace's WW2 Wellington bomber. Interlocking triangles being a well known, strength enhancing, engineering principle.Henni wrote:Hi everyone,
Recently someone stated in a topic thread that the Bushbaby fuselage was fabricated from mild steel...
Does anyone know, what specifically is the weight penalty (or premium if you prefer) in actual kilos for the Busbaby's mild-steel vs the Kitfox's chrome-molly airframe?
- John Young
- The Boss
- Posts: 1973
- Joined: Tue May 24, 2005 8:38 am
- Location: Jacksonville, Florida, USA
The Savage also has a steel frame as can be seen below.Morph wrote:The BB is not the first plane to have a steel frame. It's been used for years. The Piper Tripacer/Colt is a steel tube and fabric plane and so is a Pitts Special
Regards
John ZU-CIB
- Attachments
-
- Before
- DSC03393.JPG (45.22 KiB) Viewed 3358 times
-
- After
- DSC03421.JPG (91.82 KiB) Viewed 3357 times
Jis, het julle ous daar in Gauties nog nie geleer van vuurmaak hout nie?? You can take that savage frame, have it sandblasted, replace all the missing components, and you have a flying aerie again :D Hell man, you can do a LOT of flying with R80k.
Now try THAT with a portaloo aerie. ( Hatcoatdoor&outahere......) :D
Now try THAT with a portaloo aerie. ( Hatcoatdoor&outahere......) :D
Who is online
Users browsing this forum: No registered users and 27 guests