I'm betting the .61 and the .91fs will fly the plane about the same. The plane does fly better with more power but it was designed for a .61 two stroke back in the day. I went from a YS 1.20 to an OS 1.20 and the OS didn't pull near as well as the YS so I went right back to the YS engine. If you liked the plane before with a .61 then it's the right engine for you. Not everyone requires straight up vertical, it's another choice thing. I just happen to like the performance I get with the YS 1.20. It's a perfect choice for me. Next one will use a 1.40 gasser but I'm thinking it may be over kill. If so I have a couple more of the YS 1.20s on hand.

Hey guys! Haven't been on here in a while. I am happy to see the Extra 300 thread seeing plenty of traffic.

Here is my pathetically slow progress! I will trim with Insignia Blue, and black. It's been a fun build, but I'm ready to be done with it.......and start something new!

I thought you were all done with that model long ago. I like the servos in the tail mod, and thought about doing that to mine, but just too lazy I guess to interfere with something that's been working so well.

Karol

It should have been done a long time ago. I'm just a slug.

The servos in the tail should work out well. I did that on my Ultimate 10-300 and ended up not having to put a bunch of lead in the tail. Also, I will hook the servos into their own channel for redundancy purposes.

Another way to use a mosquito pump spray.!!

Never in a million years would I have thought of that. I just painted a plane with latex house paint and I'm thinking that would have put it down just as well as a spray gun. Very easy paint to work with. Not fuel proof but gas doesn't bother it at all. Good trick!!

Glad you like it.

50/50 thinner and automotive paint will do the trick.

Total Cost:less than 5 Dollars.

I broke in the new ASP .61 2-stroke yesterday at the field and did a few test flights with it and I'm quite happy. It provides a lot more thrust with the same APC 13 x 6 propeller than the Magnum .91 four stroke did and it flies like it did with the OS .61. It isn't a rocket of course, but it does lift off quickly and climbs out with authority and is quite fast in level flight.

The pictures show the mounting with no changes to the bolt pattern required. I did have to open up a hole at the front of the cowl for the needle valve though. The spinner scrape marks are from the Magnum .91 as it was shorter from the mounting holes to the thrust plate than the ASP is. There is pleanty of gap with the ASP.

Now I'll pick up a good 3" dia aluminum spinner to replace the plastic one and I should be good through the rest of the fall and the skis are ready for winter!

Jaybird

Very clean set up. My cowl looks like that with grind marks on the nose. It happens!! Back in the day this was a plane designed for a .60. Back then it was a pretty big glow engine. The plane was flown on the wing and there were somt tricks you did to make the plane do what you wanted like a bit of a dive before you did a big loop. Today we are spoiled with all the choices of engines we can use in this plane.No one really gave a lot of thought about installing a G-23 in this little plane. You could lighten up the Zenoah and use it but why bother?? I use the YS 1.20 and I can use up all the sky doing a big loop from level flight. I like it!! Do I need the added power?? NO, but I like it. Glad to see you fought the feeling and used the correct engine for the plane. Looks good.

I found it would do a pretty large loop with a good build up of speed going into it. I'm still running it a little rich and on 10% nitro fuel. I'm sure it will continue to perform better as I fine tune it and switch over to the 15% that I use regularly. I've also increased the aileron deflection to see if I can speed up the roll rate. It was okay, but in certain situations it could be slow to recover.

Jaybird

Hopefully you are using one servo per aileron.

Karol

Yes, one mounted in each wing panel with a short pushrod. Not looking for 3D, just a little better response. They had been mounted at the furthest hole out on the nylon aileron control horn and I had full travel on the servo. I simply moved the linkages up two holes to change the geometry.

Jaybird

Aileron Diff. for a better roll rate. Not a hugh difference but it does help. The difference between me running 15% against 30% is about 400 rpm. What will I ever do with all that added horse power!!! Not all engines run well on higher nitro. I do run nothing but 15% myself but it isn't for that massive power boost. It's because I get the 15% on sale.

My earlier version ASP .61 and .75 engines ran quite crappy and would overheat on anything above 10%, and ran smoothest on FIA or 5% fuel.

Karol

I'm not a big fan of ASP or Magnum and don't have a lot of run time on them but I have tried to run 15% in Moki and MDS and both of those are high compression engines designed for FAI or 5%. The MDS engines I sent to Gary sounds like they are running a lot better on 5%. I had it running on 15% but I found out years later they were a lot better on lower nitro. Moki doesn't like nitro at all but do run pretty well on the 5%. They are also big fans of Castor Oil. Other then the ASP four strokes I don't have mush info on them. It's another one of the engines I don't see a lot of in my area.

Thanks for the heads up. I have no experience with ASp engines so I'll be sure to monitor it as I continue to break it in. It runs really well on 10% and it's less expensive, but I'd rather take just one jug of fuel to field.

Jaybird

We had 12" of snow in aour area the day before Thanksgiving so I put the skis on today and headed up to the KVMA field. The snow had settled quite a bit with warmer temperatures the last fews days. There was evidence of some flying ealier in the day with some float or ski tracks in the snow. The ASP started right up and ran well in the 46 F degree temps and the snow was just firm enough for the skis to work even though it was pretty sticky. A trick I learned last winter was to use spray PAM on the bottom of the aluminum skis and plastic floats on my electric planes to keep it from getting stuck to the wet snow. I got in several flights with all three planes before it started to cool off and the sun was setting.

Good fun!

Jaybird

How fun!! I still have never flown off of snow or water. Seems to me a ski on the tail wheel would work better?? That's really more of a question, I wouldn't know. I have flown while it was snowing, not sticking but snowing. Not to mention super high winds. Anyway, that looks like fun to me.

If the snow is deep, fresh powder I find floats to be the way to go. Skis just can't support the weight and the model sinks before it can get enough airspeed to take off. If you do manage to take off the landing is usually a big spray of snow and a long trudge through the powder to retrieve it. Todays snow was compacted and pretty firm so the skis worked well. The tailwheel drags a little but once it lifts it's no problem. The plane would take off quite easily today and with a good flair to keep the ski tips up would land nicely. The floats worked well today too. If the snow has crusted over then skis really are prefered as the hard, icy surface can damage some floats. The big thing is to avoid deep foot print holes as they can swallow a plane pretty quick! Nothing like a take charge turned cartwheel because of a ski or float falling into a boot hole!

I've got snow flying videos on YouTube. http://www.youtube.com/watch?v=J4OJUm2h4vE

Jaybird.

Yep Pam or wax makes all the difference in the world when it comes to skis sticking. That video brings back alot of memorys, some folks don't take to kindly to the winter months and miss out on alot of very fun activitys, I still try to make it out at least once or twice during the winter but with several operations to the old back limits my attendence. We have a Jan 1st funfly for the members here every year that sometimes is not to warm*L* last year it was 3 below zero but I went ahead and flew anyway. The guys at the meet gave me some very odd looks when I pulled out a small propane torch to warm up the glow engine on one of my profile planes. Worked like a charm and was not the first time I have used that method.
However there is one thing a person needs to keep a close eye on and that is your batteries, both the plane and transmitter the cold will zap the juice alot faster than a nice warm day. Other than that, dress for the conditions and have a ball.

No thanks. Once it gets down into the 30s my fun factor starts to go way down. As many back operations I have had the cold doesn't effect my back. It's my hands that suffer. I like the heat!!

It was in the high 40's low 50's today and the snow was melting fast. There were a few guys flying gliders with a gas powered tug plane and couple of electric powered planes. The snow was very sticky and the spray PAM came in handy. There were no thermals for the glider guys to ride in and there was just a slight breeze once in a while. The sun kept trying to come out but the gray overcast persisted and made the planes hard to see.

I did get a video and it's uploading to YouTube now. I'll post a link later.

Jaybird

That just looks so cool with it's feet dangling down ready to land. I have given floats a thought or two but never had the nerve to fly one of my favorite planes off of the water. I have given thoughts to floating my Hots though. The plane is OK for water use but it has one of my favorite engines in it. Hate to see it go under water.

Here is a short video from today.

http://youtu.be/pH8pnEc-1fI

I would strongly suggest you give float flying a try if you can. My older brother has been float flying for many years and always told me to try it but I had the concerns as you. Well, I started a few years back with some small electric planes on floats and then my 80" Cub and now a 1/4 scale CUB and I love it. It's great to take one to a camp and show friends that don't fly as well as going to club sponsored float flys.

Jaybird

Great video and thanks for sharing, plus your Extra seems to fly quite well on that .61 power. Here in Jamaica that white powdery stuff is foreign to us so we can only attempt float flying off water, but I have never tried it having serious concerns of damaging or losing all in an unscheduled dunking.

Karol