Land grader design question

[FTG-05]

I plan to design and build my own land grader so I can better maintain the one mile gravel I live on. Right now I'm using a ~700lb 6' box blade. The BB works great for about 85% of the road, but there are two-three places that turn into mudholes and I have the "wavy" road surface that's a pain to work with a BB.

My plan is 3/8" side walls using two 5"x5"x3/8" angle as the cutting blades. I'll drop the "blades" below the sidewalls by about 3/4"-1" (i.e. about the same as the BB cutter).

My question is this: Angle the blades or keep them straight (i.e. 90 degrees to the direction of travel)?

My preference is to angle them (right side forward; left side towards the back) to try and get some of the side gravel back onto the road bed, plus help with crown.

Comments, suggestions, wise cracks, all the above?

Thanks!

 

[RDrancher]

My Landpride has angled blades, so I'll throw my two cents into the pot.

The angled blades provide very little side to side material movement, that I've seen anyway. I think that the angled blades do help to "slice" and level washboard though. It's just like grading packed washboard dirt with a bucket. If you attack the humps at a bit of an angle, it's easier to get it flat. I run my land plane's blades at 3/8" below the skids in front and level with the skids in back.

 

[zzvyb6]

Properly angled blades serve several tasks: They reduce the wavelength of the ripples in the roasdway as they slice off the high spots. For that reason, even a landscape rake set at 45 degrees does a fine job of this. Also, the angle makes the material flow better from the front carver blade to the rear leveler blade. There is usually a height difference between them, too.

I suggest you watch a few videos on YouTube showing how some of these road graders work. Watch the material flow from front to back. That will give you some ideas on how you want yours to function.

 

[jenkinsph]

I think you can go either straight or angled blades on a land plane and couldn't tell the difference. I use straight blades on mine for field leveling and when I designed it back in 2009 thought this would be better for my intended uses. When grading a road never have had an issue with ripples, the long longitudinal skids prevent this problem. When using a landscape rake or rear blade without the benefit of the skids angling the blade makes a huge difference. The angle setting on most of the land planes I have seen is limited to about 10 degrees, not enough to make much difference. One benefit of the angled blades is less tracking or overflow which is limited to one side of the plane, so might have better looking finish,

I would recommend you work in the cost of good grader blades into your project.

Having built two straight blade land planes here are some things to consider that I have learned. First I find that the skids can carry a lot of gravel and drop them on the lawn or roadway so my second land plane I used box tubing to eliminate this issue, no flanges to hold the rocks. My cross supports are to low and can hold grass and debris where sod is present in large amounts, make sure you have plenty of clearance. Gordon Gould pointed this out to me and was correct but it was already built. I will raise the cross members on my larger land plane to eliminate this when I have the time. Another thing is to make sure the whole frame assembly is rigid without any flexing the whole purpose of a plane is to mill the surface for lack of a better term. So build a heavy strong structure that won't give or allow the blades to deflect.

There will be a lot of comments about the slicing ability of the angled blades and in theory it sounds good but with only about 10 degrees of angle it isn't going to make a difference imo. From what I have seen and read on the forum I am one of the few who has built straight blade land planes and have used both types. I am not opposed to either design but find that the straight blades work better for large area smoothing because when pitching the land plane forward the blades will stay parallel with the surface. This is not an issue for driveway work as this can be desirable to have the leading edge on one side cut deeper. If I did more driveway work I would consider having one of each.

Here are the two land planes I have built, cost about $110/ft of width for materials.

 

[FTG-05]

Properly angled blades serve several tasks: They reduce the wavelength of the ripples in the roasdway as they slice off the high spots. For that reason, even a landscape rake set at 45 degrees does a fine job of this. Also, the angle makes the material flow better from the front carver blade to the rear leveler blade. There is usually a height difference between them, too.

I suggest you watch a few videos on YouTube showing how some of these road graders work. Watch the material flow from front to back. That will give you some ideas on how you want yours to function.

I've watched a bunch of these, the one I recall the best is the EA version they posted here and on their site; hence that's why I recall the angled blades.

One problem though I see in virtually every video I've seen is that the driveway is already pretty smooth and it looks like all they're doing is finish type work, not really getting rid of big problem areas (i.e. a road that's been neglected for quite some time). About 85% of my one mile drive is fine - the BB works for that. It's the other 15% that has the mudholes and the long wave dips and bumps. This is the part I'm trying to address, not just for this year but for the foreseeable future (i.e. as long as I live here, which hopefully will be quite a while).

I think you can go either straight or angled blades on a land plane and couldn't tell the difference. I use straight blades on mine for field leveling and when I designed it back in 2009 thought this would be better for my intended uses. When grading a road never have had an issue with ripples, the long longitudinal skids prevent this problem. When using a landscape rake or rear blade without the benefit of the skids angling the blade makes a huge difference. The angle setting on most of the land planes I have seen is limited to about 10 degrees, not enough to make much difference. One benefit of the angled blades is less tracking or overflow which is limited to one side of the plane, so might have better looking finish,

I would recommend you work in the cost of good grader blades into your project.

[snip for quote brevity]

Here are the two land planes I have built, cost about $110/ft of width for materials.

I have worked two grader blades into this project but it will be some time in the future - I still have one house to sell.

I saw your grader pics in another thread and saved them to my PC - this is where I got the idea to do one in the first place - it may have been you who recommended I build/buy a land grader in that other thread.

Rigidity and high cross bars/tubes: got it.

Unfortunately, I just bought the steel for this and one of those was the 3/8"x 2 1/2" for the bottom runners. Oh well.

Thanks,

 

[RDrancher]

I've watched a bunch of these, the one I recall the best is the EA version they posted here and on their site; hence that's why I recall the angled blades.

One problem though I see in virtually every video I've seen is that the driveway is already pretty smooth and it looks like all they're doing is finish type work, not really getting rid of big problem areas (i.e. a road that's been neglected for quite some time). About 85% of my one mile drive is fine - the BB works for that. It's the other 15% that has the mudholes and the long wave dips and bumps. This is the part I'm trying to address, not just for this year but for the foreseeable future (i.e. as long as I live here, which hopefully will be quite a while).

Unfortunately, I just bought the steel for this and one of those was the 3/8"x 2 1/2" for the bottom runners. Oh well.

Scarifying helps the rough areas prior to pulling the landplane. I think after you get it in shape the first time that keeping it in shape with just the landplane will be pretty easy.

The runners carrying material is more of an annoyance that anything when your doing work for customers. Nothing ticks me off more than dropping gravel off on a lawn that I've spent hours trying not to screw up. I hate picking gravel out of grass!

 

[CalG]

How about just adding side runners to your BB

Not much out of pocket $, and if it doen't work to your liking, Well, You have the runners for your land plane on hand ;-)

Sort of the "incemental approach". ;-)

 

[FTG-05]

How about just adding side runners to your BB

Not much out of pocket $, and if it doen't work to your liking, Well, You have the runners for your land plane on hand ;-)

Sort of the "incemental approach". ;-)

Funny you should mention that:

This land grader will not be a stand alone implement. I'll have it bolted to the back of my box blade. Like I said above, I'm still paying for two homes until we sell the Madison house and I get paid nothing to maintain this one mile gravel road. So I'm going to make do with what I can.

I guess I gotta take back that comment about not getting paid to maintain the road: If the runners hold as much gravel as you guys suggest, I'll just "clean my box blade" out near my pole barn and recycle the gravel where I could use some......

Thanks!

 

[MtnViewRanch]

Funny you should mention that:

This land grader will not be a stand alone implement. I'll have it bolted to the back of my box blade. Like I said above, I'm still paying for two homes until we sell the Madison house and I get paid nothing to maintain this one mile gravel road. So I'm going to make do with what I can.

I guess I gotta take back that comment about not getting paid to maintain the road: If the runners hold as much gravel as you guys suggest, I'll just "clean my box blade" out near my pole barn and recycle the gravel where I could use some......

Thanks!

I think that the guys complaining about the runners holding material are professionals and don't like material falling into the grass that they might be working next to for their customers. While my runners collect material, it is nothing that I worry about, in fact if I let it just build up, it packs in at a 45 degree slope and doesn't hold any more, so then nothing falls out anyway. Conditions can make a big difference with what one needs.

Use your box blade for now, but a LPGS is faster and easier in the long run.

 

[PILOON]

We had a home made grader or 'drag' with 3 angled blades, the overall size being 8' wide by 8' long.
All blades were angled and it worked great.
The angles were calculated so that the angle of the one about balanced the drag of the other 2. i.e. one at 30 deg and the other 2 at 15 deg each to balance the resistance in order to follow in a straight line, worked out quite well.
With 2 blades you invite humps to not be well 'scalped' while with 3 blades you get a nice even surface, the idea being like a road grader with blade in middle.
Or again, first blade scalps, 2nd spreads and fills holes while the 3rd acts as a finishing blade.
Angling the blades makes the scalped loose material travel from side to side.