BeasleyBunch

Steve,

If you do go w/ Solo Prop it might be a good idea to order an extra blade or two at the time of purchase. They are custom made and if, down the road,you dobreak oneyou will have an extra made from the same batch...ready to go.

radial1951

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Yikes! 23x14 x4 blades!! That is some serious pitch. The EVO book only suggests a 24x12 x2 blade...

Steve, I think Tom is on the right track. The 22x10 x4 you already have seems a bit small, so the next best thing is the 24x10 x4.

Your Corsair's performance with the 22x8 3 blade @ 6500rpm is the benchmark. The EVO99 with the 24x10 4 blade might only see 5500rpm. That should / might / could equate to better performance...

(EEEK This is a tough one!)

Regards RossG
radial1951
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slskn

My Feedback: (4)

well I talked to Troy built models again, and another guy says the 23 x14 is too much, and the 24x10 will only push the plane at 50 mph when you calculate the Pitch x`s the rpm, for example 5000 rpm x 10 pitch= 50 mph, so now they say at least a 12 pitch and maybe 22 or 23 in. dia. should pull it 20 or so mph faster, or 5500 x 12 = 6600, but I think I may keep this 22x10x4 just to get the end result for the info and go from there! thanks guys I will report the findings when I get the correct fuel and give it a try, now fuel selection uuuummmmmm?...................Steve

gregquin

Hey Ross.

I have one of the UMS Seidels 7-70. I have that in a 97" Gee Bee Y from Austar Models. You will have no problems at all with the 7-77.

radial1951

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Hi Greg

That's exactly the GeeBee I was refering to. Looks great, love the telescopic wheel pants. Didn't you originally plan to put the 7-70 in a Peashooter? I looked up some of your previous posts (big brother is watching!) and downloaded your video of the first run of your 7-70. Well done. And lots of good info on fuel, glow setup etc.

Do you have a vid of the GeeBee flying? That would be good.

Thanks for your input.

Regards RossG
radial1951
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gregquin

Peashooter is still underway. But the 7-70 is not looking good for it. The cowl ring on the peashooter is considerably larger than the engine, and it just wouldn't look right. (The Peashooter has a large blanking plate covering the crankcase, with just the cylinders poking out on the full-size. The 7-70 would be hidden by this plate) and lets face it...the main reason for putting these radials into a model is for the bling, both visual and aural.
So I would need to go for a radial with almost twice the diameter of the 7-70, or a big single. and use a dummy.

I haven't got a video yet of the Gee Bee, but I am working on it.

Word of warning regards those lovely telescopic wheel pants. The wheels they supply are......ordinary...... One collapsed on me (to be fair I had modified it to take bearings), the resultant wheel wobble tore the leg out of the wing. Do as I eventually did, and buy a pair of good wheels.

Greg

cymaz

Maidened my plane with the 7-77 and Mcdaniels on board glow...that has really transformed an already great engine. The idle is supreme and transition is good. You won't be disappionted with the Mcdaniels.

radial1951

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Greg

Thanks for the info, ARFs often have low cost wheels. Plastic hubs running on plated wire axles....

Careful if you restrict airflow over the cam drive housing. The Saitos get quite hot in the nose. Because I don't like the blue painted engraving on the EVOs, looks a bit tacky to me, sorry Pete, I was going to turn up an alloy cover ring for the EVO77 until I checked the possibility of heat buildup....

Regards, RossG
radial1951
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radial1951

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Well donecymaz!We need pictures and avideo asap!

BTW,did you make the exhaust ring in the pic below? Are they the original EVO header pipes, if so how are they fixed to the main ring? What is the "container" fixed near the exhaust outlet?

Thanks.

Regards, RossG
radial1951
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cymaz

The ring is fixed to the collector ring with nuts and olives the "container" is detail from the original crop duster picture I worked off

Maxam

My Feedback: (62)

Soooooooooo, Did it fly nice?? Look good in the air? -Tom

cymaz

Flew very well....The wing ribs,spars and fuselage formers I had laser cut off plan. This ensured that everything was square straight and true. It does fly better at speed, my first ( maiden) flight I flew it too slow, understandable I suppose. The landing was too slow.

Second flight was much better. Riched the top end by 2clicks increased the glow run time and of course flew it faster. This made the control crisper and the plane respoded better. Landing was better....flew it in under power all the way, its a 24lbs plane and draggy. So she lives to fly another day.

Oh, and it hates to take off x wind and will protest by swinging about a bit, landing very x wind is a bit of a no -no as well. The parasol wing will get alot of wind under it

Maxam

My Feedback: (62)

Great, glad to hear it! These are fun engines! -Tom

cymaz

Here is the Video [link=http://youtu.be/FBnhp7x3WWQ]link[/link]

slskn

My Feedback: (4)

well I got my Keleo exhaust ring in for my 999 and what a job it was to install!!! some of the exhaust nuts did not line up with the cylinders and about 4 hours later, finally decided to call the manufacturer up and complain, but after talking to the guy, it turns out I had to loosen the cylinder flange allen heads and the intake at the top of the head, turn the cylinder jugs a degree or two to get the threads to line up, start a few threads and then realign the cylinder jugs and tighten them back down, made me a little nervous but it seemed to work! the ring itself at the joints (three piece ring) were off about a millimeter, another words not inline, but the clamps they give you brought them together with some heat resistent silicone, but once it is on it is solid. had to cut the length of the bottom tail pipe about 1/2in. below the corsair cowl, pheeeuuuwww more work than I expected but turned out nice! hoping to learn how to post pics of the Corsair.........Steve

slskn

My Feedback: (4)

well I got my Keleo exhaust ring in for my 999 and what a job it was to install!!! some of the exhaust nuts did not line up with the cylinders and about 4 hours later, finally decided to call the manufacturer up and complain, but after talking to the guy, it turns out I had to loosen the cylinder flange allen heads and the intake at the top of the head, turn the cylinder jugs a degree or two to get the threads to line up, start a few threads and then realign the cylinder jugs and tighten them back down, made me a little nervous but it seemed to work! the ring itself at the joints (three piece ring) were off about a millimeter, another words not inline, but the clamps they give you brought them together with some heat resistent silicone, but once it is on it is solid. had to cut the length of the bottom tail pipe about 1/2in. below the corsair cowl, pheeeuuuwww more work than I expected but turned out nice! hoping to learn how to post pics of the Corsair.........Steve

BeasleyBunch

Interesting... I received my 9-99 a few days ago, but haven't tried to mount it yet. The metal ring clamps they provide are bare metal inside and out... What heat resistent silicone are you speaking about? There were no instructions...just the 3 zip lock bags with the ring sections...so thanks for the heads-up on installation "procedures"!

slskn

My Feedback: (4)

I tried to assemble the exhaust ring as per the instructions, (which were simple and vaque), and it did not go as he stated, however, the 3 piece ring do not go into each other, rather they butt up to each other, and the clamp fits equally over the 3 sections and he recommends putting sillicone where the ring butts up to each other to help seal any exhaust leak, I used a automotive heat sillicone gasket type sealer, which he said will work great, so good luck setting it up!

Maxam

My Feedback: (62)

I have one of these 3 piece exhausts myself and it has many flights on it. When installing I did press internal 1/2 inch long tubes on the inside. It was a near miracle that I had brass tubing that its outside diameter was a good fit to the rings inside diameter. This ring is on my Robin Hood 99 shown elsewhere in this thread. -Tom

cymaz

Thought of trying a different prop on me evo/ums 7-77. Currently on a 24x10 but would like some more thrust , any thoughts or suggestions??

My exhaust ring came from Horizon. I loosened everthing up but it still took along time to wrestle on.

slskn

My Feedback: (4)

Great Idea Tom, I was thinking of the same thing but could not find the right dia. of tubing, but once all together it seems pretty strong.

slskn

My Feedback: (4)

just figured out how to up load pics, thus my T-28, trying to find the Corsair pics.

DamBo

Question
If I were to use oil and methanol mix without nitro.
What oil can be used?

Maxam

My Feedback: (62)

Dambo, You can just buy no nitro fuel like usual and just dilute with methanol to the correct oil%. Easy to do. -Tom

DamBo

Yes i have been doing that but why waste nitro on an engine that does mot require nitro?
I figured since it is a special mix anyway and needs to be its own seperate container.
And a quart of oil mixed with methanol would go a long way why not try it.
So, back to my question, any synthetic oil or a castor would work. How about mobil lite?
I mix it in my turbine fuel, handles heat and burns clean ?