Cliff Stamp
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- Joined
- Oct 5, 1998
- Messages
- 17,562
Heafner Model 17 Bowie
The Model 17 Camp Bowie from Heafner knives is made by stock removal out of D2 tool steel. The bowie is a massive 0.275" thick with a 2.8 cm wide primary hollow grind on a huge 4.8 cm wide blade. The primary grind tapers to a fine edge ground to 0.024-0.031" thick and beveled at 19.7 +/- 1.7 degrees per side. The knife has a deep clip point which is very acute due to the hollow primary grind. A shot from the Heafner Knives website :
http://www.heafnerknives.com/Model17.jpg
As the camp bowie was used no comments could be made on new in box factory sharpness. There was however no problem in obtaining a razor edge on the knife with minimal effort. With the edge sharpened to a razor finish, push cutting 3/8" hemp required 24 +/- 1 lbs. Pointing sections of hardwood dowel the bowie was able to rough off the necessary wood in 11.6 +/- 2.7 slices and point a 2.5x1.5" section of birch hardwood in 10.5 +/- 0.3 cuts.
The point profile is decently acute given the hollow primary grind and clip point design, the point tapers from a thickness of 0.275" through a length of 1.2" on a angle of 6.5 degrees, the tip is 0.975" thick at the start of the tip. The camp bowie achieves 141 +/- 4 pages into a phonebook on a 50 lbs push and 839 +/- 28 on a hard vertical stab. The handle was solid in hand with no hot spots during the hardest stabbing and the guard precents slips even with compromised grips.
Runing the camp bowie against the Wildlife Hatchet from Gransfors Bruks on some sections of birch hardwoods, the bowie did well getting 83 +/-2 percent of the raw penetration of the hatchet. However due to the hollow grind it tended to bind more than the hatchet as well the blade tended to want to curve in the cuts which makes it more prone to glancing. The handle worked well though, its large length allowing for a high degrees of versatility in positioning.
http://i7.photobucket.com/albums/y269/CliffStamp/Heafner%20Bowie/heafner_bowie_birch_choppin.jpg
http://i7.photobucket.com/albums/y269/CliffStamp/Heafner%20Bowie/heafner_bowie_birch_cut.jpg
http://i7.photobucket.com/albums/y269/CliffStamp/Heafner%20Bowie/pile_of_birch.jpg
Kitchen:
The bowie works well slicing meats, the blade can ride flat to a cutting board and since meat opens up when cut the thickness of the blade and edge doesn't significantly effect performance and as long as the edge is nice and sharp the knife cuts well. With a hair popping edge it literally floats through a thick roast, cutting through gristle just as easily as the tender cuts. The weight of the knife is an advantage as it aids in the knife pushing through the meats.
http://i7.photobucket.com/albums/y269/CliffStamp/Heafner%20Bowie/lovely_steak.jpg
Obviously the sheer size and weight of the knife make it impractical for precision work in the kitchen, it doesn't work well for peeling potatoes, not that it can't actually handle the cutting, but the size and mass make the fatigue rate high. Similar issues hold when using the knife to cut up vegetables, especially larger ones. Slicing up a turnip for example takes 10-12 lbs with an efficient ktichen knife like the japanese utility from Lee Valley in contrast the Camp Bowie takes more than 30 lbs, and tends to split and crack stiffer vegetables rather than slice them.
Of course for camp work, delicate julienne cuts are probably not a large factor and the bowie cna easily back a few wild vegetables up for the stew pot.
Brush Work :
The bowie was used to limb out some small to medium woods, 3-6" at base. It had nice reach and decent cutting power, and was more effective than a GB hatchet on the smaller branches able to clear more of them in one stroke. It also was better able to cut grasses and other lighter vegetation.
http://i7.photobucket.com/albums/y269/CliffStamp/Heafner%20Bowie/brush_2005.jpg
The bowie was also used to quickly assemble a small one man bough cave. This is a lean-to type shelter but covered in on all sides. The first step is to find a suitable location, you are looking at an area fairly covered in on all sides from wind, lots of suitable materials, decent ground to sleep on and something to either form one or more of the sides. The site :
http://i7.photobucket.com/albums/y269/CliffStamp/Heafner%20Bowie/bough_cave_I.jpg
The location of choice for the bowie primarily was chosen because the large group of Alders made a very efficient brnch point with all the forks, plus they would provide the framework for the shelter construction, being long, light and easy to cut, and as well someone had already lopped down a large tree nearby which would form the main ridgepole and much of the bough covering.
For this shelter a loose framework was used, in an area with really high winds which is open, the framework would need to be lashed, or a much stouter frame would be built out of thicker poles to allow for more roofing material which would eventually hold its onw shape due to its weight. But here the poles where just fixed at the top in the ready made alder notches :
http://i7.photobucket.com/albums/y269/CliffStamp/Heafner%20Bowie/bough_cave_II.jpg
The total time of construction was about fifteen minutes. The Bowie had enough heft to lopp off the poles in 1-2 hits easily shearing off all the branches in one pass and was much more efficient than a small axe due to the ability to clear several branches at one time, also it was much more efficient for similar reasons for cutting light vegetation for bedding, fire or insulation for clothing.
The final shelter was closed in on all sides with just a slight opening to get in, in really high winds or snow or blowing rain a layer of boughs would be extended right down over this as well and you would just push them out of the way to get in. The only thing that remains is to create the bedding as the ground is a little rocky. This can be done with boughs, grasses or even sods if you have the time.
http://i7.photobucket.com/albums/y269/CliffStamp/Heafner%20Bowie/bough_cave_III.jpg
Utility tool :
The camp bowie easily opened and hack up a small can with no significant effect on the edge, just some dulling :
http://i7.photobucket.com/albums/y269/CliffStamp/Heafner%20Bowie/can_cut_hb.jpg
http://i7.photobucket.com/albums/y269/CliffStamp/Heafner%20Bowie/can_slice_hb.jpg
It also cleaved through some light cabling with no problems.
Moving on, it chewed through the top top layer of a small section of sod, it was a bit awkward to handle due to its size and weight, a small knife actually works better for that allowing the sod to but remove much like skinning, just cut through the grass roots and peel it back. The Agent from Dozier actually works very well for that stage of the work. Knives work much better than digging sticks as they can actually cut the grasses and roots.
http://i7.photobucket.com/albums/y269/CliffStamp/Heafner%20Bowie/layer_sod_hb.jpg
On to the hole, a larger knife is much more effective than the smaller ones which easily peel back the sod. Primarily as the longer blade allows more leverage for popping out large rocks, as well as allowing a greater depth to be reached, plus a wider blade makes a better scoop. For most digging a poking motion is used rather than actual heavy swings such as used with a pick. In general since a knife has a much finer point than a pick it doesn't need as much force to break apart the dirt.
http://i7.photobucket.com/albums/y269/CliffStamp/Heafner%20Bowie/hole_hb.jpg
The handle worked well during the digging, even when covered in muck (it was raining off and on), and dirt, there were no issues with slippage though of course it got abrasive with the rocks in the mud, but there is no way to avoid that. Your hands get dirty scooping out the dirt and it goes on the handle shortly after. After digging the hole, the bowie had a few minor chips through the sweep of
the tip and some slight impaction of the tip, all of which was removed after
the next couple of sharpenings.
Note for shelter construction sod makes an excellent bedding material and is a near optimal insulator from both rain and temperature so works very well for both the floor and roof of a shelter, as of course is the dirt. It however takes many times longer to gather than grasses and boughs and is more for a long term shelter. When used for a roofing material it also demands a lot more sturdy base for the shelter because it is way heavier than sheets of thin bark or boughs.
Edge retention :
The bowie was ran alongside a Paramilitary and Manix on some used carpet. The carpet was wet and it was raining at times so corrosion was also likely a factor in the edge loss as well as wear and deformation on the carpet. The blades were tested for sharpness after 64 and then 254 cuts into the carpet by cutting light cotton thread under 500 and then 1000 grams of tension respectively. The bowie had about 50% of the sharpness of the stainless blades after the cutting.
http://i7.photobucket.com/albums/y269/CliffStamp/Heafner%20Bowie/mess_of_carpet_hb.jpg
I have some dry work done to compare this to, possibly repeating the carpet if I get more.
Sharpening :
The Bowie sharpens readily, the edge isn't excessively thick, there are no funky curves or sharp angles and even after extensive blunting such as on the hole digging, the edge is readily reset with a couple of minutes on a x-coarse SiC waterstone then taken up to razor sharpness with a series of finer waterstones and finishing on CrO lapping papper. The entire process only takes about five minutes.
Handle :
The grip for the bowie is a solid handle and a half length which makes it very versatile. It is contoured enough to allow a decently secure grip however not so much extensive grooving so that it lowers grip versatility.
Sheath :
The bowie comes with a solid leather sheath with secure stitching. The blade is however difficult to sheath without the edge contacting the sides as the fit is tight and the belt loop gets in the way. The leather sheaths that came with a couple of Randalls showed an easier draw while still maintaining a very tight fit around the choil, of course they were very broken in, one of the advantages to leather, it wears very well.
The above is just a quick overview, I have a Battle Rat on the way and will be using it and a couple of other tools for a more indepth comparison, hopefully getting a video camera off of a friend and clip some of the shots which would be of benefit like baton work, tip digging and so on to clearify issues like force applied, wedging and so on.
If there is anything you would like to see just drop me an email, if it is kind of extreme, drop Dave an email first to get his opinion on it.
The passaround thread :
http://www.bladeforums.com/forums/showthread.php?t=335257
and of course no review would be complete without a concrete block :
http://i7.photobucket.com/albums/y269/CliffStamp/Heafner%20Bowie/tunnel_vision.jpg
-Cliff
The Model 17 Camp Bowie from Heafner knives is made by stock removal out of D2 tool steel. The bowie is a massive 0.275" thick with a 2.8 cm wide primary hollow grind on a huge 4.8 cm wide blade. The primary grind tapers to a fine edge ground to 0.024-0.031" thick and beveled at 19.7 +/- 1.7 degrees per side. The knife has a deep clip point which is very acute due to the hollow primary grind. A shot from the Heafner Knives website :
http://www.heafnerknives.com/Model17.jpg
As the camp bowie was used no comments could be made on new in box factory sharpness. There was however no problem in obtaining a razor edge on the knife with minimal effort. With the edge sharpened to a razor finish, push cutting 3/8" hemp required 24 +/- 1 lbs. Pointing sections of hardwood dowel the bowie was able to rough off the necessary wood in 11.6 +/- 2.7 slices and point a 2.5x1.5" section of birch hardwood in 10.5 +/- 0.3 cuts.
The point profile is decently acute given the hollow primary grind and clip point design, the point tapers from a thickness of 0.275" through a length of 1.2" on a angle of 6.5 degrees, the tip is 0.975" thick at the start of the tip. The camp bowie achieves 141 +/- 4 pages into a phonebook on a 50 lbs push and 839 +/- 28 on a hard vertical stab. The handle was solid in hand with no hot spots during the hardest stabbing and the guard precents slips even with compromised grips.
Runing the camp bowie against the Wildlife Hatchet from Gransfors Bruks on some sections of birch hardwoods, the bowie did well getting 83 +/-2 percent of the raw penetration of the hatchet. However due to the hollow grind it tended to bind more than the hatchet as well the blade tended to want to curve in the cuts which makes it more prone to glancing. The handle worked well though, its large length allowing for a high degrees of versatility in positioning.
http://i7.photobucket.com/albums/y269/CliffStamp/Heafner%20Bowie/heafner_bowie_birch_choppin.jpg
http://i7.photobucket.com/albums/y269/CliffStamp/Heafner%20Bowie/heafner_bowie_birch_cut.jpg
http://i7.photobucket.com/albums/y269/CliffStamp/Heafner%20Bowie/pile_of_birch.jpg
Kitchen:
The bowie works well slicing meats, the blade can ride flat to a cutting board and since meat opens up when cut the thickness of the blade and edge doesn't significantly effect performance and as long as the edge is nice and sharp the knife cuts well. With a hair popping edge it literally floats through a thick roast, cutting through gristle just as easily as the tender cuts. The weight of the knife is an advantage as it aids in the knife pushing through the meats.
http://i7.photobucket.com/albums/y269/CliffStamp/Heafner%20Bowie/lovely_steak.jpg
Obviously the sheer size and weight of the knife make it impractical for precision work in the kitchen, it doesn't work well for peeling potatoes, not that it can't actually handle the cutting, but the size and mass make the fatigue rate high. Similar issues hold when using the knife to cut up vegetables, especially larger ones. Slicing up a turnip for example takes 10-12 lbs with an efficient ktichen knife like the japanese utility from Lee Valley in contrast the Camp Bowie takes more than 30 lbs, and tends to split and crack stiffer vegetables rather than slice them.
Of course for camp work, delicate julienne cuts are probably not a large factor and the bowie cna easily back a few wild vegetables up for the stew pot.
Brush Work :
The bowie was used to limb out some small to medium woods, 3-6" at base. It had nice reach and decent cutting power, and was more effective than a GB hatchet on the smaller branches able to clear more of them in one stroke. It also was better able to cut grasses and other lighter vegetation.
http://i7.photobucket.com/albums/y269/CliffStamp/Heafner%20Bowie/brush_2005.jpg
The bowie was also used to quickly assemble a small one man bough cave. This is a lean-to type shelter but covered in on all sides. The first step is to find a suitable location, you are looking at an area fairly covered in on all sides from wind, lots of suitable materials, decent ground to sleep on and something to either form one or more of the sides. The site :
http://i7.photobucket.com/albums/y269/CliffStamp/Heafner%20Bowie/bough_cave_I.jpg
The location of choice for the bowie primarily was chosen because the large group of Alders made a very efficient brnch point with all the forks, plus they would provide the framework for the shelter construction, being long, light and easy to cut, and as well someone had already lopped down a large tree nearby which would form the main ridgepole and much of the bough covering.
For this shelter a loose framework was used, in an area with really high winds which is open, the framework would need to be lashed, or a much stouter frame would be built out of thicker poles to allow for more roofing material which would eventually hold its onw shape due to its weight. But here the poles where just fixed at the top in the ready made alder notches :
http://i7.photobucket.com/albums/y269/CliffStamp/Heafner%20Bowie/bough_cave_II.jpg
The total time of construction was about fifteen minutes. The Bowie had enough heft to lopp off the poles in 1-2 hits easily shearing off all the branches in one pass and was much more efficient than a small axe due to the ability to clear several branches at one time, also it was much more efficient for similar reasons for cutting light vegetation for bedding, fire or insulation for clothing.
The final shelter was closed in on all sides with just a slight opening to get in, in really high winds or snow or blowing rain a layer of boughs would be extended right down over this as well and you would just push them out of the way to get in. The only thing that remains is to create the bedding as the ground is a little rocky. This can be done with boughs, grasses or even sods if you have the time.
http://i7.photobucket.com/albums/y269/CliffStamp/Heafner%20Bowie/bough_cave_III.jpg
Utility tool :
The camp bowie easily opened and hack up a small can with no significant effect on the edge, just some dulling :
http://i7.photobucket.com/albums/y269/CliffStamp/Heafner%20Bowie/can_cut_hb.jpg
http://i7.photobucket.com/albums/y269/CliffStamp/Heafner%20Bowie/can_slice_hb.jpg
It also cleaved through some light cabling with no problems.
Moving on, it chewed through the top top layer of a small section of sod, it was a bit awkward to handle due to its size and weight, a small knife actually works better for that allowing the sod to but remove much like skinning, just cut through the grass roots and peel it back. The Agent from Dozier actually works very well for that stage of the work. Knives work much better than digging sticks as they can actually cut the grasses and roots.
http://i7.photobucket.com/albums/y269/CliffStamp/Heafner%20Bowie/layer_sod_hb.jpg
On to the hole, a larger knife is much more effective than the smaller ones which easily peel back the sod. Primarily as the longer blade allows more leverage for popping out large rocks, as well as allowing a greater depth to be reached, plus a wider blade makes a better scoop. For most digging a poking motion is used rather than actual heavy swings such as used with a pick. In general since a knife has a much finer point than a pick it doesn't need as much force to break apart the dirt.
http://i7.photobucket.com/albums/y269/CliffStamp/Heafner%20Bowie/hole_hb.jpg
The handle worked well during the digging, even when covered in muck (it was raining off and on), and dirt, there were no issues with slippage though of course it got abrasive with the rocks in the mud, but there is no way to avoid that. Your hands get dirty scooping out the dirt and it goes on the handle shortly after. After digging the hole, the bowie had a few minor chips through the sweep of
the tip and some slight impaction of the tip, all of which was removed after
the next couple of sharpenings.
Note for shelter construction sod makes an excellent bedding material and is a near optimal insulator from both rain and temperature so works very well for both the floor and roof of a shelter, as of course is the dirt. It however takes many times longer to gather than grasses and boughs and is more for a long term shelter. When used for a roofing material it also demands a lot more sturdy base for the shelter because it is way heavier than sheets of thin bark or boughs.
Edge retention :
The bowie was ran alongside a Paramilitary and Manix on some used carpet. The carpet was wet and it was raining at times so corrosion was also likely a factor in the edge loss as well as wear and deformation on the carpet. The blades were tested for sharpness after 64 and then 254 cuts into the carpet by cutting light cotton thread under 500 and then 1000 grams of tension respectively. The bowie had about 50% of the sharpness of the stainless blades after the cutting.
http://i7.photobucket.com/albums/y269/CliffStamp/Heafner%20Bowie/mess_of_carpet_hb.jpg
I have some dry work done to compare this to, possibly repeating the carpet if I get more.
Sharpening :
The Bowie sharpens readily, the edge isn't excessively thick, there are no funky curves or sharp angles and even after extensive blunting such as on the hole digging, the edge is readily reset with a couple of minutes on a x-coarse SiC waterstone then taken up to razor sharpness with a series of finer waterstones and finishing on CrO lapping papper. The entire process only takes about five minutes.
Handle :
The grip for the bowie is a solid handle and a half length which makes it very versatile. It is contoured enough to allow a decently secure grip however not so much extensive grooving so that it lowers grip versatility.
Sheath :
The bowie comes with a solid leather sheath with secure stitching. The blade is however difficult to sheath without the edge contacting the sides as the fit is tight and the belt loop gets in the way. The leather sheaths that came with a couple of Randalls showed an easier draw while still maintaining a very tight fit around the choil, of course they were very broken in, one of the advantages to leather, it wears very well.
The above is just a quick overview, I have a Battle Rat on the way and will be using it and a couple of other tools for a more indepth comparison, hopefully getting a video camera off of a friend and clip some of the shots which would be of benefit like baton work, tip digging and so on to clearify issues like force applied, wedging and so on.
If there is anything you would like to see just drop me an email, if it is kind of extreme, drop Dave an email first to get his opinion on it.
The passaround thread :
http://www.bladeforums.com/forums/showthread.php?t=335257
and of course no review would be complete without a concrete block :
http://i7.photobucket.com/albums/y269/CliffStamp/Heafner%20Bowie/tunnel_vision.jpg
-Cliff