I'm assuming yall are running CS props with these 320's? If so, I'm guessing I could use the same CS prop that is recommended for the RV-6/-7? Just in case...
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| Project with main wing bolts already drilled http://thorp18.com/thorpforum/viewtopic.php?f=36&t=7954 |
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| Author: | leewwalton [ Tue Aug 25, 2020 3:10 pm ] |
| Post subject: | Re: Project with main wing bolts already drilled |
No an angle valve motor is not a good idea ... does not fit, heavy, cowl ends up looking either really fat or just plane strange |
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| Author: | Ryan Allen [ Tue Aug 25, 2020 4:25 pm ] |
| Post subject: | Re: Project with main wing bolts already drilled |
Whew...I'm looking at an angle valve. Glad I asked. Thank you. |
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| Author: | Hagle347 [ Tue Aug 25, 2020 6:22 pm ] |
| Post subject: | Re: Project with main wing bolts already drilled |
Hey Ryan, there’s quite a number of Thorps out there with o-360’s. The stock 360 has more torque than an 0-320, however....I went with a IO-320, it’s lighter than the O-360 which means you typically won’t require lead in the aft fuselage for proper weight and balance. ( my dad’s Thorp had 13 lbs) And if one were to go with bigger compression ratio pistons, you could get close to the 180 hp number with less weight. I went with 9:1 and am showing about 178hp. There’s a bunch of 0-320 guys with 10:1. I know you’ll find the right balance for your airplane. |
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| Author: | leewwalton [ Tue Aug 25, 2020 7:36 pm ] |
| Post subject: | Re: Project with main wing bolts already drilled |
Terry he's talking about an angle valve motor ... not recommended! |
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| Author: | Hagle347 [ Tue Aug 25, 2020 7:56 pm ] |
| Post subject: | Re: Project with main wing bolts already drilled |
Guess I didn’t do a good job of explaining those as options.... |
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| Author: | leewwalton [ Tue Aug 25, 2020 9:51 pm ] |
| Post subject: | Re: Project with main wing bolts already drilled |
I believe Ryan’s flying Thorp has an 0-360. Ryan you can as Terry pointed out tweak any of these motors .. I have a parallel valve 0-360 that’s rated at 217 hp on Wendells plane in my garage. I will say that hp on a 1000 lb Thorp is quite the ride. |
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| Author: | Ryan Allen [ Wed Aug 26, 2020 6:08 am ] |
| Post subject: | Re: Project with main wing bolts already drilled |
That's all very good info. I appreciate it. I do have a 180hp 0-360 on my flying Thorp, but I did not know if a 200hp 0-360 was different, and I'm glad I asked. As a novice builder, I want to stay away from anything that will cause me to have to modify anything. I do want an 0-360 for this project, but would consider an 0-320 under the right circumstances. |
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| Author: | James Grahn [ Wed Aug 26, 2020 6:50 pm ] |
| Post subject: | Re: Project with main wing bolts already drilled |
I think the (I)O-320 is the perfect motor for a Thorp. It is lighter (as Retired Terry said) and can be pretty powerful. I have a 192HP IO-320 waiting for the weather to cool off so I can install it. Light means fast. Cubes |
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| Author: | Ryan Allen [ Wed Aug 26, 2020 7:10 pm ] |
| Post subject: | Re: Project with main wing bolts already drilled |
I'm assuming yall are running CS props with these 320's? If so, I'm guessing I could use the same CS prop that is recommended for the RV-6/-7? Just in case...
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| Author: | James Grahn [ Thu Aug 27, 2020 12:52 pm ] |
| Post subject: | Re: Project with main wing bolts already drilled |
Not sure what they use. I can find out. We have a set of props that Hartzell makes for us. They can be slightly modified with scimitar blades. Incidentally, this modification eliminates the rpm avoidance band. If you would like a new Hartzell, let me know. I am a dealer and can beat most prices including Vans. Cubes |
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| Author: | Jeff J [ Thu Aug 27, 2020 2:04 pm ] |
| Post subject: | Re: Project with main wing bolts already drilled |
I am running a fixed pitch wood prop on my O-320. Newer constant speed props may be better but my experience with metal CSP on other airframes suggests a person is better off without the extra weight. It does depend some on what a person wants to do with the airplane. |
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| Author: | Ryan Allen [ Sun Sep 06, 2020 9:31 am ] |
| Post subject: | Master Cylinder on Firewall |
I am trying to decide whether to use a brake master cylinder on my firewall, or use the all in one unit at the pedals. I have the all in one units on my flying T18. I refill the brake fluid by loosening a fitting by the wheels. A master cylinder reservoir on the firewall seems much easier to refill. Is there a reason I would want to use the all in one unit over the firewall mounted brake fluid reservoir? |
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| Author: | jrevens [ Mon Sep 07, 2020 10:26 am ] |
| Post subject: | Re: Project with main wing bolts already drilled |
Hi Ryan, The only disadvantage I can see to using a remote reservoir is the additional tubing and fittings... things get a little more “busy” around the cylinders & pedals. Also have to penetrate the firewall & have a spot to mount the reservoir. The simplicity of the built-in reservoirs is nice, but they can be a PIA to check & fill, especially in an airplane like the T-18. |
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| Author: | Ryan Allen [ Mon Sep 07, 2020 5:33 pm ] |
| Post subject: | Re: Project with main wing bolts already drilled |
thanks John. Since those are the issues, I'm thinking I'll put in the reservoir. I like to make things easy to maintain where I can. |
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| Author: | Ryan Allen [ Sat Oct 31, 2020 8:06 am ] |
| Post subject: | Re: Project with main wing bolts already drilled |
Just to save myself some possible aggravation later, I wanted to ask if this is the proper order of installation for attaching the axle/wheel pant bracket/brake torque plate to the landing gear. I attached a photo showing what I think is the correct order of installation. Attachment: Resized_20201031_075605.jpeg [ 345.88 KiB | Viewed 6651 times ] |
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