My 670 on my Avid Mk IV is nearly a drop in from the 582, same mount. The weight difference is very small. Typically about 15 lbs total for the engine, exhaust, extra prop blade and electric fuel pump
@@dcavidflyer3073 Doing WT and BAl this week. Looks like the plane is very heavy. Still need to get flight instruction. It may be some time before I can fly my plane.
I actually found my CG to be spot on with everting added in. But if it was off I was thinking the same, move the batt. Move weight I already have instead of adding. Good Call.
I also have an Avid Flyer mark IV tail dragger with a 670 Rotax which I acquired used several years ago. After working out all the problems in the airframe, engine and fuel system it is ready to fly, but I cannot get it to make a straight takeoff run down the runway centerline. It most always wants to make a sudden radical left turn when full power is applied causing my take off to be aborted. What sequence of events do you use when you are taking off? You never seem to wander from the center of the runway. Please advise with your technique.
You may want to check the alinement of the gear. A darting to the left might be due to that or even a sticking brake pad. If I recall the rotax blade spins in the opposite direction from a Lycoming or continental. These engines will cause the plane to pull left due to the torque, also coming up on the mains will make you go left due to gyro effect. I do not think this applies to the Rotax. If its just engine force pulling you left and not misaligned gear or sticking brake. Try applying right rudder and pushing power in slow. Also recommend getting a CFI who know tailwheel and Rotax to fly it.
They are a blast man. Stall speed is around 35-42mph. Plans might be hard to come by you can look on Barnstormers for kits not finished, avidfoxflyers.com/. These would be your best bets. good luck.
@dcavidflyer3073 thanks I'm going to look there to. I looked at the files on the world wide avid flyers on Facebook. And they had some plans for Avids and the knock off the Raven. Buying one would be probably be my best bet but building one would be fun.
Tony, I did not actually take it up and fly without the cowling. With cowling I was seeing about 85mph. This is with climb pitch, stol wing and draggy tires.
No videos lately, are you still working on it? I talked to Rotax Rick today about my 618. I’m sending it to him and was looking forward to see how your 670 is doing. Are you happy with the build?
hey I built the plane up flew it and sold it. I really did like the 670 performance. You will see a big jump in STOL activities. I did not set my prop up for cruse but to get off the ground quick, so I can not contest to the cruse. From what I know you would see some gain in cruse speed, but this plane and wing/gear/tires had so much drag. I sold it because I wanted a plane with more room, so I purchased a 170B. I really do love the plane and 670 for fun get out and spend a few hours flying.
@@dcavidflyer3073 Damn! I’d love to have a 170B that’s a nice 4 place tail dragger! My buddy’s dad has one sitting in an old broken down hangar and it hadn’t been flown in probably 40 years. It’s a shame! Enjoy that 170. Hopefully you do some videos with it
So from when the plane was built to now I gained 50lbs. I did not do a WB when I put the new gear one, I know I should have. So to sum up, new gear, bigger tire and 670 swap I gained 50lbs. Hope this helps.
If somebody wants to compare the weight of a 670 against other rotax Motors there is a website I can't remember off the top of my head but there is a website that allows you to do a rough estimate it's not it's not going to incorporate the weight of the bigger radiators required in little knickknacks that do add up but for a rough ballpark idea and then look at horsepowered weight ratio somebody can pull up Road tax engineering specs for a comparison table and then get a rough rough idea and if they want to pursue it then they have to do a little bit more homework but for anybody out there that wants to do that it can give you an idea whether it's a good upgrade or not but I think everybody watching this video can see this is now a rocket ship upgrade
Thanks for the stoke man. I’m excited! No cobwebs visible on the plane or flying skills. Your hard work is paying dividends. Cheers.
Well when you called me out I had to fix that. Don't worry I know, Make Two of Everything haha.
My 670 on my Avid Mk IV is nearly a drop in from the 582, same mount. The weight difference is very small. Typically about 15 lbs total for the engine, exhaust, extra prop blade and electric fuel pump
Holy performance Batman!
Wow! Now you can fly with the STOL RATS over on the west coast! Can not wait till you are posting flying vids regularly. Fly safe.
When are you going to be joining us with that D motor?
@@dcavidflyer3073 Doing WT and BAl this week. Looks like the plane is very heavy. Still need to get flight instruction. It may be some time before I can fly my plane.
@@joseruiz-Joecool Keep me posted on your numbers for WT and BAL please. I want to see what you are coming in at and see where I am.
@@dcavidflyer3073 Will keep you posted.
Put the battery at the tail end,that motor so well tuned rips awesome.
I actually found my CG to be spot on with everting added in. But if it was off I was thinking the same, move the batt. Move weight I already have instead of adding. Good Call.
congrads, where did you get thre engine? Iam thinking of the same for my project, a dan reynolds special a chinook 2 . thanks, Dave
From Rotax Rick out of Florida. rotaxrick.wordpress.com/
I also have an Avid Flyer mark IV tail dragger with a 670 Rotax which I acquired used several years ago. After working out all the problems in the airframe, engine and fuel system it is ready to fly, but I cannot get it to make a straight takeoff run down the runway centerline. It most always wants to make a sudden radical left turn when full power is applied causing my take off to be aborted. What sequence of events do you use when you are taking off? You never seem to wander from the center of the runway. Please advise with your technique.
You may want to check the alinement of the gear. A darting to the left might be due to that or even a sticking brake pad. If I recall the rotax blade spins in the opposite direction from a Lycoming or continental. These engines will cause the plane to pull left due to the torque, also coming up on the mains will make you go left due to gyro effect. I do not think this applies to the Rotax. If its just engine force pulling you left and not misaligned gear or sticking brake. Try applying right rudder and pushing power in slow. Also recommend getting a CFI who know tailwheel and Rotax to fly it.
Fantastic. I have an Avid C with 582.
How do the motor mounts fit?
Is it fitted for flight. Dual ignition system?
Yes the 670 and 582 are same lower case so it was direct built up to my existing mount. Yes the head comes with dual ignition system.
Dang, that is impressive.
Amazing results!!!
Thank you Howard. Its actually coming together.
That's bad ass, now i want one ! What's the stall speed for it? And do you know where i can get building plans ?
They are a blast man. Stall speed is around 35-42mph. Plans might be hard to come by you can look on Barnstormers for kits not finished, avidfoxflyers.com/. These would be your best bets. good luck.
@dcavidflyer3073 thanks I'm going to look there to. I looked at the files on the world wide avid flyers on Facebook. And they had some plans for Avids and the knock off the Raven. Buying one would be probably be my best bet but building one would be fun.
The U.K. LAA won’t allow the bigger rotax 2 stroke engines, which is a pity because that engine would be fantastic in my speed wing.
That is a shame, it seems to be a pretty power full power plant.
EEEHaw! Enjoy your labors! Exciting!
Very, its a big win for me.
Man what a difference
Awesome! Hey curious what we’re you seeing for cruise speed with cowling off?
Tony, I did not actually take it up and fly without the cowling. With cowling I was seeing about 85mph. This is with climb pitch, stol wing and draggy tires.
@@dcavidflyer3073 right on, thanks. Stoked to see that bad boy running good!
Dude, that is incredible!! So Bitchen!! Sounds bad-ass too!
Right!! it just sounds mean!
No videos lately, are you still working on it? I talked to Rotax Rick today about my 618. I’m sending it to him and was looking forward to see how your 670 is doing. Are you happy with the build?
hey I built the plane up flew it and sold it. I really did like the 670 performance. You will see a big jump in STOL activities. I did not set my prop up for cruse but to get off the ground quick, so I can not contest to the cruse. From what I know you would see some gain in cruse speed, but this plane and wing/gear/tires had so much drag. I sold it because I wanted a plane with more room, so I purchased a 170B. I really do love the plane and 670 for fun get out and spend a few hours flying.
@@dcavidflyer3073 Damn! I’d love to have a 170B that’s a nice 4 place tail dragger! My buddy’s dad has one sitting in an old broken down hangar and it hadn’t been flown in probably 40 years. It’s a shame! Enjoy that 170. Hopefully you do some videos with it
What wing do you have? TIA
this is the heavy hauler wing.
What was the total weight difference? 582 versus 670
So from when the plane was built to now I gained 50lbs. I did not do a WB when I put the new gear one, I know I should have. So to sum up, new gear, bigger tire and 670 swap I gained 50lbs. Hope this helps.
If somebody wants to compare the weight of a 670 against other rotax Motors there is a website I can't remember off the top of my head but there is a website that allows you to do a rough estimate it's not it's not going to incorporate the weight of the bigger radiators required in little knickknacks that do add up but for a rough ballpark idea and then look at horsepowered weight ratio somebody can pull up Road tax engineering specs for a comparison table and then get a rough rough idea and if they want to pursue it then they have to do a little bit more homework but for anybody out there that wants to do that it can give you an idea whether it's a good upgrade or not but I think everybody watching this video can see this is now a rocket ship upgrade
@@paulkainer269 Well said Paul, the power to weight ratio is really unmatchable. 64 Hp to 92Hp with minor weight gain.
can we put a 912 100 hp in this? this is a real question. 😅
Yes you can, just need to add weight to the back to keep the CG in place. Also limits useful load.
Why install a 912? The 670 has 92 HP and very small weight increase. The 670 from Rick is 1/3 the cost of a 912, also.
Nice work man get some hrs on it and take it to ArknSTOL in Sept.
So just googled this and that is bad ass. Defiantly a goal to make it . You going?
Planing on it. Super excited too
Take video for me!