roncoleman

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Hey I think there are more than enough old engine lover here that should love see these Black Beauties that I just
came across. Ross Engines, American made engines. Maybe someone here has a little info on these engines they
would like to share, otherwise enjoy the photos.

earlwb

I am quite partial to that Ross flat six engine myself. I actually wonder if anyone actually used the engines in a airplane. I think the vast majority of the engines sold to modellers, even way back in the 1970's and 80's probably all wound up being displayed and not used.

They have a bit of a story about the engines that Lou Ross made here http://modelenginenews.org/drj/ross4.html

There are several varieties of the flat twin. I have seen rear exhaust and side exhast versions of that engine, and having the carb towards the rear and in the middle too.

TFF

If i remember from the old Clarence Lee articles the singles ran well but were not powerful; so the pattern people were not interested,which ruled the day. When Robertson got the company, he wrote Lee saying he had spares but no new engines would be made; I guess when no one wanted spares he put the others together. I think he was hoping to protect his multi cylinder collection value when he bought the company. I also remember a twin was used in a Pober Pixie in Model Aviation by Wisher and he noted that the twin looked cool in the cowl but had the power of a .40 single.

coriolan

Here is the test result for the twin(from "Downunder"):
http://sceptreflight.net/Model%20Eng...60%20Twin.html

roncoleman

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Earlwb,

Nice photos, are these part of your collection. I always wondered what exhaust system would be use on the multi-cylinder engines.
Those exhaust stacks look kind of small, where they actually used or just for display? The 61 I posted is for sell (280 euro/$362) on
ebay.de, there were a couple others there also.

TFF,

I never read the review or use one but I always thought because of it design, that the Ross 61 might have been in the same power
range as the K&B and Super Tigre blue head PDP engines. I agree, back in the day when the 61 engine was king, the pattern guys
were the makers or breakers. Lots of guys flew or tried to fly pattern, I've never heard of Ross being used. Maybe it was good sports
engine.

roncoleman

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Coriolan,

Thanks for posting that link. Nice write up on ross twin but I'll be spending a few hours reading
all of the other reviews.

Thanks again
Ron

earlwb

Sorry they are not my engines. I sold the ones I had and wished I had some others though. But I would want to run and use them myself. So I am reluctant to get any nowadays.

Back in the 1970's mufflers weren't used all that much and the mufflers one could get weren't very good anyway. Ross baically just used exhaust stacks to get the exhaust out away from the airplane. There were some nice cast muffler adapters made for the twins and quad engines. I would have liked to known who made the cast twin in cowl muffler though.

roncoleman

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The Ross 61 was relisted and sold. See below


http://www.ebay.de/itm/ROSS-POWER-RC...vip=true&rt=nc

proptop

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That red head .61 has a K&B carb on it...is that what they came with in the later versions? I haven't looked in a while, and don't recall right off hand, but were they or are they currently sold by mecoa? (that might explain the K&B carb )

I have a very early one with natural Alum. case (sand cast )...black head, prop driver and backplate...and a Perry carb...all original.

downunder

Strangely, just a couple of days ago I added the [link=http://sceptreflight.net/Model%20Engine%20Tests/Ross%201.20%20Flat%204.html]Ross flat 4[/link] to the list .

earlwb

It is difficult to say what carb was the standard used on the engines. Ross used Kavan, and Perry  carburetors on the engines. I am not sure about K&B carbs though but he could have used them too.  I don't think that is a K&B carb on the Ross .60 Red Head though, it looks more like a Kavan carb to me.

proptop

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Definitely a K&B carb...looks identical to the carbs on the 7.5 Marine (outboard ) K&B engines on my friends boats...but most likely has a smaller throttle bore.

Edit: Just stumbled across this...
http://www.rcuniverse.com/forum/m_11518898/tm.htm

dennis

My Feedback: (90)

I owned a Ross twin prototype engine for a few years that used K&B 40 pistons so the twin was an 80 . It used a Perry carb. I like most buyers never ran it but looked at it fondly for a few years till it was time for it to move on. It was natural aluminum, no black paint.

Dennis

roncoleman

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Proptop,



I have the same engine as you with the Perry carb. Maybe the K&B card was used on the black 61 only.

roncoleman

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Hey you think that's strange, checkout post # - 9. It's not like one of these are being put up on Ebay every few months. But a few days later after my post, there it is
a black Ross 61

http://www.rcuniverse.com/forum/m_11507817/tm.htm