First Bow Using Heat Strips and Air Hose

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greybeard
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First Bow Using Heat Strips and Air Hose

#1 Post by greybeard » Thu Dec 02, 2010 6:08 pm

I must say that I am impressed with the heat strip system and once familiar with the procedures it is quick and easy to use.

Clear glass was used on this initial project so I could verify that the air pressure had been applied correctly. Air was applied in 10# increments until 60# was reached. There were no trapped air bubbles under the clear glass so I am happy with the procedure.

Apart from using the system in my flat bow workshops it is also suitable for the deflex/reflex and Italian Renaissance bows that I make.

The bow depicted has not had a final cleanup or application of clear finish and the handle area has not been finished. It was purposely left this way so it would become a "stock" bow that could be shaped to the prospective customer's preference.
1 Heat Strip Bow Handle.jpg
1 Heat Strip Bow Handle.jpg (22.65 KiB) Viewed 1411 times
2 Heat Strip Bow Handle.jpg
2 Heat Strip Bow Handle.jpg (31.94 KiB) Viewed 1411 times
3 Heat Strip Bow Tip.jpg
3 Heat Strip Bow Tip.jpg (43.38 KiB) Viewed 1411 times
4 Heat Strip Bow Limb.jpg
4 Heat Strip Bow Limb.jpg (13.41 KiB) Viewed 1411 times
It is uncanny how things work out.

Whilst writing this story I received a phone call from a client wanting a bow in the 35# to 40# weight range. He is coming over Wednesday for a custom fit.

The bow specifications are as follows;

Draw weight is 38# @ 28" and the bow is 68" ntn.

Handle is Brigalow and Black Wattle separated with Black Bean and Bamboo.

The core is made up of one parallel and two tapered laminations of vertical bamboo and sandwiched between .043 clear Bo-tuff glass.

Tip overlays are late growth black wattle and clear glass.

Unfortunately with the lousy weather I have not been able to put arrows through the chronograph but the bow seemed to like the 466 grain hoop pine Wallace Woods. The bow feels well balanced and there is no hand shock.

The second bow off the form is 48# @ 28" so it will become a “stock" bow.

First arrows out of the unfinished bow and no nocking point.
5 First Arrows Off Heat Strip Bow.JPG
5 First Arrows Off Heat Strip Bow.JPG (47.17 KiB) Viewed 1411 times
I think I will have to shout myself some recurve heat strips for Xmas.

Daryl.
Last edited by greybeard on Mon Oct 24, 2011 6:14 pm, edited 1 time in total.
"And you must not stick for a groat or twelvepence more than another man would give, if it be a good bow.
For a good bow twice paid for, is better than an ill bow once broken.
[Ascham]

“If a cluttered desk is a sign of a cluttered mind, of what, then, is an empty desk a sign?” [Einstein]

I am old enough to make my own decisions....Just not young enough to remember what I decided!....

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Gringa Bows
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Re: First Bow Using Heat Strips and Air Hose

#2 Post by Gringa Bows » Thu Dec 02, 2010 6:19 pm

The bow looks good Daryl.

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bigbob
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Re: First Bow Using Heat Strips and Air Hose

#3 Post by bigbob » Thu Dec 02, 2010 6:59 pm

Like the look of it ,congrats.
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longbow steve
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Re: First Bow Using Heat Strips and Air Hose

#4 Post by longbow steve » Thu Dec 02, 2010 8:03 pm

Well done Daryl, The bow looks nice. Your thoughts and recommendations re the heat strips are appreciated. Steve

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stringnstik
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Re: First Bow Using Heat Strips and Air Hose

#5 Post by stringnstik » Fri Dec 03, 2010 6:11 am

Fantastic Daryl, looking the goods for sure. Nice combination in woods too.
"I am the arrow..the arrow is me...together as one...I fly to thee"
"the stick maybe crooked and the string hath no form,
then married by bowyer, transforms when first drawn"
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rodlonq
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Re: First Bow Using Heat Strips and Air Hose

#6 Post by rodlonq » Fri Dec 03, 2010 8:11 am

Great looking bow Daryl, It is good you have had success with the heat strips.

"Clear glass was used on this initial project so I could verify that the air pressure had been applied correctly. Air was applied in 10# increments until 60# was reached. There were no trapped air bubbles under the clear glass so I am happy with the procedure."

How fast do you ramp up the pressure? Given that the heat application is almost instant and the cook time very short, it must be quite quick, or do you slowly get it up to full pressure before turning on the heat strips? Thanks.

Cheers..... Rod

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g_r
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Re: First Bow Using Heat Strips and Air Hose

#7 Post by g_r » Fri Dec 03, 2010 9:21 am

Great looking bow!

By the way, after seeing youre group of arrows.....could you unfinish my bow and take my nocking point away? :wink: Thats great shooting!
watch youre feet, you may never know where they might take you....

Always scout like you are scouting scouts!

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Chase N. Nocks
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Re: First Bow Using Heat Strips and Air Hose

#8 Post by Chase N. Nocks » Fri Dec 03, 2010 9:49 am

Another fine job there mate. I know you don't like to think of yourself as a master bowyer, and it has been debated here before exactly what that standard or criteria may be, but you seem to do a remarkable job on every bow with a versatile wealth of knowledge.

Now when are we gunna see some checkered riser handles. :wink: :)

Cheers
Troy
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....enforced by the "whistling grey-goose wing."
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greybeard
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Re: First Bow Using Heat Strips and Air Hose

#9 Post by greybeard » Fri Dec 03, 2010 5:12 pm

Hi Rod,

One minute intervals are ok.

You cannot apply heat until the form is locked up and under hose pressure. It can take some fifteen minutes or more to reach temperature and I believe the form absorbs a lot of the initial heat.
After gluing up the bow there is about twenty minutes pot life with Smooth On before it starts going to the gell stage.

I believe heat boxes are brought up to temperature before the locked up bow is placed in the box.

Daryl.
"And you must not stick for a groat or twelvepence more than another man would give, if it be a good bow.
For a good bow twice paid for, is better than an ill bow once broken.
[Ascham]

“If a cluttered desk is a sign of a cluttered mind, of what, then, is an empty desk a sign?” [Einstein]

I am old enough to make my own decisions....Just not young enough to remember what I decided!....

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rodlonq
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Re: First Bow Using Heat Strips and Air Hose

#10 Post by rodlonq » Tue Dec 07, 2010 10:18 am

Hi Daryl,

Thanks for your explanation, very clear now (and no bubbles as well :lol: ).

Cheers..... Rod

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