About time with the HW90

[JayJay]

Thanks for sharing your info on the 90. Like I said I went from thinking it was a torture to use, to buying a second. Ironically I shot the .20 yesterday, but the scope moved, can hardly wait to use it. The stop pin, rattled loose.
The sound is distinct and cool. This is quickly becoming a go to rifle. Can’t wait for better weather and play with the different bars.
What is the highest bar you can pump it to? Just curious.
Again thanks. Crow

That's an interesting question. I haven't gone over 26 bar. Weihrauch says 26 is max. The Beeman RX tech manual says to not exceed 24 bar. Engineering designs always have a margin of safety built in, often 10%. so it may be safe to go to 28 or 29 bar. But even if it's safe, you will get accelerated wear and potentially early failure. The cocking effort at 26 bar is ludicrous. I ran some rough numbers to estimate the shear load on the little cocking linkage pins, and it looks ok. But you wonder...

I don't see a benefit to going over 20 bar for the stock seal and 24 bar for a Vortek seal. My test showed standard seal peak power happens at 20 bar and 21 fpe. Vortek seal peak power is around 24 bar and 30+ fpe. (There is a possibility that Beeman used a different seal in the RX. Some reviews report higher power than is typical for the HW90s.)

My personal comfort zone is around 20 bar.

Below are my Vortek seal FPE and FPS graphs, using Crosman .22 14.3 grain pellets. It goes from 26 bar down to 5 bar. It's stepped because I shot five pellets at each bar level. Note that my gun has a HW95 carbine barrel, and I took the inertia weight out. I don't think that affects power output.

I just noticed that Vortek rates their new HW80 PG4 kit at 23 FPE (if you use the Vacuseal). That makes sense considering the HW80 has a bore and stroke similar to the HW90.

I hope that helps.

 

[JayJay]

I use a i piece scope mount with pin HW90. 22. cal has never moved . It a Diana droop compensator. Mount View attachment 341278

Nice! I considered buying a custom stock, but the standard one just looks so good!

 

[Mcrafty1]

I don't mean to hijack the thread but... I see a lot of mention of 'barrel droop' in this one.
I'm looking hard at a Beeman R9 at PA. Got it in the shopping cart with my finger hovering the send button...My question is, with the wedge type barrel lock these guns still have barrel droop issues? how many pellets would one need to run through one of these rifles before he could expect to see barrel droop develop? or is it part of the engineering with the gun?

 

[JayJay]

I don't mean to hijack the thread but... I see a lot of mention of 'barrel droop' in this one.
I'm looking hard at a Beeman R9 at PA. Got it in the shopping cart with my finger hovering the send button...My question is, with the wedge type barrel lock these guns still have barrel droop issues? how many pellets would one need to run through one of these rifles before he could expect to see barrel droop develop? or is it part of the engineering with the gun?

Good question. I'm afraid I kinda hijacked the thread already.

Check out my post on that very subject.

Tuning - HW90 barrel droop

I lucked out and was able to buy a totally trashed HW80 barrel on ebay. LOL. The guy's description sounded apologetic, he knew it was not salvageable. But it has been perfect for my purposes, so I should thank him. The issue is that both of my HW90's have barrel droop. About 0.5 degrees at the...

www.airgunnation.com

Yes, some of the Weihrauchs do have barrel droop. I don't have a full understanding of which models or years have it.

I have a HW30 and HW95 from Arizona Airguns. Both were the 'hunter' models which come with no iron sights and a scope. Both have zero barrel droop. On the other hand, I bought two new HW90's from AoA and both have exactly 0.5 degrees of droop. In frustration I ordered a new cylinder from Krale and it too had 0.5 degrees of droop.

So it looks like HW90 droop is machined into the cylinder dimensions. Not the barrel. For example, my HW95 barrel has no droop in the 95, but when I swapped it into my HW90, it had 0.5 degrees.

Here's my theory. Weihrach intentionally ships the 'iron sights' model with cylinder that provides 0.5 degrees of droop. It's a traditional thing that drops the back of the cylinder out of the way so you can see the iron sights better. For scope sight models they ship a different cylinder that removes just enough metal on the mating surface to provide exact alignment. But this is just a theory.

The Weihrauch barrel latch design is very robust and precise. I doubt that you'll ever change the alignment, no matter how much you use the gun.

Regarding that R9. I would be interested if it has droop. I have a theory that Beeman ordered their rifles without droop.

 

[Mcrafty1]

Good question. I'm afraid I kinda hijacked the thread already.

Check out my post on that very subject.

Tuning - HW90 barrel droop

I lucked out and was able to buy a totally trashed HW80 barrel on ebay. LOL. The guy's description sounded apologetic, he knew it was not salvageable. But it has been perfect for my purposes, so I should thank him. The issue is that both of my HW90's have barrel droop. About 0.5 degrees at the...

www.airgunnation.com

Yes, some of the Weihrauchs do have barrel droop. I don't have a full understanding of which models or years have it.

I have a HW30 and HW95 from Arizona Airguns. Both were the 'hunter' models which come with no iron sights and a scope. Both have zero barrel droop. On the other hand, I bought two new HW90's from AoA and both have exactly 0.5 degrees of droop. In frustration I ordered a new cylinder from Krale and it too had 0.5 degrees of droop.

So it looks like HW90 droop is machined into the cylinder dimensions. Not the barrel. For example, my HW95 barrel has no droop in the 95, but when I swapped it into my HW90, it had 0.5 degrees.

Here's my theory. Weihrach intentionally ships the 'iron sights' model with cylinder that provides 0.5 degrees of droop. It's a traditional thing that drops the back of the cylinder out of the way so you can see the iron sights better. For scope sight models they ship a different cylinder that removes just enough metal on the mating surface to provide exact alignment. But this is just a theory.

The Weihrauch barrel latch design is very robust and precise. I doubt that you'll ever change the alignment, no matter how much you use the gun.

Regarding that R9. I would be interested if it has droop. I have a theory that Beeman ordered their rifles without droop.

It is a possibility that your theory is correct. It just seems bazaar that Weihrauch would do that without it being made known to buyers when they purchase the rifles with/without scopes. I mean to say that arguably one of the best break barrel rifles sold on the open market today , if bought without a scope and one decides at a later date to scope the rifle without knowing this issue wouldn't buy a 'droop mount? Which would create a whole new problem that some may never figure out, and instead spend countless hours bashing their good name in forums. That would be doing a great disservice to both manufacturer and purchasers. For instance, here we are poking around that problem now.

 

[Frogy]

Good question. I'm afraid I kinda hijacked the thread already.

Check out my post on that very subject.

Tuning - HW90 barrel droop

I lucked out and was able to buy a totally trashed HW80 barrel on ebay. LOL. The guy's description sounded apologetic, he knew it was not salvageable. But it has been perfect for my purposes, so I should thank him. The issue is that both of my HW90's have barrel droop. About 0.5 degrees at the...

www.airgunnation.com

Yes, some of the Weihrauchs do have barrel droop. I don't have a full understanding of which models or years have it.

I have a HW30 and HW95 from Arizona Airguns. Both were the 'hunter' models which come with no iron sights and a scope. Both have zero barrel droop. On the other hand, I bought two new HW90's from AoA and both have exactly 0.5 degrees of droop. In frustration I ordered a new cylinder from Krale and it too had 0.5 degrees of droop.

So it looks like HW90 droop is machined into the cylinder dimensions. Not the barrel. For example, my HW95 barrel has no droop in the 95, but when I swapped it into my HW90, it had 0.5 degrees.

Here's my theory. Weihrach intentionally ships the 'iron sights' model with cylinder that provides 0.5 degrees of droop. It's a traditional thing that drops the back of the cylinder out of the way so you can see the iron sights better. For scope sight models they ship a different cylinder that removes just enough metal on the mating surface to provide exact alignment. But this is just a theory.

The Weihrauch barrel latch design is very robust and precise. I doubt that you'll ever change the alignment, no matter how much you use the gun.

Regarding that R9. I would be interested if it has droop. I have a theory that Beeman ordered their rifles without droop.

Let me add I purchased a HW95 L field pro in 177 ( they have no sights ) I had to use a droop compensating mount So I ordered a 22 barrel for it. ( this one is for sights ) Still have to use droop mount an yes my HW90 to has droop but it a sweet shooter

 

[crowski]

Good question. I'm afraid I kinda hijacked the thread already.

Check out my post on that very subject.

Tuning - HW90 barrel droop

I lucked out and was able to buy a totally trashed HW80 barrel on ebay. LOL. The guy's description sounded apologetic, he knew it was not salvageable. But it has been perfect for my purposes, so I should thank him. The issue is that both of my HW90's have barrel droop. About 0.5 degrees at the...

www.airgunnation.com

Yes, some of the Weihrauchs do have barrel droop. I don't have a full understanding of which models or years have it.

I have a HW30 and HW95 from Arizona Airguns. Both were the 'hunter' models which come with no iron sights and a scope. Both have zero barrel droop. On the other hand, I bought two new HW90's from AoA and both have exactly 0.5 degrees of droop. In frustration I ordered a new cylinder from Krale and it too had 0.5 degrees of droop.

So it looks like HW90 droop is machined into the cylinder dimensions. Not the barrel. For example, my HW95 barrel has no droop in the 95, but when I swapped it into my HW90, it had 0.5 degrees.

Here's my theory. Weihrach intentionally ships the 'iron sights' model with cylinder that provides 0.5 degrees of droop. It's a traditional thing that drops the back of the cylinder out of the way so you can see the iron sights better. For scope sight models they ship a different cylinder that removes just enough metal on the mating surface to provide exact alignment. But this is just a theory.

The Weihrauch barrel latch design is very robust and precise. I doubt that you'll ever change the alignment, no matter how much you use the gun.

Regarding that R9. I would be interested if it has droop. I have a theory that Beeman ordered their rifles without droop.

Nobody hijacked anything. I’m easy. This is so interesting.
I’m at the beginning of changing my springs and piston seals. While disassembling I will check them all for barrel drop. I have a WoodPeckers straight edge that should work perfectly. Crow