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Old 08-27-2019, 11:45 AM
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Engine for Dan Santich 1/4.5 P-51

So I'm starting to look for an engine for a partially finished Dan Santich P-51, 1/4.5 scale. Seems that something around 100cc is a good size, but I can't seem to find any single cylinder engines around that size. I know DLE and DA both make or made an 85cc, but that's kinda on the small end of what should power this beast. I generally prefer to be slightly overpowered than to have just enough power. Any suggestions? Twin cylinder won't work for two reasons. 1, I can't seem to find any decently priced inline twins as horizontally opposed won't work. 2. For the aforementioned reasons, I really don't want to drop $1500 on an inline twin.
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Old 08-27-2019, 11:52 AM
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Not sure but I believe you'd have to go 'old school' to find something bigger....like a 5.8 FPE, Sachs or A&M engine. They'll definitely give you 'the weight' you'll likely need up front
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Old 08-27-2019, 12:56 PM
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Actually there was one other 'larger' single cylinder motor that I personally own.... it's made by Russ Stotlz, the manufacturer of the Husky-Challenger motors. Russ made a lot of single cylinder motors, especially ones for Madera racing that ran on methanol, as well as twin inline and I believe even a triple inline. It comes with a C&H ignition specifically made for it.
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Old 08-27-2019, 12:59 PM
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ZDZ 97

https://zdzenginesusa.com/product/zdz-97rv-j-champion
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Old 08-27-2019, 01:00 PM
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Here's the twins he produced.....5.4, 6.6 and 8.8
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Old 08-27-2019, 01:01 PM
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Very nice!
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Old 08-27-2019, 05:08 PM
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A Dle 85 Should be ample, My 1/4 Don smith one calls for 95cc. Build it light and it will be fine,

If you can try and get a inline 4 stroke, Like a Roto motor you will love it

My Self im aiming for a Rotomotor 130 inline 3 cylinder. Sounds amazing.
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Old 08-27-2019, 05:16 PM
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I was looking at a DLE 85, just wasn't sure. I do love the sound of the inline twins though
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Old 08-27-2019, 05:29 PM
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What do you project the flying weight to be? What diameter spinner?

The old Quadra Q100 might be another candidate. I don’t feel very comfortable recommending any of the old big singles because even though they can run and perform well, they all shake the hell out of an airframe.

If you could make the DLE 85 work they run quite well with reasonable vibration. You’re probably looking at a 26 - 27” prop max diameter though.
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Old 08-27-2019, 05:37 PM
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Honestly I'm not too sure yet. I bought the plane as it sits, the fuse is 3/4 finished and glassed, the wings are almost finished, they just need the control surfaces mounted up and then have all the servos and linkages installed. Still gotta make a rudder for it. I'm guessing probably 30 lbs or so?
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Old 08-27-2019, 08:57 PM
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This motor runs its balls off for a very reasonable price!

http://www.goldenskiesrc.com/Product...%20Engine.html
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Old 08-27-2019, 09:03 PM
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The zdz 97
Probably the smoothest single cylinder 28x12 prop capability
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Old 08-27-2019, 09:07 PM
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Another thing to think about with a single, is that you may have an issue were the head or the spark plug cap may foul or need to exit the Cowl.

Twins normally dont have much of and issue due to being smaller cylinders.

Prop shaft ext is the solution tho.
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Old 08-28-2019, 09:45 AM
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A DLE 85 pulls my 45 pound Comp ARF P-51 with no problems. Still playing with various pitch props to see which one matches my style of flying. There are a couple of club members that think it does not have enough power but it flies in a very scale manner at 1/2 and 3/4 throttle.
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Old 08-28-2019, 10:15 AM
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Quote:
Originally Posted by Assocracer View Post
So I'm starting to look for an engine for a partially finished Dan Santich P-51, 1/4.5 scale. Seems that something around 100cc is a good size, but I can't seem to find any single cylinder engines around that size. I know DLE and DA both make or made an 85cc, but that's kinda on the small end of what should power this beast. I generally prefer to be slightly overpowered than to have just enough power. Any suggestions? Twin cylinder won't work for two reasons. 1, I can't seem to find any decently priced inline twins as horizontally opposed won't work. 2. For the aforementioned reasons, I really don't want to drop $1500 on an inline twin.
I have a zdz 90 with less than 10 flights, pitts muffler I would sell for a fair price...pm me if interested, the zdz is smooth and powerful! I also have a sachs 5.8 only ground run I would sell
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