View Full Version : Discussion SV 17CC gas engine review
copperclad
Dec 15, 2008, 12:04 PM
hi
i just received one of the new 17cc engines that chaush is introducing
http://www.rcgroups.com/forums/showthread.php?t=961912
first thing i should say is i am a bit of a small gas engine nut and seeing that chaush was offering a 17cc gas engine was a bit too much for me and i jumped on the wagon for one , i am not affiliated with the company that builds these or the import of them , i am also not a professional engine reviewer , but i know a bunch of folks are interested in hearing about this engine and i am happy to jump in with my experience with it ...whew! :rolleyes:
first off , it comes in a nice cardboard box and is wrapped in 6mm closed cell foam sheeting to protect it during shipping and it arrived looking brand new , the box also contained a plug wrench , sparkplug , muffler , and the electronic ignition unit
it is small , roughly 5 inches tall and 6 inches side to side with muffler and carburetor , i have a few Zenoah engines so i dragged out the scale and weighed a Zenoah g-231 , a Zenoah G-20 , and the SV 17
you can see that it is about 3 oz heavier than the Zenoah G-20 and although you would think it should be lighter , three oz is pretty close , and i will guess that it has to do with the type of alloy used in the case , i only weighed the engines with exhaust and carburetion and left out the weight of the EI units and batteries
another thing worth pointing out is i weighed both stock EI units , the stock Zenoah EI unit is 7.0 oz and the SV unit is 4.3 oz this would bring the weight of the two engines to well within an ounce of each other ;)
.
copperclad
Dec 15, 2008, 12:08 PM
here are some photos of it on the test stand today , there were no surprises here , it all works about as you would expect , gas the tank , prime the engine , by putting your thumb over the carb intake and turn the engine over by hand a few times , till there is a bit of gas on your thumb , hook up a 4 cell ignition battery , and hit it with a starter motor , the engine fired right up into a nice idle of about 2700 RPM and i let it idle like this while i snapped a few photos
i do not have the engine run in yet , and i am not sure i have to , but i will bet as it breaks in over the first few tanks it will just keep getting smoother , but i played a bit with idle and revving it a bit , with a tach on it to see how it compared to the specs and can say , it idled well at around 2500 RPM out of the box and revving it i was seeing around 8100 RPM with a Graupner 12X5.5" prop , keep in mind i was only blipping the throttle open for very short periods of time as the engine was still on the first tank , and i am a bit of a chicken ;)
i want to burn off a tank or two and play with a bit of tuning to see how this engine behaves after it has had a chance to run in a bit , and i will post back here when i do , cheers , dana :)
chaush
Dec 15, 2008, 08:34 PM
Hi Dana,
Thanks very much for taking the time for a review and for your candid comments.
Just to confirm, the engine does require a 1-hour running-in period using petroleum-base (i.e., non-synthetic) lubricant in the ratio 1:30 with 90-Octane gasoline.
Wish you the best and let's see if you ultimately make the spec of 8500rpm with a 14x6 prop.
copperclad
Dec 16, 2008, 06:02 AM
the engine does require a 1-hour running-in period using petroleum-base (i.e., non-synthetic) lubricant in the ratio 1:30 with 90-Octane gasoline
Hi chaush
thanks , yes i am using Lawnboy ashless for breakin , and will switch to synthetic once it has had a chance to run in
i think it is really great to see another small gas engine for our hobby , i have been running Zenoah engines for many years , in both planes and helis and i am really glad that you have been able to make this new engine available , thanks and cheers , dana :)
chaush
Dec 17, 2008, 08:11 AM
It has been a pleasure, Dana.
I am also looking forward to introducing more unusual products for our fascinating hobby in the near future.
Thanks for the initiative you took in starting out with the review so rapidly!
fanfoldfan
Dec 18, 2008, 10:37 AM
would this engine be suitable for the hanger 9 ultra stick
http://www.hangar-9.com/Products/Default.aspx?ProdID=HAN2350
chaush
Dec 18, 2008, 06:37 PM
Hi fanfoldfan,
The answer is "it depends"...
If you are looking for a drop-in replacement, this engine would be unsuitable due to its higher weight versus a glow, because the H9US is a very light aircraft with a short tail moment arm.
But if you are intent on flying this airplane with gas, then I do not know of any engine other than this one that will provide the right amount of power for this airplane (i.e., this engine will deliver the flight performance of a .60-glow with the fuel economy & other advantages of a gas engine).
The downside is that it would require considerable reorganization and/or modification on this particular airplane:
- the fuel tank could be moved back to the CG area (the pump on the Walbro carb will have no problem pulling fuel through a long line)
- the batteries (receiver & ignition) could be mounted behind the CG to offset the engine weight
- worst case scenario, you would have to trim the nose length back and reconstruct that area so that although the engine weight is higher, the shorter moment arm will move your CG back to the recommended range.
I hope this helped answer your question.
fanfoldfan
Dec 18, 2008, 07:14 PM
thanks for the detailed reply. sounds like not the ideal plane for the project. one of the fields I fly at is kind of rough, not suited for a nice gasser. I need a stick type plane with tall gear and big tires. Perhaps time to build an airplane for the engine .... now to find some old Kraft/Jensen Ugly Stick plans.
chaush
Dec 19, 2008, 08:13 AM
Oh... are you searching for a suitable airplane to put this engine into...? (I thought you already had the H9US and were simply looking for a suitable engine.)
In that case, I'll also look around and suggest any suitable airframes for this engine, preferably stick type, etc...
copperclad
Dec 19, 2008, 10:26 AM
Hi Fanfoldfan
i have not gotten to put my engine in a plane yet , and am in the same boat as i still need to pick out a plane for it also ;)
i have been into gas engines for a number of years and it has been true that kits were not usually made for gas engines , but brought over from the glow side of the hobby to do gas duty :D
and of coase this involved a certain amount of hacking , i would be happy to share some of my secret methods that have worked well in past projects , but of coarse you will have to promise not to tell anyone , and this goes for everyone else reading this thread too ;) :D
a good starting place is to look at kits that work for the Zenoah G-20ei , Horizon hobby lists lots of planes that the G-20 will work with , and i would write down wing area and weight of these planes as you come across them , to compare to kits you are interested in
the Horizon site says that the G-20 will work for sport kits designed for .90 through 1.20 sized nitro engines
http://www.horizonhobby.com/Products/Default.aspx?ProdID=ZENE20EI
the other thing i do , i started this back when you had to build the plane from a kit , and it still holds true with ARF's and what not , is to build a balance from a piece of wood , let me explain
this is all very easy , but i am sure by explaining it i can make it seem quite complicated ;)
i will take a piece of wood , roughly a 1" X 8" X 6' and set it across something like a pencil layed on your workbench , the idea is to get the board to balance and then mark this balance point on the board ( think teeter totter ) , now you can lay out the pieces of the kit or airframe on the top of the board , so that the C/G of the model is directly over the balance point you marked out on the board , you want to have all the parts , including the servos and flight battery for this as it lets you see how the kit will balance out when it is finished , if you are carefull with this method you can get it very close
i started using this method to find out how much , if any , i would need to shorten the nose of a plane to get an oversized engine to balance , with the entire kit on the balance , you would position the engine on , as though it were mounted to the firewall , this lets you see how nose heavy , if any , the finished plane would be , with a board that is say 8" wide , you can set the engine next to the fuse , and this lets you see the balance if the nose were shortened , by playing around like this , you can see just how much if any the front will have to be shortened to accommodate an over sized engine
HTH , dana :)
fanfoldfan
Dec 19, 2008, 01:57 PM
great Dana, thanks for the tips .... you've given me some good ideas. The stick design for rough field flying is exactly what I want. I'll try to find something suitable to modify, but it looks more likely to be a build project ... been a while, but I bet I can still glue sticks together.
Please let me know what you come up with ... love the motor, need a plane. ready to order when it's sorted out.
http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXBMM8&P=0
Maybe? just looking around found this...looks like built for glow engine ... set up as tail dragger
copperclad
Dec 19, 2008, 02:38 PM
Hi Fanfoldfan
Yes , i think it is just about perfect , i cut my teeth on a Big Stick 60 kit back in the 80's and i am guessing the SV-17 would haul it around fine , cheers , dana :)
here's a search i just did on google for " big stick 60 Zenoah G20ei "
http://www.google.com/search?hl=en&sa=X&oi=spell&resnum=0&ct=result&cd=1&q=big+stick+60+Zenoah+G20ei&spell=1
.
jg4660
Dec 19, 2008, 04:21 PM
Heres an Ultra Stick 60 with a Zenoah G20, flies great.
http://www.youtube.com/watch?v=C6bqM6IpYnU&feature=related
JG
fanfoldfan
Dec 19, 2008, 05:32 PM
lots to compair here ....the Ultrastick $229 ... 66" ... 6-7lbs
60 Uglystick $179 ... 66.5" ... 6.5lbs
I know the Ultrastick is capable of 3-D aerobatics ... the Uglystick, not so much. I think the control surfaces would have to be increased in size.
The question of durability ... I think the Uglystick with its roots from glow engines would be the better choice here.
Who exactly is the distributer ( in the states with support and parts ? )of this 17cc gas engine ... does the manufactore ( I imagine china ) have any other products on the market that we can compair reputations.
I love the idea of the size and looks of the engine ... the price (introductory) is outstanding, and the biggest selling point compaired to other known 20cc engines available.
chaush
Dec 19, 2008, 07:38 PM
Hi Dana & JG,
Thanks for the very valuable help you're providing folks interested in the SV-17 engine.
Hello fanfoldfan,
I am (at least one of the) distributor(s) in the USA for this engine, and will be standing by to support customers with parts and service. I honestly do not know who else is offering this engine currently in the US.
You are welcome to visit my website http://avianautica.com for more info, or of course, please ask away and I'll answer questions here.
Thanks for the compliments... besides the price, this engine allows you to go down one size further in airframe size without having an overpowered rocket on your hands.
Over time, I will work with the manufacturer to trim some weight off of this engine. With due modesty, I am a mechanical/aero engineer with 19 years of design/development experience and will hopefully be able to add value to this and other products over time, besides offering some of my own in due course.
chaush
Dec 19, 2008, 07:40 PM
Hi Fanfoldfan
Yes , i think it is just about perfect , i cut my teeth on a Big Stick 60 kit back in the 80's and i am guessing the SV-17 would haul it around fine , cheers , dana :)
here's a search i just did on google for " big stick 60 Zenoah G20ei "
http://www.google.com/search?hl=en&sa=X&oi=spell&resnum=0&ct=result&cd=1&q=big+stick+60+Zenoah+G20ei&spell=1
.
Dana, the link you have provided here is a lesson in marketing for me! :)
...because it led me to this link:
http://h1070257.hobbyshopnow.com/products/Article.asp?file=1615-ART.xml
Thanks again!
Basically, whatever airframes the G20ei can fly and smaller, the SV-17 can fly...
chaush
Dec 20, 2008, 10:38 AM
Hi fanfoldfan,
This deviates from your Stick spec, but how would you like this airframe for the 17cc gas engine?
http://www.rcuniverse.com/magazine/article_display.cfm?article_id=1061
Long tail moment arm coupled with a short nose, nice roomy fuselage, killer looks, no harder to fly than a Stick...
The reviewer actually had to add lead in the nose to balance it with the glow engine.
fanfoldfan
Dec 20, 2008, 10:55 AM
good suggestion ... but I'm sticking with the stick :) I have a 72" Yak 28cc gas that fills the "conventional" airplane role very nicely. I'm looking for something that will take a little abuse, short field, and rougher runways and still be capable of being throwen around in the air. The Uglystick 60 seems to be the one to fill the bill. Some modifications maybe. Need to check your site but I assume your motors are on the market now ... how long will the introductory price last?
chaush
Dec 20, 2008, 12:23 PM
Good... given that even the H9US has been flown with a gas engine, the UglyStick-60 should be quite feasible too.... :cool:
These engines are in stock & available on the Online Store page of my website.
http://avianautica.com/shop.aspx
I have just a few engines in stock right now and may have to review the price on the next shipment from the manufacturer depending on customs duties, etc.
fanfoldfan
Dec 20, 2008, 12:36 PM
thanks for the quick reply. How long do you think it will take working with your manufacture to get the weight down. The $$ increase by waiting could well be worth it.
chaush
Dec 20, 2008, 12:41 PM
Oh... don't hold your breath on that, I was talking about a longer term plan.
The current response from them is that "it can't be done", so it is going to take some time & effort to see this in effect.
chaush
Dec 21, 2008, 11:12 AM
...as of last count, I have 7 of these engines available.
FrankW
Dec 21, 2008, 01:12 PM
How's the break in going? I'm thinking about setting up a gasser for a 60-90 sized plane as the cost of glow fuel has risen substansially recently and gas is below $1.60/gal
-Frank
copperclad
Dec 21, 2008, 01:33 PM
Hi Frank
sorry i didn't post sooner , i am in the north east , and we have been having some weather , i will post when i get a chance to get back to the 17cc though , cheers :)
FrankW
Dec 21, 2008, 01:38 PM
lol, no problem. We're snowed in here in the NW. I am getting flying withdrawls... I should get some skis for my SpaceWalker II. No rush, just looking forward to more.
-Frank
lrglnman
Dec 23, 2008, 06:46 PM
Fanfold, I have the h9 ultrastick with the g20 setup . JG4660 along with Karollh from Jamacia was a big insperation with me to go this route. However I done mine a bit different as I removed 2 1/2 inches from nose and remounted the firewall. moved the servos to the rear and everything else right on the cg the ignition sets in front of the 8oz tank with the servo battery behind the tank and the 2700mah nm ignition battery beside the tank ballance is on the spot according to the manual. It is swinging a 15-8 APC prop and just like JG4660's video shows the extra weight of a gas engine has no effect whatsoever . Let me tell you this, this plane flies so well i could land it blindfolded ; - ) .plane will go unlimited vertical so fast it makes my head swim. and slow to a lazy crawl to land. I also removed to mounting plate and opted to mount directly to the firewall. overall weight came to around 7.5 lbs on bathroom scales . this was done with my son ,holding the plane, getting on the scales ,weighing, and getting off , then weighing him by hisself. total 7.5 lbs. also you need 2.4 or a PCM receiver. dont fly this with a regular ppm receiver. Radio noise. I used Dubro tub rods for the throttle. I think this 17cc motor will be a gem of a motor for this plane. just take 2.5 inches off the nose .
James
infinitemass
Dec 25, 2008, 09:56 AM
So you guys think this would be a good candidate for a Top Flite 60 size P-47?
I`m building one now and from what I gather, it will need the extra weight up front anyway.
I have a 26cc I was going to use but would really have to butcher up the cowl.
chaush
Dec 25, 2008, 11:47 AM
Hi infinitemass,
Even if I have to say it myself, I don't believe you'll find an engine better matched for that airframe than this 17cc engine (if you're looking for a gas engine).
Best wishes,
chaush
infinitemass
Dec 25, 2008, 12:02 PM
Hi infinitemass,
Even if I have to say it myself, I don't believe you'll find an engine better matched for that airframe than this 17cc engine (if you're looking for a gas engine).
Best wishes,
chaush
Good to hear!
Positively looking for a gas engine and this one`s small head looks like just the ticket.
Any idea if a Pitts style muffler is in the works? The less the cowl needs to be cut, the better.
chaush
Dec 25, 2008, 02:04 PM
Presently you may have to make do with the standard included muffler or get a custom Pitts-style muffler.
If this engine is popular enough and my relationship with the manufacturer matures, I am looking forward to working with them on further enhancements to the design, including in the layout & configuration of the muffler.
I would expect the time-frame to be a few months though.
fanfoldfan
Dec 25, 2008, 09:32 PM
Fanfold, I have the h9 ultrastick with the g20 setup . JG4660 along with Karollh from Jamacia was a big insperation with me to go this route. However I done mine a bit different as I removed 2 1/2 inches from nose and remounted the firewall. moved the servos to the rear and everything else right on the cg the ignition sets in front of the 8oz tank with the servo battery behind the tank and the 2700mah nm ignition battery beside the tank ballance is on the spot according to the manual. It is swinging a 15-8 APC prop and just like JG4660's video shows the extra weight of a gas engine has no effect whatsoever . Let me tell you this, this plane flies so well i could land it blindfolded ; - ) .plane will go unlimited vertical so fast it makes my head swim. and slow to a lazy crawl to land. I also removed to mounting plate and opted to mount directly to the firewall. overall weight came to around 7.5 lbs on bathroom scales . this was done with my son ,holding the plane, getting on the scales ,weighing, and getting off , then weighing him by hisself. total 7.5 lbs. also you need 2.4 or a PCM receiver. dont fly this with a regular ppm receiver. Radio noise. I used Dubro tub rods for the throttle. I think this 17cc motor will be a gem of a motor for this plane. just take 2.5 inches off the nose .
James
thanks, that's just the information I needed. I worried about the duribility of the H9 ultra stick with gas, but it sounds like you have it under control. I just wish we could get some weight off the 17cc. Think I'm going to keep my eye on this for awhile.
sarg96
Dec 27, 2008, 12:20 PM
Presently you may have to make do with the standard included muffler or get a custom Pitts-style muffler.
If this engine is popular enough and my relationship with the manufacturer matures, I am looking forward to working with them on further enhancements to the design, including in the layout & configuration of the muffler.
I would expect the time-frame to be a few months though.
I just talked to Dick Bennett, owner of B&B Specialties and he is going to
modify the header he makes for the G-20-23 so it will fit the SV-17 which
will allow in-cowl mounting. After I have this header in hand, I will report
back and let everyone know if I am satisfied with it.
sarg96
chaush
Dec 28, 2008, 11:26 AM
Hi sarg96,
Great news! Thanks very much for sharing this.
Best wishes,
chaush
chaush
Dec 30, 2008, 11:37 PM
So you guys think this would be a good candidate for a Top Flite 60 size P-47?
I`m building one now and from what I gather, it will need the extra weight up front anyway.
I have a 26cc I was going to use but would really have to butcher up the cowl.
Hi infinitemass,
Could you please let me know the internal dimensions of your cowl (height & width)? Thanks.
infinitemass
Dec 31, 2008, 07:55 PM
Just took some measurements.
At the front of the cowl, the the inside height is 7 3/4".
The width is just under 8"
From the firewall to the front is 4 1/4".
Hope this helps.
chaush
Jan 01, 2009, 09:24 AM
That sounds very good... that cowl should easily swallow up the whole engine (incl. carb & muffler) without any problem.
The drive washer surface will stick out 0.9" in front of the cowl lip, and if you wanted it closer, you could trim the motor mount a little short.
Here are the major dimensions on the SV 17cc Engine:
Length is measured along crankshaft axis.
Height is measured along direction of piston stroke.
Width is measured along the third normal direction (direction of exhaust port).
Length of cylinder head = 2.13"
Width of cylinder head = 2.15"
Height of cylinder head = 2.70"
Width of engine without carburetor or muffler = 2.65"
Width of engine with carburetor & muffler (except for short outlet) = 5.90"
Height of engine (bottom of crankcase to top of head) = 4.85"
Length of engine from prop drive surface (backplate) to firewall = 5.15"
Length of prop drive hub = 1.05"
Length of crankcase = 1.40"
Length of stand-off engine mount = 2.70"
Width of stand-off engine mount = 2.65"
Width of carburetor (far surface) from crankshaft axis = 2.90"
Width of muffler (far surface) from crankshaft axis = 3.00"
Width of muffler outlet piece (small tube jutting out) = 1.30"
infinitemass
Jan 02, 2009, 08:31 AM
Thanks for the measurements! Looks like it`ll fit even with the stock muffler. Would`nt shorten the mount. After quite a bit of testing, having the prop too close to the cowl, while nice to look at, really effects performance.
Both of my present gassers are round cowl (Yak54 and SU31). I`ve played around with the distance between the prop and cowl and with every combination I`ve tried, being too close to the cowl dramatically effected performance.
1.It`ll fit.
2. Lower operating cost compared to glow.
3. Short nosed warbird will need the extra weight up front anyway.
4.Will swing a tall prop to get around the round cowl.
Now I have all the info I need to go to my accountant (I.E. my Wife.)
sarg96
Jan 05, 2009, 01:02 PM
As promised here are pictures of the SV-17 with the header Mr. Dick Bennet modified to fit it. As you can see with the engine mounted straight up
the header has a 14deg slant towards the plane which is good, however if you mount inverted the slant is foward. In most applications this is not a
problem, just calling your attention to it.
THIS ENGINE IS FOR SALE WITH THE NEW HEADER AND ORIGINAL MUFFLER.
i HAVE DECIDED NOT TO SWITCH TO GAS.
sarg96
chaush
Jan 06, 2009, 08:51 AM
Hi sarg96,
The custom header looks very nice... what did Mr. Bennet charge you for this (if you don't mind)?
Also, could you please check the width of the header (2nd picture, max. horizontal dimension of header) & the weight?
Best wishes.
sarg96
Jan 06, 2009, 11:58 AM
Hi sarg96,
The custom header looks very nice... what did Mr. Bennet charge you for this (if you don't mind)?
Also, could you please check the width of the header (2nd picture, max. horizontal dimension of header) & the weight?
Best wishes.
Hi chaush, total width of the header is 3/4 inch, Dick Bennett has these on his website for $37.95, he charged me $5.00 to modify it which was a matter of elongating the mounting holes 2mm and $8.00 for shipping to S.C. from Indiana. I have no way of weighing it, but it feels a bit lighter than the original muffler. It is made of extruded aluminum. I think it is a great addition to your engine. I would have prefered the pipe to be straight vertical, but it can be mounted vertically as is with no problem.
sarg96
chaush
Jan 07, 2009, 08:37 AM
Thanks, sarg96. :)
mchandrayan
Apr 19, 2009, 02:01 PM
Chaush,
I am thinking of getting this engine (from a guy locally here in India) and was planning to put it into a Carl Goldberg Super Chippy kit.
What are your views would the engine with standard muffler fit in the cowl and have sufficient scale like power?
Thanks
chaush
Apr 19, 2009, 05:37 PM
Hello mchandrayan,
Power-wise, I think this engine would be ideal for the 64" wingspan Chipmunk.
With the standard muffler, there should be minimum cutting of the cowl required, if at all. You may go to my website for dims on this engine: avianautica.com
I recommend that you go ahead with your local purchase.
bryadelm
Jun 01, 2009, 08:51 AM
I considered the SV-17 as replacement for my O.S. 70 FS II that weighs 23 oz in a Carl Goldberg Piper Cub. There is approximately 1.0 HP power provided by both of these engines.
However, I cannot image how I would compensate for the extra weight of approximately 19 oz when installing a 42 oz for the SV-17.
Has anyone found a suitable plane that needed the extra weight in the nose for installing a SV-17?
NJAIRSTRIKE
Jun 01, 2009, 07:25 PM
I have a os 91 2 stroke engine on my TP P-51 and I have a GREAT PLANES Gee Bee, Both planes have the 2 stroke 90, do you think the SV-17 is a great replacement for these 2 engines on these 2 planes???? $2 a gallon compared to $18 a gallon for 15% wildcat, I would replace them both in a heart beat if they are a good idea?
chaush
Jun 01, 2009, 10:51 PM
Hi bryadelm,
The point you made is very valid... if you need a light engine in the nose, then this 17cc engine (or any gas engine for that matter) is not a good choice in general.
If you had a preference for going gas anyway, there are ways you could accomplish this... move the tank to under the CG (since the gasser has a pump on it), move other equipment towards the tail, etc.
chaush
Jun 01, 2009, 10:59 PM
I have a os 91 2 stroke engine on my TP P-51 and I have a GREAT PLANES Gee Bee, Both planes have the 2 stroke 90, do you think the SV-17 is a great replacement for these 2 engines on these 2 planes???? $2 a gallon compared to $18 a gallon for 15% wildcat, I would replace them both in a heart beat if they are a good idea?
Hi NJAIRSTRIKE,
Power-wise, the 17cc gas engine would be a good replacement, and the fact that you can easily use a 14-15" dia. prop should help matters too.
Do you have to use nose weight to balance these two airframes? If so, this gas engine replacement would be a further helpful. Otherwise, you can re-arrange your gear to achieve balance in the model.
Another point of relevance is that your gas tank would last much longer in flight duration with using this small 17cc engine versus a larger gas engine.
NJAIRSTRIKE
Jun 02, 2009, 08:30 AM
Hey Chaush,
So your saying that the 17CC gas engine is just about the same power as the O.S 91 2 stroke? What is the Weight with muffler and ignition minus the battery on this engine? What is the weight difference compared to the O.S 91 2 stroke? how much RPM are you getting with a 15 x 6 prop? I really need to make sure this is the right thing to do before doing it. I know you need an extra battery for the iginition but thast not a problem with lipo battery and a step down regulator.
chaush
Jun 04, 2009, 09:24 PM
Hi NJAIRSTRIKE,
Sorry I made one slip, this engine is meant to be an ideal replacement for a glow 2-stroke .60-engine.
You may compare the specs for the 17cc engine from http://avianautica.com/engines.aspx to your own engine and see if it makes sense to swap.
This engine can do 8500rpm with a 14x6 prop, per the manufacturer, and you can use a 15x6 but I expect the rpm will drop to the 7500-8000 range.
Even though the HP may be lower on the gas engine, if you are able to run a larger prop, both the propeller efficiency (function of Re effects) as well as the propulsive efficiency (function of airplane speed/prop-wash speed) will be higher.
Based on the factors above, it may still make sense to swap out, but I would urge you to do a careful analysis starting with prop rpms.
chaush
Jun 04, 2009, 09:25 PM
For the two planes in question, what is the recommended engine (.60 or .90)?
R.Sonnel
Aug 16, 2009, 10:45 PM
I mounted a 26cc gas engine on a H9 150 Twist. I cut the cheeks off and mounted it like the one on the stick. It works great. The plane ended up being tail heavy,I had to mount the engine forward by 1/4",(I used washers on the standoffs as spacers) go figure. I wonder how this 17cc SV engine would work on a 60 Twist. It has very low wing loading.Some guy's thought my Twist 150 would be a dog. It is far from a dog. In Canada a US gallon of 15% Cool Power is $31.00 Canadian Funds VS $6.00 for a US gallon of gasoline(oil included in gas). My 26cc burns the same volume of gasoline per hour as my 55AX burns glow fuel. In my experience the weight factor of the gasoline engine vs glow was very easy to overcome. Correct me if I am wrong but, 4 oz of lead on the tail is equal to 1lb on the nose. So after this long winded story, I convinced myself the 60 Twist would work with this engine. Any and all opinions are welcome. :)
chaush
Aug 26, 2009, 08:41 AM
Hi R.Sonnel,
For some reason, I did not get an update when you posted your message, so sorry for the late response.
If you can manage the extra weight, this engine should be very good for the 60-Twist.
I have exactly 2 engines left and I may not order any more after this, as I am concentrating on my own product line (whch was the primary intent for my website any way: avianautica.com )
Thanks for your interest!
chaush
Sep 15, 2009, 10:56 PM
http://avianautica.com/engines.aspx
I have the last 2 engines remaining that I would like to dispose of and focus on my own specialized products...
$170 each + $11 shipping within the Continental US.
Thanks in advance for your interest.
Patxipt
Sep 16, 2009, 03:15 AM
Chaush,
Can you inform me of the shipping prices for one engine to Portugal?
Thanks!
chaush
Sep 17, 2009, 12:11 AM
Hi Patxipt,
Cheapest shipping seems to be US Postal Service priority mail, but even that is $39.50!
You may check it out at www.usps.com . Go to Calculate Postage, International, Portugal, package weight 5 lbs. and you'll see the list of options.
Thanks.
Patxipt
Sep 17, 2009, 08:53 AM
Chaush, I've sent you an e-mail ;)
chaush
Sep 18, 2009, 07:18 AM
Hi Patxipt,
Thanks very much. You should have a reply email. :)
Best regards,
chaush
Ich Bin
Sep 20, 2009, 09:32 AM
http://avianautica.com/engines.aspx
I have the last 2 engines remaining that I would like to dispose of and focus on my own specialized products...
$170 each + $11 shipping within the Continental US.
Thanks in advance for your interest.
FYI:
My Dad sent you an e-mail regarding one of the final two remaining. Let us know.
Eric Heinz
chaush
Sep 21, 2009, 11:59 AM
Hello Eric,
I sent an email reply to your dad. :)
Thanks & best wishes,
chaush
chaush
Sep 27, 2009, 10:35 PM
Last 2 engines sold, thanks Patxipt & Eric!
Ich Bin
Sep 27, 2009, 10:59 PM
Last 2 engines sold, thanks Patxipt & Eric!
Yeah my Dad already has it. Showed it some guys at the flying field and it drew some interest. It is going in a Senior Telemaster, so it should work great.
E
Doctor Who
Oct 13, 2009, 02:15 PM
Anyone have any recomendations for either a WWI or WWII aircraft for the SV17?
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