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Cox Engine of The Month
April-2024
OVERLORD's

"Kress ducted fan with new Cox Conquest 15 RC"



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Post  Cox45 Sun Apr 11, 2021 7:40 am

Bonjour,
Je vous présente le " HB 15 " de Graupner, avec carburateur Perry.

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Moteur qui va équiper le Piper Cub PA 18, également de chez Graupner
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Post  Ken Cook Sun Apr 11, 2021 7:48 am

I really like the HB engine line. High quality engines. I run a .40 on a Italian high wing r/c plane. The .40 I own is the non PDP version but it runs well and will more than likely outlast me.
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Post  Cox45 Sun Apr 11, 2021 10:13 am

Bonjour Ken Cook,
Je vais voir, car je connais mal cette marque de moteurs, car je suis plutôt OS, en H.B, je possède le 12, 15, 20, 25, 50 et le 61
Voici le lien vers la page de mon blog sur le H.B 61 >>>ICI<<<
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Post  Marleysky Sun Apr 11, 2021 10:18 am

Cox45 wrote:Bonjour Ken Cook,
Je vais voir, car je connais mal cette marque de moteurs, car je suis plutôt OS, en H.B, je possède le 12, 15, 20, 25, 50 et le 61
Voici le lien vers la page de mon blog sur le H.B 61 >>>ICI<<<
@+Christian


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Post  Cox45 Sun Apr 11, 2021 10:23 am

Okay, I have to put all my messages in English! Very Happy Because for my part, I have the instant translation from English to French !
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Post  Surfer_kris Sun Apr 11, 2021 11:29 am

Yes, these are very nice engines. The .12 is not the most powerful though, and their .15 engine has the same weight while being able to pull an 8x4 prop.

The firewall mount is a nice feature that saves a some weight too.

Some people have added a fuel pressure fitting to the muffler, but I have never seen the need for it, the Perry carbs have a very good fuel draw as it is.

Short bench-run of the HB .12 here:

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Post  Cox45 Sun Apr 11, 2021 11:57 am

Ok and thanks for the advice, and your engine the HB 12 works great ! Thumbs Up
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Post  roddie Sun Apr 11, 2021 12:04 pm

Nice running little engine Kris. Thumbs Up
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Post  Ken Cook Sun Apr 11, 2021 6:14 pm

Kris that .12 certainly seems happy. MY HB .40 is a Dykes ringed engine and I always wondered what the other variants were. In a recent post you mentioned the Webra .12 speedy. I happen to own that Webra and it's somewhat of a rarity. I think the price scared away most but it too offers good performance for a .12.
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Post  Surfer_kris Mon Apr 12, 2021 12:25 am

Yes, the webra .12 engines were quite pricy at the time I have only been able to find a few of them much later. With the stock muffler, which looks a bit like the Cox Conquest muffler, they make for nice sports engines.

They need a fairly small prop to run well on the pipe. I've been getting close to 22000rpm on the APC 6.3x4 prop and 10% nitro. I've also found a half-built "Piranha" the plane that Webra designed around the engine, but I haven't gotten around to finishing it yet....

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Post  Cox45 Mon Apr 12, 2021 1:19 am

Nice model, and quite rare! Thumbs Up
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Post  getback Mon Apr 12, 2021 9:04 am

Nice run on the .12 , i think all the Webra engines are pretty expensive , but i have not ran or own one and hear good things about them . This Site Rocks!
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