Pete Bergstrom

Very nice! What size prop are you running?

Pete

Edhamp

HI Pete,

Ive been using a 26x12 3 blade Mejzlik for running in and testing (see posts 165-168) which gives 6000rpm on the ground and easily moves the 50lb model around on the ground as if it were fitted with a 100cc plus 2 stroke. I have a 26x14 3 blade to try next but its a Biella and the hub is a bit too thick for the prop shaft compared to the slimmer Mejzlik,, hence my interest in extensions. If I get around 5000 rpm plus with this prop then it should work well in the air.

cheers

ed

Pete Bergstrom

I think you'll easily get 5000 rpm out of it. According to Pe's chart you'll likely see 56-5800 rpm. Sounds like fun!!

Pete

Maxam

My Feedback: (62)

Ed you must try a 28x14!! The pitch will get that plane moving and give you good flight characteristics at part throttle settings, most impressive plane. -Tom
Oh Ed sorry I see you were using a 3 blade which of course looks much better than a 2 blade. I am sure a 3 blade 28x14 would be too much for this engine! I am with you on Corsairs. I have a 91 inch BH models corsair with an older glow evo 7-70 swinging a xoar 3 blade 22x10 warbird style prop. This plane is quite light at only around 20 pounds. It is a joy to fly! Have you flown yours yet? My experience with Corsairs has shown pleasant flying characteristics. Forgetting appearance though the 28x14 2 blade would be impressive. The Fiala props from Vogelsang Aeroscale perform well. The same source has I believe a good three blade from SEP and fiala. Problem is they are 24x17 or 18. They may look a bit silly small around that cowl. Anyway you might be interested in checking them out. -Tom

Edhamp

Hi Tom
Thanks a lot for the tips. If the three bladers I am trying do not work out in the air then the 28x14 2 blade will be the way to go next but it will not look right!!. However, based on ground performance there seems to be plenty of pull there and we know that these engines seem to be able to deliver the power. I used to fly the large old Royal Marutaka Corsair which was a joy too and came it at about 35lb so I hope I do OK with this. Maiden flight is scheduled next month with the LMA certification guy present. I hope to report on it as soon as I can on my other thread detailing the model (see earlier posts for link).

cheers
Ed

mango12

35 LBS and you have to get LMA certification?

reyn3545

Great info on these engines.. thanks to all for sharing. I'm looking for the right plane to mate up to the 160, preferably an ARF, but the options seem few.

I like the Beast, I used to fly a Waco with a Saito 450... way too much power for a flat-bottom wing. So the Beast may be an option. I guess any other 120 - 50cc sized Yak would work, but then I'd wind up with an aerobatic plane that would fly like a warbird. I like the looks of warbirds, but don't have the time/energy to invest in building one right.

Maxam

My Feedback: (62)

Reyn, If you refer to posts 96, 141 and 152, they are on the 160 in my H9 Beast. It was a near perfect combination. All batteries could be located in the tail so I did not have to add any tail weight. Post 171 shows the same engine in a Yak 55 SP, 37%. The 160 in the Beast was solid with strong upwind performance. The Beast is a fine flier and would slow way down on landing. All up weight was 30 pounds. The right thrust was removed so that the rockers on the left side facing forward would clear the cowl. What a fun plane engine combo. -Tom

The Beast assembles fast at the field and is quite compact when taken apart. Other details in the posts.

reyn3545

Yep.. I've read through most of the posts... I think a radial should ideally go in either a warbird or a biplane of some sort.... and the Beast would make a great match.

Maxam

My Feedback: (62)

Reyn, Someone at Horizon did the same combo and had a custom painter brush on a very fancy beast. It was displayed at the Toledo show. They did not put in the cooling vents on their plane like I did. I wonder if the cooling was plenty in that plane . My engine ran very cool with those vents I put in, which was actually hard work. -Tom

reyn3545

Yes, I noticed your vents... very nice work. I would expect that if you had enough flow out the bottom of the cowl, it should be fine, maybe some duct work inside the cowl to force air around and down. I keep thinking about options... none of them cheap!

Edhamp

Hi Scott, Just to clarify the 35lbs referred to my old Marutaka Corsair. The CARF version here with the EVO160 came out at 50lb. The UK CAA limit is 20Kg dry.

Post 263 implies something is in the planning from Horizon to suit these engines.
Cheers
Ed

reyn3545

Pete... are there any pictures and/or dimensions for the mounting plate on the 160 engine? I'm trying to decide between 2 different planes to fit it on, and the mounts could make a key difference.

heraldoboldrin

guys, in a Sterman with evo 260 how big has to be the fuel tank to fly 10 minutes?

Maxam

My Feedback: (62)

Herald, According to the instructions the 260 will use 1.75 oz or 50 ml/minute. They do not specify if that is an average or full throttle. Lets say 2 oz/minute so with reserve 24 oz tank would be minimal size to use. -Tom

Pete Bergstrom

I'm traveling right now but when I get back to the office on Tuesday I'll get this info for you.

Pete

reyn3545

No need.. someone else provided it in another thread... Extenal diameter 6", internal diameter 4".

I think this is going to be a fun project!

Maxam

My Feedback: (62)

Have any of you been to Oshkosh Air Venture? Well all you radial lovers, this may be the year to go. The radial engine is featured this year. If you have never been it is a real treat even if you are not a full size owner. You can stay cheaply at the nearby university in the dorms. A visit to Oshkosh can be very motivating to build a scale plane with a radial. -Tom

Pete Bergstrom

Tom - Are you going this year?

Pete

Maxam

My Feedback: (62)

Absolutly! For three days, Tuesday through Thursday.

F4u5

My Feedback: (81)

So, do I buy this radial or a Moki 250? I like the 7 cylinder layout and the price.

JQ

jspauld2

Do you want a biased answer?

F4u5

My Feedback: (81)

Ha, sure. I am actually leaning toward the Evo 7 cyl for the looks and price. I just have not heard much feedback on them such as I have heard on the Moki's.

Any insight you have to the Evo 7 cyl is welcome, biased or not[8D]

JQ

jspauld2

Well all Ican tell you is this: it looks great, sounds great, runs great, has great power and is backed by great service.

Again, this is only my opinion, but if you're in the market for a 7-cylinder radial this is a great option for a great price.

But don't base your decision off a Horizon employee's opinion. I'll let others answer your question more unbiased.

Thanks,
Jimmy

mango12

Hi Guys,
I have not mounted my EVO 260 in an airframe yet, but I can say this. On the bench, this engine runs fantastic !! I have ran mine about six times now and am awestruck every time it fires up, so is everyone else at the field. I have ran mine "straight out of the box". It has developed a few leaks around the collecter ring, but as I said, I have not put a single tool on the engine yet. Before it goes in my 33% Waco, all adjustments will be made as well as tightening every nut and bolt on the engine and collecter ring. This thing sounds like a hot rod !! It does take a while to get fuel to the engine on the first run of the day, but it hand starts easily after that. The best way to start it the first time is to put an electric starter on it with the choke closed. goose the throttle till it hits, and open the choke. One thing that takes getting used to is the fact that the compression stroke is in seven different places, so it does not matter what orientation you mount the prop in. It can hit compression anywhere. I was a bit concerned at first that the prop is mounted with only one nut (on the crankshaft) but the small keeper ring on the crank will keep the prop from coming off,sure beats all of the bolts on my DLE 170 !!!
Final word...... Buy it, you'll love it !!!
BTW- I have got more work completed on my Waco in the past couple of months (since I got the EVO ) than I did in the prior five months. Can't wait to get her in the air !!!!