Author Topic: How much wood do you remove?  (Read 4313 times)

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Offline DC

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Re: How much wood do you remove?
« Reply #30 on: July 11, 2020, 11:34:49 pm »
That's great.  I think the original 200fps challenge was just for a pure self bow though.

That seems impossible to me but there is probably someone out there that can do it. :D :D

Offline PaSteve

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Re: How much wood do you remove?
« Reply #31 on: July 11, 2020, 11:35:40 pm »
Wow! Very impressive DC. Congrats on your accomplishment.
"It seems so much more obvious with bows than with other matters, that we are the guardians of the prize we seek." Dean Torges

bownarra

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Re: How much wood do you remove?
« Reply #32 on: July 12, 2020, 12:02:52 am »
Yes come on DC show us the bow :)

Offline DC

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Re: How much wood do you remove?
« Reply #33 on: July 12, 2020, 09:52:06 am »
It's very similar to all the other bows I've posted. 1 3/8 wide tapering to 1" at 19" and then to 3/8" at the tips. 42#@28". Boo backed Yew. I trapped the back, Thanks Bownarra. Bow weighs 420 grams. It had 6 1/8" reflex right after glue up. It's 5 3/4" right now after an overnight sit. It has been 5"-5 1/2" right after unbracing. The set it did take was in the 6" right out of the fades. I had barely enough wood there. In hindsight a power lam may have been in order but I did keep all my heat treat in that area. Oh, I heat treated the belly piece very dark and from both sides. The right (top) limb took the most set so the unbraced and 20" draw pics don't look right. The set didn't happen until the last 2-3" s I didn't try and sort it out. If I could have kept both limbs the same as the left(bottom) limb I think there may have been another couple of fps in it. I'll start pumping arrows through it today as long as my arms last. Haven't been shooting much. I only draw 26-27" when I'm shooting so it shouldn't stress it too much. We'll see.
Thanks for the comments.
 Scp- I think I'll do a separate thread on the machine. Maybe in "How To's"

PS The last two pics were taken before it took the set.

Offline mmattockx

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Re: How much wood do you remove?
« Reply #34 on: July 12, 2020, 10:05:00 am »
It's very similar to all the other bows I've posted. 1 3/8 wide tapering to 1" at 19" and then to 3/8" at the tips. 42#@28". Boo backed Yew. I trapped the back, Thanks Bownarra. Bow weighs 420 grams. It had 6 1/8" reflex right after glue up. It's 5 3/4" right now after an overnight sit. It has been 5"-5 1/2" right after unbracing.

How long is it? How long is the string? How much did you trap it?


Oh, I heat treated the belly piece very dark and from both sides.

With a heat gun? How thick was the belly lam? This bow had 3 lams, correct?


Once you have shot it some I think you should pretty it up and take some glamour pics for us to admire. Your ocean spray bow was beautiful, having one that nice looking that shoots over 200fps would be a really great thing.


Mark

Offline DC

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Re: How much wood do you remove?
« Reply #35 on: July 12, 2020, 10:13:55 am »
Oops-
 66" long Trapped about 1/4". 1/8" on each side.

Yes with a heat gun. I'm thinking about building an oven. Our kitchen oven will only go to 29" long. Belly piece(don't like to call it a lam for some reason) was 3/8" thick. Belly and back, 2 "lams".

Yeah I'll tart it up a bit if it lasts ;D

PS I just realised that I used my radiant heater to heat treat this one. This is the next bow :D
« Last Edit: July 13, 2020, 01:07:37 pm by DC »

Offline DC

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Re: How much wood do you remove?
« Reply #36 on: July 12, 2020, 11:52:40 am »
I had it in the hot box all night at 40%RH@ 80°f. It shot 201 fps this morning. Then I went out back and shot it 35 times and then the mosquitoes and soreness made me come in :D. Then it shot 202fps. I unbraced it and the reflex was 4 7/8". It was 5 3/4 before bracing so that's 7/8" set. Now after ten minutes it's 5 1/4". So it's a bit mushy. It shoots very nice :D

Offline DC

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Re: How much wood do you remove?
« Reply #37 on: July 13, 2020, 12:53:02 pm »
I put a couple of coats of "Tung"oil on it and set it out in the sun to dry. Forgot about it and it sat out, under the eaves, all night. Tested it this morning and got 198-199. Shot it 50 times and retested 198-199. I don't know if sitting out all night affected it.

Offline willie

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Re: How much wood do you remove?
« Reply #38 on: July 13, 2020, 01:26:37 pm »

Quote
Tested it this morning and got 198-199. Shot it 50 times and retested 198-199. I don't know if sitting out all night affected it.

Have you moved the chrono since yesterday?   it might be precise, but not that accurate

whats the difference you ask?

https://www.thoughtco.com/difference-between-accuracy-and-precision-609328

Offline DC

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Re: How much wood do you remove?
« Reply #39 on: July 13, 2020, 02:18:55 pm »
I'm hoping it's both ;D. I haven't moved it but I did turn it off and back on again. :)
What I think is strange is that the bow doesn't lose weight when I shoot it but it did just sitting there, twice.

Offline Tommy D

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Re: How much wood do you remove?
« Reply #40 on: July 13, 2020, 04:07:45 pm »
Wow DC big congrats on breaking the sound barrier! Well done - amazing!

Offline DC

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Re: How much wood do you remove?
« Reply #41 on: July 13, 2020, 04:47:27 pm »
It's gotta last more than a couple of days ;D

Offline DC

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Re: How much wood do you remove?
« Reply #42 on: July 13, 2020, 05:28:26 pm »
Left it out in the sun all day to dry another coat of tung oil then I tested it again. Back up to 203.