ORION X-tremecomposite
05-22-2014, 01:34 AM
#3
Hi,
This is another model featuring an abrupt rise on the top nose section.
QQ was the first that I've seen do this on his Splendor EP and now the feature seems to be popping all over the place.
If made big enough it could be useful in terms of creating a high cooling air intake area , but if its to increase frontal side area I can think of nicer and more effective ways to do that.
It is not a feature that I would like a lot, though the cooling intake on the Galactic top nose section is not exactly the prettiest I've seen either.
Good to see mere options being available though.
Brian
This is another model featuring an abrupt rise on the top nose section.
QQ was the first that I've seen do this on his Splendor EP and now the feature seems to be popping all over the place.
If made big enough it could be useful in terms of creating a high cooling air intake area , but if its to increase frontal side area I can think of nicer and more effective ways to do that.
It is not a feature that I would like a lot, though the cooling intake on the Galactic top nose section is not exactly the prettiest I've seen either.
Good to see mere options being available though.
Brian
Last edited by serious power; 05-22-2014 at 01:41 AM.
05-22-2014, 08:05 AM
#5
LOL REALLY! 
may be you forgot the lowly 2000 Quest , or the Shinden , Shark ,Valiant, Allure , Alferma?
http://www.rcuniverse.com/forum/rc-p...an-hebert.html
This is the most copied nose in pattern today , which i`m partial to, the" V "vent cut outs are pretty much standard pattern art now from seba to china !
I also see he has a strake LOL
The raised vent nose feature is for one reason only, and so far you have not guessed it keep trying tho,
Bryan
may be you forgot the lowly 2000 Quest , or the Shinden , Shark ,Valiant, Allure , Alferma?http://www.rcuniverse.com/forum/rc-p...an-hebert.html
This is the most copied nose in pattern today , which i`m partial to, the" V "vent cut outs are pretty much standard pattern art now from seba to china !
I also see he has a strake LOL
The raised vent nose feature is for one reason only, and so far you have not guessed it keep trying tho,
Bryan
Last edited by flyncajun; 05-22-2014 at 10:44 AM.
05-22-2014, 10:34 AM
#7
Ha Ha , Well you probably won`t like the Allure nose then , It`s being made by the same factory as the Orion ,, In fact ,you might get the Orion and the Allure nose confused, Maybe they did as well !
The reason I started the high nose line was to be able to move the canopy profile taller and still have the line flow from the spinner. It became a nice place for a vent, However it does not intake any air, it actually is an air escape on a glow model. lower incoming Air hits the firewall and exits out of the top vents. But it`s my signature look so I keep it for style only.
It`s been copied since the Quest and I think the highest form of flattery !
Bryan
, It`s being made by the same factory as the Orion ,, In fact ,you might get the Orion and the Allure nose confused, Maybe they did as well ! The reason I started the high nose line was to be able to move the canopy profile taller and still have the line flow from the spinner. It became a nice place for a vent, However it does not intake any air, it actually is an air escape on a glow model. lower incoming Air hits the firewall and exits out of the top vents. But it`s my signature look so I keep it for style only.
It`s been copied since the Quest and I think the highest form of flattery !
Bryan
05-24-2014, 01:15 AM
#8
Hi Bryan,
Quote; -
' However it does not intake any air, it actually is an air escape on a glow model. lower incoming Air hits the firewall and exits out of the top vents.'
That's a little surprising !!
I'd have thought that the compressed air leaving the prop would have made that difficult.
Brian
Quote; -
' However it does not intake any air, it actually is an air escape on a glow model. lower incoming Air hits the firewall and exits out of the top vents.'
That's a little surprising !!
I'd have thought that the compressed air leaving the prop would have made that difficult.
Brian
Last edited by serious power; 05-24-2014 at 09:51 AM.
05-24-2014, 08:56 AM
#9
Senior Member
Hi Bryan,
' However it does not intake any air, it actually is an air escape on a glow model. lower incoming Air hits the firewall and exits out of the top vents.'
That's a little surprising !!
I'd have thought that the compressed air leaving the prop would have made that difficult.
Brian
' However it does not intake any air, it actually is an air escape on a glow model. lower incoming Air hits the firewall and exits out of the top vents.'
That's a little surprising !!
I'd have thought that the compressed air leaving the prop would have made that difficult.
Brian
Brian are you referring to the Nostrils? It depends...it is pressure dependent as you hinted at. If the pressure in the engine compartment is higher than ambient, well, you know how that would work. To make certain they'd work as desired, hooding the exits will accomplish the goal. Hoods will reduce local pressure and draw the air out.
Around 2000 or 2001 I installed a set of nostrils on my Alliance (by CPLR). On my set-up they were designed to bring cool ambient air to the carb (rear intake). Worked well enough but I can't say it worked better or worse than the more typical arrangement. It was and is a cool feature. And as we all long timers know, many will see, few will understand.
Last edited by MTK; 05-24-2014 at 09:04 AM.
05-24-2014, 09:59 AM
#10
Hi Matt,
Yes the 'nostrils'.
Note; The first sentence in my post is a quote from Bryan's post.
Difficult to understand how air would exit there as I'd have thought that the pressure there would be just as high as just below the spinner. One would expect the highest compression just behind the prop !!?
Brian
Yes the 'nostrils'.
Note; The first sentence in my post is a quote from Bryan's post.
Difficult to understand how air would exit there as I'd have thought that the pressure there would be just as high as just below the spinner. One would expect the highest compression just behind the prop !!?
Brian
05-25-2014, 09:50 PM
#11
"Hi Matt,
Yes the 'nostrils'.
Note; The first sentence in my post is a quote from Bryan's post.
Difficult to understand how air would exit there as I'd have thought that the pressure there would be just as high as just below the spinner. One would expect the highest compression just behind the prop !!?"
Brian I Thought the same It`s why I put them there ,But I experimented with these on the Quest and Shinden with a IR heat gun in 50Deg weather and to my surprise they were warmer than the rear exits , either flying or static run up. On the Alferma, I had Ducting in the fuse through the upper firewall that exited in front of the top wing on top the nose, it was a free flow from the nostril Vents , Those worked Perfectly. Tested the same way in colder weather.
Matt I still Have pictures, of you taking pictures of the Quest in Ft Walton Beach the first year I flew it, we were both flying two strokes back then!
Bryan
Yes the 'nostrils'.
Note; The first sentence in my post is a quote from Bryan's post.
Difficult to understand how air would exit there as I'd have thought that the pressure there would be just as high as just below the spinner. One would expect the highest compression just behind the prop !!?"
Brian I Thought the same It`s why I put them there ,But I experimented with these on the Quest and Shinden with a IR heat gun in 50Deg weather and to my surprise they were warmer than the rear exits , either flying or static run up. On the Alferma, I had Ducting in the fuse through the upper firewall that exited in front of the top wing on top the nose, it was a free flow from the nostril Vents , Those worked Perfectly. Tested the same way in colder weather.
Matt I still Have pictures, of you taking pictures of the Quest in Ft Walton Beach the first year I flew it, we were both flying two strokes back then!
Bryan
05-27-2014, 05:58 AM
#12
Senior Member
Two stokes, yes. I flew the Webra 145 early on in Alliance. It was a very good combo.
I really wished I had back then today's OS GT33. The power difference between the piped GT33 and the old crop of piped 2 strokes, W145/160 or OS140 or Mintor 170, is huge.
Bryan, BTW, the 22x10 wood/carbon hybrid was completed last week. Came in at 96 grams. Except if the 185 can turn it at 7K, Dean said that it would be noisy. Tip speed would be a bit higher than required and it would rip. We'll see..... first IF the 185 can turn the prop at 7K and second, at what noise level.
A 20x9 or 10 3 blader might be a better option.
Last edited by MTK; 05-27-2014 at 06:05 AM. Reason: post a couple photos
05-27-2014, 08:00 AM
#13
Yea, the good old days
Matt, That Hybrid prop sounds great ! right now we easily make noise with the 20.5 -10 apc turning at 72k -73 with the yS185
WIth the YS175 the 20.5-10 turns in the 70k range and is very quiet. It`s more about the noise of the airframe throught the mount and surfaces that kills you. we used to turn the 19.5-11.5 at 72k right on the limit with the early 175`s Even fuel type plays a part in getting the noise down more oil less engine noise.
. RPM is not the goal however ,as the 175 proves it easily can swing the same prop as the 185, Not at the same rpm ,But in the powerband, around 1/3- mid range where it counts. We barley ever go to full trottle now , Only in Muncie winds LOL.
This gives us way more flexibility with prop choice. A well done 3 blade is what we need now. But I cant get any one to do it for glow.
all the gas stuff available is way over done.
We need to get prop weights down though, and I like your Idea.
let me know how it works
Bryan
Matt, That Hybrid prop sounds great ! right now we easily make noise with the 20.5 -10 apc turning at 72k -73 with the yS185
WIth the YS175 the 20.5-10 turns in the 70k range and is very quiet. It`s more about the noise of the airframe throught the mount and surfaces that kills you. we used to turn the 19.5-11.5 at 72k right on the limit with the early 175`s Even fuel type plays a part in getting the noise down more oil less engine noise.
. RPM is not the goal however ,as the 175 proves it easily can swing the same prop as the 185, Not at the same rpm ,But in the powerband, around 1/3- mid range where it counts. We barley ever go to full trottle now , Only in Muncie winds LOL.
This gives us way more flexibility with prop choice. A well done 3 blade is what we need now. But I cant get any one to do it for glow.
all the gas stuff available is way over done.
We need to get prop weights down though, and I like your Idea.
let me know how it works
Bryan
05-27-2014, 08:31 AM
#14
Senior Member
Good point...we practically never operate at full throttle. But the test is done at full power. Oh well!
A three blader is hard to do in wood with common hand tools. A lathe would help in producing a very precise prop but I don't have a lathe in my shop. Nevertheless, 20x10 Electric wood props are available and should be easier to shape, narrowing and thinning the blades for IC power. Getting precision cuts at the hub will be key. The carbon cladding is straight forward and overall weight would be around 100 grams. Now If I can figure out how to post photos.....
Maybe I just figured it out
The other good thing is that I can use my Mag Balancer on the lighter prop. The plastic APC is just too heavy and just falls through
Last edited by MTK; 05-27-2014 at 08:34 AM.
