VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics

  #1  
Old 10-05-2019, 11:53 AM
mbauer mbauer is offline
 
Join Date: Nov 2015
Location: Nikiski, AK
Posts: 358
Default Project: Design RV-6 Tire Jack

Working on a creating a portable RV Jac.

Came up with a simple screw jack setup. Now working on getting it manufactured by a local fabrication shop.

Gone through several design changes, have a final edition that isn’t shown, it is over at the metal fab shop for a price quote. As you can see from the photos, I’m not the best welder….

The one that will be built will be close to the following prototype specs:
Weight: 1lb 0.1 oz
Height Before Extension: 4.5”
Height Extended: 7.25”
Base: 3” x 4” x 1/8” Mild Steel Plate
Tower: 1” square mild steel tube
Screw lift: ˝” All Thread

Normally would need a 7/8” wrench to work the nut, now using a square tube and some pins, trying to go tool-less as you can see in some of the photos. Clearing a flat tire/disc brake became a challenge with a couple of the designs.

Photos show some of the prototypes, there are more.

Photo of the best working ones, the one on the right had great promise, until it started leaning while it was being extended; lightest one of the group at 14.2oz, the handles at the bottom hit the tire when full or flat had to use the hose clamp again, it did raise the RV using just the handles to rotate:



This photo shows sliding under the axle. Problem with this jack was it could not be placed under the axle like designed for. Had to slide and lock it under the hose clamp further out. The tabs hit the disc brake…. It did miss the flat tire when it is under the axle, just couldn’t rotate the nut to extend it.


This photo shows the lift available to get the tire off the ground when full. Notice had to lift on the hose clamp due to the disc brake issue.



Another angle while extended.



A different prototype at work. This one cost quite a bit of money for the parts. Over 3lbs but can lift over 7”. Main/bottom thread and nut are from a pipe jack stand.



Trying to get the RV Jac under the axle on pavement and having enough lift was a challenge. In dirt it will be a non-issue, just use the base to scrape a pad.

Best regards,
Mike Bauer
__________________
Mike Bauer
N999SN 1998 Syd Nelson RV-6 (purchased 2017)
UTC -09:00 Alaska
Reply With Quote
  #2  
Old 10-08-2019, 07:55 PM
WingsOnWheels WingsOnWheels is offline
 
Join Date: Mar 2009
Location: Plano, TX
Posts: 1,720
Default

Funny timing, I was thinking of this same type of solution just the other day. Seems a screw jack is the most compact method. I was considering an aluminum body and steel screw.
__________________
Colin P.
RV-6A #20603
Complete 5/10/19
PP SEL / A&P
I donate every year on my B-Day (in Dec), but donated early in Sep'19.
Reply With Quote
  #3  
Old 10-08-2019, 08:16 PM
mbauer mbauer is offline
 
Join Date: Nov 2015
Location: Nikiski, AK
Posts: 358
Default

Quote:
Originally Posted by WingsOnWheels View Post
Funny timing, I was thinking of this same type of solution just the other day. Seems a screw jack is the most compact method. I was considering an aluminum body and steel screw.
Looked at aluminum as well for the "tower" part. Biggest issue for me is all the aluminum in town is 1" pipe or tube with .125" walls. The mild steel has .065 walls. The only real weight saving would be the base, both would be 1/8" thick.

I have enough aluminum to make several, but after looking at the savings, decided it would be easier to drill a couple of lightning holes in the mild steel tower. The aluminum I have was for a different project, but would work on this.

A couple of holes should get the weight down under 1lb. The final prototype weighed in at 1lb 0.1oz.

Best regards,
Mike Bauer
__________________
Mike Bauer
N999SN 1998 Syd Nelson RV-6 (purchased 2017)
UTC -09:00 Alaska

Last edited by mbauer : 10-08-2019 at 08:26 PM.
Reply With Quote
  #4  
Old 10-08-2019, 08:47 PM
WingsOnWheels WingsOnWheels is offline
 
Join Date: Mar 2009
Location: Plano, TX
Posts: 1,720
Default

Quote:
Originally Posted by mbauer View Post
Looked at aluminum as well for the "tower" part. Biggest issue for me is all the aluminum in town is 1" pipe or tube with .125" walls. The mild steel has .065 walls. The only real weight saving would be the base, both would be 1/8" thick.

I have enough aluminum to make several, but after looking at the savings, decided it would be easier to drill a couple of lightning holes in the mild steel tower. The aluminum I have was for a different project, but would work on this.

A couple of holes should get the weight down under 1lb. The final prototype weighed in at 1lb 0.1oz.

Best regards,
Mike Bauer

Makes sense. I have a metal supply house down the street and a 12x28 lathe, so I could make a custom part as needed.
__________________
Colin P.
RV-6A #20603
Complete 5/10/19
PP SEL / A&P
I donate every year on my B-Day (in Dec), but donated early in Sep'19.
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 04:53 PM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.