Sopwith Pup Kit Prototype

AeroClassics · 9 March 2007, 10:05 PM

Quote:

Originally Posted by Mode One

Chris, I have had an opportunity to completely review your plans for your 1/5th scale Sopwith Pup that you sent to me and feel they are extremely well done, thorough and executed with a very high degree of common-sense. I really appreciate these features in a plan. I would think a .80 to 1.00 C.I. displacement 4 stroke to be adequate power and certainly a 1.20 would be more then ample.

Wow! I would HOPE a 1.20 would pull a 1/5 Pup around! The 1/4 BUSA flies on a 1.20 and based on what I saw earlier in this thread it is overbuilt by comparison. I would think that a properly built 1/5 Pup should fly in a true scale manner with a .80 and would probably be exceptional with a .91! The .100 would be insurance.

Just MHO!

Doug

11 March 2007, 06:21 AM

Aeroclassics, I agree with you! I'm unsure where you live. I live in the US and the US is "Nutso" for power! Have you ever heard of "Tim the Toolman", "MORE POWER", Aargh, Aargh!!? Surely someone will build this airplane and install a 1.20 for power, so they can Hover and Harrier!

As I felt Chris would like me to review the plans he sent me, this is what I have done. My personal choice for power would be to install a .90 to 1.00 four stroke in this airplane and expect it to perform fantastically. I would expect it to run out of power at some point in a vertical up line far exceeding what the real Sopwith Pup could do. This increase in power should give the airplane a margin of safety on landing approach should the flyer get behind the power curve.

Power choices are very individual and many times made by what the flyer has available. If a guy wanted to stick a 1.20 up front, I would maybe consider some beef-up to the nose of the airplane and be judicious about power application.

I haven't seen the plans for the 1/6th scale Sopwith Pup kit, which Chris has in production, so can't comment on the difference between the two designs! However, I like what he has drawn for this plan and feel it will be both fun to build and fly!

AeroClassics · 12 March 2007, 07:59 PM

Quote:

Originally Posted by Mode One

Aeroclassics, I agree with you! I'm unsure where you live. I live in the US and the US is "Nutso" for power! Have you ever heard of "Tim the Toolman", "MORE POWER", Aargh, Aargh!!? Surely someone will build this airplane and install a 1.20 for power, so they can Hover and Harrier!

As I felt Chris would like me to review the plans he sent me, this is what I have done. My personal choice for power would be to install a .90 to 1.00 four stroke in this airplane and expect it to perform fantastically. I would expect it to run out of power at some point in a vertical up line far exceeding what the real Sopwith Pup could do. This increase in power should give the airplane a margin of safety on landing approach should the flyer get behind the power curve.

I too live in the US. North Texas to be exact. And yes there is no question most fliers here are power hungry! The bigger the motor the better! The old "you can always throttle back" is what you hear. While I do not generally agree with this......well actually I don't agree with this. You are right, somebody is going to stick a 1.20 4c in. They get what they deserve, in my opinion! One of the problems, IMHO, with kit and ARF makers today is they have to allow for the folks who would grossly overpower an aircraft. Plans makers don't. I think it may be a case of liability.

I agree that a .91 4c or the new Saito 1.00 4c would be perfect for this airframe. One of them would be my choice!

Doug

10 April 2007, 02:46 PM

Aeroclassics have you seen Chris' plans for the 1/5th version? Also a continuing thread on his 1/6th Pup exists at R/CU and you should visit there too. He is discussing rigging at this time.

Breguet · 10 April 2007, 03:33 PM

Quote:

Originally Posted by Mode One

Aeroclassics have you seen Chris' plans for the 1/5th version? Also a continuing thread on his 1/6th Pup exists at R/CU and you should visit there too. He is discussing rigging at this time.

Could you post a link or say where I'd find it please

!

10 April 2007, 06:28 PM

It's in the Scale topic at R/CU's forum

CTDavies · 11 April 2007, 03:05 AM

Quote:

Originally Posted by Breguet

Could you post a link or say where I'd find it please

!

Hi Breguet, maybe this works

http://www.rcuniverse.com/forum/m_4683600/tm.htm

Breguet · 11 April 2007, 02:15 PM

It certainly does - thanks muchly!

CTDavies · 14 April 2007, 11:28 AM

Ok everyone,
quick update on the Pup. Those of you that frequently visit rcuniverse will have already seen our cool cowlings, but these shots include the rigging as well, well most of anyway. We still need to do the front dual flying wires, which won't take too long, we hope, then a few glamour shots for the webpage and box tops and after that we start covering! So check back in a few weeks, by then she might look a lot different.

CTDavies · 2 May 2007, 09:28 AM

Although I've already posted it over at RCUniverse, I'll post it here again. This first of a batch of glamour shots the local photographer is doing for me. I hope to get some more tomorrow.

I wanted to have some nice shots of it fully rigged but still without covering. Some of the rigging will have to be removed again for covering but this shows the structure very nicely.