ENYA .50 ringed
02-05-2008, 08:01 AM
#1
Senior Member
Thread Starter
Join Date: Dec 2001
Location: Middletown,
MD
Posts: 697
Likes: 0
Received 0 Likes
on
0 Posts
ENYA .50 ringed
I have a SIG Bluehawk funfly bipe kit that is begging me to build it. I have an ENYA .45CX on a 4*40 that is a fantastic running gem. If you have run the ENYA .50 ringed then let me know what RPM it turned especially on props like the APC 12.25x3.75.
Thanks
Francis
Thanks
Francis
02-05-2008, 08:53 AM
#2
02-05-2008, 09:22 AM
#3
Senior Member
Thread Starter
Join Date: Dec 2001
Location: Middletown,
MD
Posts: 697
Likes: 0
Received 0 Likes
on
0 Posts
RE: ENYA .50 ringed
Dave,
That would be perfect. The ENYA website indicates that this engine weighs 15oz with the muffler, is that true?
Francis
remember March 8th is the Central Penn Areomodelers flea Market
That would be perfect. The ENYA website indicates that this engine weighs 15oz with the muffler, is that true?
Francis
remember March 8th is the Central Penn Areomodelers flea Market
02-05-2008, 06:05 PM
#5
My Feedback: (102)
Join Date: Dec 2001
Location: Colonial Beach, VA
Posts: 20,370
Likes: 0
Received 25 Likes
on
25 Posts
RE: ENYA .50 ringed
Thanks Harry, Francis, my engine is ABC and has no ring, sorry. It is a .50CXTN, on Fox 5% fuel/20% castor it turned the Graupner 12x5 at 12,195 rpm. Just when I fired it up my neighbor showed up with a load of firewood so it was nearly dark when I got to try it again. It weighs 1lb .5oz with muffler and prop nut and washer. I'd bet the ringed one weighs exactly what they claim.
02-05-2008, 06:45 PM
#6
My Feedback: (2)
RE: ENYA .50 ringed
I have a 50SS (ringed) with an 11.25 x 3.75 prop on a 40-sized Mojo profile. It has great throttle response and pulls out of a hover with authority. Unfortunately I don't have RPM numbers. I also have a 50CX non-ringed. They are very similar in power. The 50CX is supposed to be slightly more powerful, although I don't see much difference.
02-06-2008, 07:15 AM
#7
Senior Member
RE: ENYA .50 ringed
ORIGINAL: Harry Lagman
An APC 11 x 6 provides about the same load as a 12.25 x 3.75W.
An APC 11 x 6 provides about the same load as a 12.25 x 3.75W.
The 12.25x3.75W prop is much heavier.
To spin it at 13K, 1.54 HP are required to overcome its high prop constant of 1.5.
To do the same with the APC 11x6, only 1.22 HP are required.
A typical sport engine would spin the 11" prop about 1,100-1,300 RPM faster.
02-06-2008, 03:21 PM
#8
My Feedback: (102)
Join Date: Dec 2001
Location: Colonial Beach, VA
Posts: 20,370
Likes: 0
Received 25 Likes
on
25 Posts
RE: ENYA .50 ringed
I discovered this AM that the Enya .50 had soft compression, on turning the engine over I heard a leak. It turned out to be a leaking center post seal on a black generic plug whose origin I have no clue. It's the second one to which that has happened. On re-running the engine I could get 12,550 for about 30 seconds, the engine is almost new The pic. is one click rich from the peak. The engine pictured is an Enya .45 SS in which I installed a new ring. The original owner broke the ring being curious. A comment about the MDS muffler, it is from a .58, it is baffled and gives the Enya .50 and .45Ss a nice deep powerful sound as opposed to the high pitched snarl of the stockers.
The new reading on the .50CXTN was taken using a Fox standard non idlebar plug.
The new reading on the .50CXTN was taken using a Fox standard non idlebar plug.
02-07-2008, 04:36 AM
#11
Senior Member
Join Date: Nov 2003
Location: Auckland, NEW ZEALAND
Posts: 1,324
Likes: 0
Received 0 Likes
on
0 Posts
RE: ENYA .50 ringed
ORIGINAL: DarZeelon
Grant,
The 12.25x3.75W prop is much heavier.
To spin it at 13K, 1.54 HP are required to overcome its high prop constant of 1.5.
To do the same with the APC 11x6, only 1.22 HP are required.
A typical sport engine would spin the 11" prop about 1,100-1,300 RPM faster.
Grant,
The 12.25x3.75W prop is much heavier.
To spin it at 13K, 1.54 HP are required to overcome its high prop constant of 1.5.
To do the same with the APC 11x6, only 1.22 HP are required.
A typical sport engine would spin the 11" prop about 1,100-1,300 RPM faster.
For a nominal 11 x 6 rating, the APC is quite a heavy load - an engine that does 12K with the APC 11 x 6 will do 13.5K or thereabouts with an MA 11 x 6.
Edited: Grammar
02-07-2008, 05:16 AM
#12
Senior Member
RE: ENYA .50 ringed
ORIGINAL: Harry Lagman
Dar, that may be the case in theory but in many tests the guys at the field and I have run, these two props provide almost exactly the same load, typically within 100-150 rpm of each other at any given rpm point. They are to all intents and purposes the same static load and can be used pretty much interchangeably when determining performance.
Dar, that may be the case in theory but in many tests the guys at the field and I have run, these two props provide almost exactly the same load, typically within 100-150 rpm of each other at any given rpm point. They are to all intents and purposes the same static load and can be used pretty much interchangeably when determining performance.
My calculations are indeed from PĂ© Reivers PropPower calculator; not from actual observations.
It is just that I witnessed no one in my area (not even myself...) ever flying anything with an APC 11x6...
I have used the Bolly Clubman 11.5x6 (MVVS .49 - 13,600 RPM) and 11.5x5 sizes and have sold many to other fliers here.
But in 11x6, I have only used and seen others use (many with the warning label still stuck on...[:'(] ) the Master Airscrew G2 and G3 black props.
The Super Tigre .45 ABC spun this G2 prop at 14,100 RPM... A very respectable number for a sport engine of this displacement, with a standard exhaust.
