Author Topic: Who makes this engine? (Read 3547 times)

RogerGreene · « **on:** June 08, 2014, 07:25:46 PM »

I was give two of these engines and I do not know where they are from. I know that they are .25 displacement, and I can turn them over without a prop, so they are quite used up. So I'll use more castor oil in the fuel. But does anyone know who made these engines. The were on two old well used trainer R/C planes.

Thanks.

Roger

Sorry about that Windows 8.2 and firewalls .....

john e. holliday · « **Reply #1 on:** June 08, 2014, 07:38:50 PM »

Steve Helmick · « **Reply #2 on:** June 08, 2014, 07:40:23 PM »

I thought I knew, but was wrong. IDK.

Steve

Douglas Ames · « **Reply #3 on:** June 08, 2014, 07:40:49 PM »

A picture would help.

Gerald Arana · « **Reply #4 on:** June 08, 2014, 07:50:58 PM »

Well, I think they are worth a "Dollar-two-eighty"!

Jerry

Bruce Hautamaki · « **Reply #5 on:** June 08, 2014, 08:23:30 PM »

It is an HB .25 by Hirtenburger. Might have miss spelled that but that is what it is. They are good running engines.

Curare · « **Reply #6 on:** June 08, 2014, 08:34:39 PM »

Yep, it's a Hurtenburger knuckleshaver

Edit: no it's not. see below.

Steve_Pollock · « **Reply #7 on:** June 08, 2014, 08:39:41 PM »

Roger, the engines are HB (Helmut Bernhardt) from Germany, not HP (Hirtenberger Patronenfabrik) from Austria. MECOA owns the HB tools and parts, and they may still have some in stock.

55chevr · « **Reply #8 on:** June 08, 2014, 09:00:07 PM »

Is that a dykes ring motor?

Steve Helmick · « **Reply #9 on:** June 08, 2014, 09:01:33 PM »

Quote from: Stephen_Pollock on June 08, 2014, 08:39:41 PM

Roger, the engines are HB (Helmut Bernhardt) from Germany, not HP (Hirtenberger Patronenfabrik) from Austria. MECOA owns the HB tools and parts, and they may still have some in stock.

Winner, winner, chicken dinner! The picture was a big help, I bet. Unfair advantage!

Steve

Mark Scarborough · « **Reply #10 on:** June 08, 2014, 09:09:13 PM »

Quote from: Steve Helmick on June 08, 2014, 09:01:33 PM

Winner, winner, chicken dinner! The picture was a big help, I bet. Unfair advantage! Steve

well of course pictures help,, expecially since it says HB on the case,, Heck I might have even figured that out with pictures LOL

Steve_Pollock · « **Reply #11 on:** June 08, 2014, 09:10:43 PM »

Yes, the .25 is a Dykes-ring engine.

Steve Helmick · « **Reply #12 on:** June 08, 2014, 09:14:46 PM »

If it's a Dykes ringed engine, check with Frank Bowman in the Vendor's list of forums.

Steve

RogerGreene · « **Reply #13 on:** June 08, 2014, 10:07:02 PM »

Thanks guys. So its a HP made in Germany I can see the HP in the logo. I took the muffler off and I don't see a ring on the piston.

Randy Cuberly · « **Reply #14 on:** June 08, 2014, 10:45:43 PM »

I would also mention that since it is a Dykes ring engine it will not exibit full compression when turned over by hand. The dykes ring principle requires significant pressure from above the piston (as in combustion or being moved very fat against compression as in flipping a prop) to expand the ring into a tight fit with the cylinder and seal compression. The purpose is to reduce ring friction on the up stroke below the cylinder ports and there by reducing wear and increasing efficiency.
The engines may need new rings but the defacto test of turning them over by hand proves nothing with a dykes ring piston!

Randy Cuberly

Dan McEntee · « **Reply #15 on:** June 09, 2014, 12:51:23 AM »

Quote from: RogerGreene on June 08, 2014, 10:07:02 PM

Thanks guys. So its a HP made in Germany I can see the HP in the logo. I took the muffler off and I don't see a ring on the piston.

No, it's a HB engine. It does get confusing sometimes. As Randy C said, if the engine is dry, you may not feel any compression by turning it over. Put a prop on it and a few drops of oil in the exhaust and flip it through to get a feel for what kind of pop it has. And you are correct about adding some castor to the mix to help out the compression.
Good luck with it,
Dan McEntee

55chevr · « **Reply #16 on:** June 09, 2014, 03:56:40 AM »

Dykes ringed engines are hard to hand start .... best way I have found is an electric starter.

RogerGreene · « **Reply #17 on:** June 09, 2014, 06:27:00 AM »

Oops my boo, it's an HB engine. I put a few drops of Bostitch pneumatic tool lubricant and a prop and flipped the prop. It has a nice sound while flipping the prop. Now gotta put it in a plane when the weather gets better.

Thanks guys very much appreciated,

Roger

John Stiles · « **Reply #18 on:** June 09, 2014, 06:50:10 AM »

I had an HB .20BB years ago, and ran it with pen-bladders...that thing was wicked fast on 65' lines. I had it in a scratch built jet I designed that had a 20" WS and was less than 20" long....that's about as fast as I've ever wanted to fly C/L.

Gerald Arana · « **Reply #19 on:** June 09, 2014, 09:32:15 AM »

Rodger,

Now with a picture, it is worth $30-40 on the Bay. I could only find two in the completed auctions. One didn't have a carb and the other one didn't have a muffler. Also the Dykes ring is at the very top of the piston and hard to see.

Good luck, Jerry

RogerGreene · « **Reply #20 on:** June 09, 2014, 10:17:09 AM »

Each have a muffler and the carb.

I wonder how good these engines are for stunt... I will have to make a venture or just use the carb full open.

Roger

Randy Cuberly · « **Reply #21 on:** June 09, 2014, 12:09:26 PM »

Quote from: RogerGreene on June 09, 2014, 10:17:09 AM

Each have a muffler and the carb.

I wonder how good these engines are for stunt... I will have to make a venture or just use the carb full open.

Roger

Not so good for stunt without very careful set up and probably not worth the effort. There are a lot of good 25 size inexpensive engines that are much better for stunt and much lighter...
The HB engines are ported for a steep power curve and a relatively narrow power band...in other words...they make very good power at high rpm and not much below that.
This is rather contrary to what makes a good stunt engine.

Randy Cuberly

Randy Cuberly

John Stiles · « **Reply #22 on:** June 09, 2014, 03:21:21 PM »

Quote from: Randy Cuberly on June 09, 2014, 12:09:26 PM

Not so good for stunt The HB engines are ported for a steep power curve and a relatively narrow power band...in other words...they make very good power at high rpm .......

Randy Cuberly

This is pretty much what I discovered about the .20; after my R/C buddy crashed my little jet, I put it on a Ringmaster Jr. and regular tank setup...it flew well, but not very stunt-worthy. I traded it off plane and all for a fox .35!